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Matter

A photo portrait of Yves Guillemot.
Product Reviews

Ubisoft CEO summoned to appear before French court in relation to harassment trial, as the publisher says it will ‘continue to cooperate with the justice system in this matter’

by admin August 25, 2025



Ubisoft CEO Yves Guillemot has been summoned to appear before a French court, following a trial in which three former executives were found guilty of workplace harassment in June.

In that trial, Serge Hascoët, Tommy François, and Guillaume Patrux were all given fines and suspended sentences ranging between twelve months and three years, after being convicted based on accusations including sexual misconduct, bullying and systemic racism. All three either resigned or were dismissed from Ubisoft following reports of their conduct in 2020.

Now, the trade union Solidaires Informatique and four other individuals, who were all involved in that original trial, have filed a subpoena instructing Guillemot to appear before the Brobigny District Court on October 1. As reported by French news network BFM TV (via VGC), the summons is in relation to that trial.


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In a statement to VGC, Ubisoft confirmed it had received summons from the union and related parties to appear before the court, specifying that “these are the same civil parties and this summons is based on the same facts as those in the case judged by the court this past June, following an investigation by the Public Prosecutor’s Office.”

Ubisoft added that “After that investigation, and contrary to the civil parties’ requests, the Public Prosecutor’s Office decided that there were no grounds to initiate criminal proceedings against Ubisoft or its management, a decision it confirmed during its closing arguments at the hearing last June.”

Ubisoft concluded by saying it would “continue to cooperate with the justice system in this matter, as it has done over the past five years in the review of the facts related to this case.”

Hascoët, formerly Ubisoft’s chief creative officer, received an 18-month suspended sentence and a fine of €40,000/$47,190, after being found guilty of “psychological harassment and complicity in sexual harassment.” According to both court testimony and an internal Ubisoft investigation, employees under Hascoët were subjected to racial slurs and Islamophobic pranks.

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François, meanwhile, was convicted on charges of sexual misconduct and attempted sexual assault, accused of trying to forcibly kiss an employee who was restrained during a holiday party. The former vice president of editorial and creative services received a heavier suspended sentence of three-years and a fine of €30,000/$35,340. Former game director Patrux received a 12-month suspended term and a €10,000/$11,800 fine. His sentencing described his bullying as “smaller scale” but “particularly intense”.

In May, it was reported that Guillemot and Ubisoft’s human resources director Marie Derain would be summoned to testify in the original trial. But Ubisoft denied this report, stating that “Neither Ubisoft, Yves, nor anyone from our HR team are parties to these proceedings.”

In addition to its statement responding to the summons, Ubisoft’s executive vice president Cecile Russeil said “Our top priority is to ensure the absolute protection of the physical and moral integrity of its employees, through a policy of prevention and zero tolerance with regard to sexual or moral harassment, sexist behaviour, assault, insult, or discrimination of any kind.”



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August 25, 2025 0 comments
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Hermen Hulst, managing director and co-founder of Guerrilla Games, speaks during a Sony Corp. event ahead of the E3 Electronic Entertainment Expo in Los Angeles, California, U.S., on Monday, June 15, 2015.
Gaming Gear

After cancelling 8 of the 12 live service games Sony promised to release by 2025, PlayStation studios boss says the number doesn’t really matter: ‘What is important to me is having a diverse set of player experiences’

by admin August 25, 2025



By the time Sony started printing money releasing its exclusives onto PC, the company had made a name for itself delivering the biggest and best singleplayer games on the market. Its run of solo PS4 exclusives from Bloodborne to The Last of Us Part 2 was so strong that it blew Microsoft’s console strategy out of the water, in a way that the Xbox has arguably never recovered from. Even we PC heads with our vast Steam libraries had to acknowledge those games were pretty great.

Yet for the PlayStation 5, Sony decided it would almost completely ignore that legacy, and instead be all about live service. In 2022, former CEO Jim Ryan promised Sony would make and release 12 live-service games by 2025. As of 2025, only one of these—Helldivers 2—has enjoyed a successful launch. Seven were cancelled before release. Three are supposedly still in development (including the deeply troubled Marathon) and one of them was Concord.

It’s a strategy that has, so far, proven catastrophic, leaving the PS5 largely bereft of quality first-party exclusives. But if you thought gazing upon this virtual graveyard might cause Sony to reconsider its priorities, think again.


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Concord – Gameplay Trailer | PS5 Games – YouTube

Watch On

Sony Interactive Entertainment’s Studio Business Group CEO Herman Hulst was recently asked about Sony’s live-service strategy by the Financial Times (via GamesRadar), as part of an in-depth article about the company’s broader business strategy. “The number [of live-service releases] is not so important,” Hulst told the FT. “What is important to me is having a diverse set of player experiences and a set of communities.”

Instead of changing strategy to avoid massive live-service failures like Concord, or cancellations like The Last of Us Online, Hulst says he basically wants Sony to fail better. “I don’t want teams to always play it safe, but I would like for us, when we fail, to fail early and cheaply.”

To change these massive failures into, er, smaller failures, Hulst says PlayStation has implemented several new safeguards, such as “more rigorous and more frequent testing in many different ways.” According to the FT, this includes a higher priority on group testing, more cross pollination of ideas within Sony, and “closer relationships” between top executives. “The advantage of every failure…is that people now understand how necessary that [oversight] is.”

I would be more convinced by what Hulst says if Sony had demonstrated its PS4-era strategy no longer worked before going all in on chasing the theoretical live-service money train. Those glossy singleplayer titles were often enormously expensive to make, and selling games in general has become significantly harder over the last five years. But while Marvel’s Spider-Man 2 seems to have been a commercial disappointment, God of War: Ragnarok was the fastest-selling PlayStation title ever on launch in 2022, and had sold 15 million copies a full year before it came to PC in September last year.

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August 25, 2025 0 comments
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What Is the Magnetic Constant and Why Does It Matter?
Product Reviews

What Is the Magnetic Constant and Why Does It Matter?

by admin August 25, 2025


This means these three values can’t be independent; if you know two of them, you can derive the third. How do physicists deal with this? We define the speed of light as exactly 299,792,458 meters per second. (How do we know it’s exact? Because we define a meter as the distance light travels in 1/299,792,458 of a second.) Then we measure the magnetic constant (μ0) and use that value along with the speed of light to calculate the electric constant (ε0).

Maybe that seems like cheating, but to even start doing actual science, at some point we have to make up arbitrary units and define some parameters. In fact, when you come down to it, all systems of measurement are made up, just like all words are made up.

Permeability of Free Space

Magnetic fields (represented by the symbol B) can be created by magnets, as shown in the photo up top. But because of that interdependence we talked about, they can also be made by moving electrical charges. (I’m using the shorthand term “charges” for charged particles, like electrons.) This is described by the Biot-Savart law:

You can see the magnetic constant (μ0) in there. We also have the value of the electric charge (q) moving with a certain velocity (v). So this says the magnetic field increases with the electric charge and decreases with the distance (r) from the moving charge—and the magnetic constant tells us precisely how much it varies.

Of course, we don’t deal with individual moving electrons very often. But we deal with streams of moving electrons all the time: That’s electric current, which we can measure. If we know the charge on the particles in coulombs, then the number of coulombs flowing per second gives us the current (I) in amperes. And we can write the equation above in terms of current: B = μ0I/(2πr).

It’s Everywhere

What this tells us is that electric current generates a magnetic field. This is used in all kinds of machines. For instance, it gives us electromagnets, where the magnetic force can be turned on and off to move metal objects in factories and scrapyards. It’s also how audio speakers create sound: An electric signal vibrates a magnetic driver, which generates pressure waves in the air.

Also magnetic fields influence electric currents. This is how motors work. There’s a current running through a coil of wire in the presence of a magnetic field that’s usually created with some permanent magnets. The force on the coil of wire causes it to turn, and there’s your motor. It could be a fan motor, part of your AC compressor, or the main drive for an electric car.

Wait! There’s more. Just as a changing electric field creates a magnetic field, a changing magnetic field creates an electric field—and that produces an electric current. This is how most of our power is generated. Some energy source—steam, wind, moving water, whatever—spins a turbine that rotates a coil within a magnetic field. The changing magnetic flux induces a voltage in the coil, converting mechanical energy into electrical energy that can be transmitted to your home.

Measuring the Magnetic Constant

How can we measure μ0? One method uses what’s called a current balance. A simple version of this has two parallel wires carrying electric current (I) in opposite directions, as shown in the diagram below. Then you suspend the two wires with strings so that they can move apart, like this:

The current in each wire creates a magnetic field at the location of the other wire, and this pushes them apart. As they move away, the magnetic force decreases and the horizontal component of the tension in the support string increases (because of the change in angle). Once these two forces are equal, the wires will be “balanced.”

If you know the value of the electric current and the distance between the wires (r), you can determine the magnetic constant, μ0. Then, as we showed above, you can use this value along with the defined speed of light to calculate the electric constant, ε0.

So yeah, all in all, you could say the magnetic constant is pretty important. Oh, and what is that constant value? According to the International Committee for Weights and Measures, μ0 = 1.256637061272 × 10–6 N/A2. No more, no less.



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August 25, 2025 0 comments
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A Physicist Wants to Turn Jupiter's Largest Moon Into a Gigantic Dark Matter Detector
Product Reviews

A Physicist Wants to Turn Jupiter’s Largest Moon Into a Gigantic Dark Matter Detector

by admin August 24, 2025


When searching for the unknown, classic physics wisdom holds that a bigger detector boosts the chances of discovery. A physicist is taking that advice to heart, advancing a bold plan to use none other than Ganymede—Jupiter’s largest moon—as a dark matter detector on an astronomical scale.

Dark matter refers to the “invisible” mass that supposedly constitutes 85% of the universe. There’s considerable evidence that dark matter exists, but it’s “dark,” meaning it doesn’t respond to light and very weakly interacts with other matter. The search for dark matter has tested the limits of physicists’ creativity, but a proposal by William DeRocco, a physicist at the University of Maryland, may be the most extraordinary yet. In a preprint submitted to arXiv, Rocco suggests that Ganymede’s craters may store evidence of dark matter particles, which spacecraft like NASA’s Europa Clipper or ESA’s JUICE could observe during their respective missions.

The paper, which has yet to be peer-reviewed, proposes that massive dark matter particles could have struck and penetrated Ganymede’s thick, icy surface, leaving deep, broad ruptures. Unlike the comparatively small-sized candidates for dark matter that ground-based detectors are searching for, these particles would be much larger. These extra-large dark matter particles would create “dark matter craters”—smaller dents on Ganymede’s surface comprised of distinctive minerals pulled to the surface from deep inside the moon’s oceans. 

“If you used something like ground-penetrating radar, you might be able to see this column of melted ice going all the way down through the ice,” DeRocco explained in an interview with New Scientist. Studying Ganymede’s surface with this proposal in mind could uncover some unexpected insights about cosmic dark matter, according to the paper.

In principle, the proposal sounds promising, Bradley Kavanaugh, an astrophysicist at the University of Cantabria in Spain who was not involved in the study, also told New Scientist. At the same time—like all dark matter experiments—there is still no definitive evidence that such heavy, massive dark matter particles actually exist.

If all of this sounds bonkers, I don’t blame you. Still, it’s important to remember that, as many physicists are keen to point out, solving a physics mystery often means testing bold, unconventional ideas. And while there’s no decisive evidence that this particular proposal is correct, there isn’t any evidence to discount it, either. We’ll have to wait and see if NASA or ESA takes up DeRocco’s idea, and if they do, whether Ganymede really does have a surface dotted with dark matter craters.



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August 24, 2025 0 comments
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Synology DiskStation DS925+ on a table wide image
Product Reviews

I spent weeks with the Synology DiskStation DS925+ NAS box and it didn’t miss a beat, no matter what I threw at it

by admin June 11, 2025



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Synology DiskStation DS925+: Two-minute review

Specs

(Image credit: Nick Ross)

CPU: AMD Ryzen V1500B
Graphics: None
RAM: 4GB DDR4 ECC SODIMM (Max 32GB)
Storage: 80TB (20TB HDD x4), 1.6TB (800GB M.2 x2)
Ports: 2x Type-A (5Gbps), 1x Type-C (5Gbps), 2x 2.5GbE Ethernet ports
Size: 166 x 199 x 223mm (6.5 x 7.8 x 8.8 inches)
OS installed: DSM 7
Accessories: 2x LAN cables, 2x drive-bay lock keys, AC power cord

Synology has been producing network attached storage (NAS) technology for over 20 years, and its devices have maintained a consistent look and feel. In that time, the company has developed a highly polished operating system that’s packed with a wide variety of bespoke and third-party apps that do everything from simply backing up files on a home or office network, through managing a household’s multimedia requirements, to running a business’s entire IT stack. The latter includes enterprise-grade backup, all kinds of server functionality, email and web-hosting, virtual machine management, surveillance camera management and much, much more.

In more recent years, Synology has hunkered down in its own segment of the NAS market – eschewing broad compatibility with third-party hardware providers and a Wild-West application community in favor of a more closed and professional operating environment, where you have to buy expensive Synology drives to populate the boxes. While these compatibility changes have driven some users away, what remains is still an incredibly robust, well-supported and well-documented ecosystem that has a huge community following.

The new DiskStation DS925+ is something of a popular, sweet-spot size that can suit new users and network admins alike. At a glance, it looks exactly like several generations of its predecessors and it operates very much like them. Its most significant features include four bays that support both 3.5-inch and 2.5-inch drives and two M.2 NVMe SSD slots. Its tool-less design and simple setup wizards make it quick and easy to build, and you can be up and running in less than 15 minutes. It runs quietly and can be positioned on top of a desk or hidden away (in a ventilated location) discreetly. To casual users (with deep pockets) who want access to Synology’s apps and need only basic NAS functionality, we could stop there. Enthusiasts will want to know more.


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(Image credit: Nick Ross)

The list of compatible drives is now smaller than ever. While Synology has kicked certification of third-party drives over to vendors like Seagate and WD, it doesn’t appear to have resulted in more choice… yet. At the time of writing, you’re still limited to Synology’s latest Plus Series consumer drives (which go up to 16TB), its Enterprise drives (up to 20TB), its 2.5-inch SSDs (up to 7TB) and its Enterprise-level M.2 NVMe drives (up to 800GB). All of them are considerably more expensive than incompatible third-party counterparts.

The DS925+ comes with one of its two SO-DIMM slots populated with 4GB of DDR4 ECC RAM. You can upgrade to two sticks of Synology’s own 16GB ECC RAM (for 32GB total) if required, but not if you’re looking to save money. The introduction of error-correcting (ECC) RAM at this level is a boon, nonetheless.

It should be noted that if you’re looking to the DS925+ as an upgrade for an older Synology NAS, it will allow third-party drives if it recognizes an existing DSM installation. However, you’ll get constant drive compatibility warnings in return.

Positive new hardware features include a beefed-up, quad-core, eight-thread AMD Ryzen V1500B processor (note that there’s no integrated GPU) and its two network ports are finally 2.5GbE. There are both front and rear-mounted USB-A 3.2 Gen 1 ports plus a new, slightly controversial, USB-C port for connecting an external, 5-bay extension unit (replacing old eSATA-connected options). What’s most bothersome, though, is the lack of a PCIe network expansion for upgrading to 10GbE connectivity, which limits the possible network transfer speeds.

Ultimately, the initial outlay for a DS925+ can be enormous compared to rivals on the market. However, if you’re going to make use of the vast libraries of free software applications and licenses, it’ll represent great value.

Synology DiskStation DS925+: Price & availability

Synology’s DiskStation DS925+ only recently launched and has limited availability in only a few markets. It’s listed at $830 / £551 / AU$1,099.

Overall, it’s well priced compared to its closest competitors such as the TerraMaster F4-424 Max, as well as other Synology NAS devices.

Synology DiskStation DS925+: Design & build

While the DiskStation DS925+ looks like its predecessors, I felt that it was somewhat more robust and less rattly than some of its forebears. Regardless of that, it’s still a small and discreet black box that will not draw attention to itself, wherever it’s located.

(Image credit: Nick Ross)

The tool-less design makes adding hard drives simple. For 3.5-inch drives, you just lift up the drive bay door, pull out the drive tray, unclip the tray’s side bars, put the drive in the tray, clip the bars back on (they use rubber grommets to reduce sound and vibrations) and slide it back in. If you want, you can ‘lock’ each drive bay with a key to deter opportunistic thieves.

Adding RAM involves removing the drive bays and adding SO-DIMMs to the internal slots on the side. Adding the M.2 NVMe drives involves simply unclipping the covers on the base and sliding them in. Adding six drives takes less than five minutes.

A fully populated DS925+ runs very quietly – Synology says just 20dB – and I can attest that there’s only a very quiet whooshing noise made by the dual 92mm fans, and the drives only make occasional, very low clicking and popping sounds.

Installing the operating system is also simple. A QR code in the box provides access to an online setup document with a link that automatically finds your NAS on the network before offering to install everything for you. After a quick firmware update, it reboots and you’ll be looking at the DSM desktop, in a web browser, just a few minutes later. The NAS will then prompt you to sign into a Synology account, set up SSO and MFA log-ins and install some basic apps.

Newcomers might struggle at first with the terminology surrounding the initial setup of the drives, but (at the basic level) the NAS walks you through the process. It involves organizing the drives into a storage pool, then creating a volume and then adding folders. You’ll also be prompted to list which users can have View, Read or Write access. At this point you’ve got functional network-attached storage that can be accessed across your network.

Image 1 of 4

(Image credit: Nick Ross)(Image credit: Nick Ross)(Image credit: Nick Ross)(Image credit: Nick Ross)

The operating system is well-polished and installing bespoke and third-party apps is simple thanks to the Package Center application which operates like a free App Store. It’s also simple to enable remote access using Synology’s QuickConnect ID short-web-link system.

An interesting change with the DiskStation DS925+ is the removal of the (6Gbps) eSATA port for connecting Synology’s optional, legacy, external drive bays and its replacement with a single (5Gbps) USB-C port which connects to a Synology DX525 5-bay expansion unit. I didn’t have an expansion bay on hand to test this, but the performance difference should be minimal.

While there are only two 2.5GbE network ports, you can combine them in various ways, with the easiest (load balancing) becoming operational in just a few clicks. It’s more suited to multiple connections rather than improving top speed, though.

Finally, it’s worth noting that compatibility with third-party drives is now strictly limited. At the time of writing, the DS925+ was only compatible with its own (up to 16TB) prosumer Plus Series hard drives, its (up to 20TB) Enterprise Series hard drives and (up to 7TB) SSDs, plus its 400GB and 800GB M.2 NVMe drives. All of these cost considerably more than third-party equivalents. Synology is blunt about why it has limited compatibility so much – it got sick of dealing with support requests that often boiled down to conflicts and crashes caused by drive failures and subsequent arguments with third-party drive vendors. While it’s annoying, I can sympathize with that.

  • Design & build score: 5 / 5

Synology DiskStation DS925+: Features

(Image credit: Nick Ross)

It’s tricky to know just where to start with the numerous features that are available with the DiskStation DS925+. It performs just about every business and consumer task you can imagine. For many smart-home users, the various multi-device backup utilities, multimedia organization tools and media-server functionality (including Plex, Emby and Jellyfin) will be used more than anything else.

For prosumer and business users, it can be your full-stack IT service provider. There are apps that can transform your NAS into an enterprise-grade backup solution with off-site (third-party and Synology C2) cloud capabilities; email server; web server; Synology Office application provider; surveillance camera manager; anti-malware protection; virtual machine manager and a VPN server.

In all of these applications, multiple user licenses are included, which boosts the value proposition through the roof.

There’s a multitude of third-party applications and high-quality documentation (covering just about everything) that has been created by a large and mature Synology-enthusiast community.

Network admins will also like the numerous drive-formatting options, granular user permission management and SSO and MFA security options.

Storage capacity can be increased via a USB-C connected, five-drive-bay expansion unit.

The two USB-A ports (front and rear) have had many functions removed so they can no longer be used to connect potential security nightmares like printers, media devices, or network adapters, but they can still be used for connecting external USB storage devices.

The twin 92mm fans are quiet and, in conjunction with well-designed vents, do a good job of cooling the NAS. That said, be sure to place it in a location where airflow isn’t impeded and the vents won’t get clogged with dust.

Synology DiskStation DS925+: Performance

(Image credit: Nick Ross)

To test the DiskStation DS925+, I installed four Synology 3.5-inch, 4TB hard drives and formatted them with Synology’s own RAID-5-like Btrfs file system which offers striped performance boosts, disk-failure redundancy protection and numerous enhancements that work with Synology’s backup utilities. It left me with a 10.4TB volume and meant I could lose/remove any one drive without suffering data loss.

I also installed two 400GB M.2 NVMe SSDs as a single Btrfs storage volume (they can also be used for caching) which gave me a usable capacity of 362.4GB.

I transferred files from one volume to the other and hit sustained transfer speeds that peaked at 435MB/s, but most people will be moving data externally.

I subsequently performed multiple tests to find its real-world limits, see what doing without a 10GbE port option meant and discover what benefits the two (configurable) 2.5GbE LAN ports offered. I did this by connecting the NAS to a high-end, TP-Link Deco BE85 Wi-Fi 7 Router (with 10GbE LAN ports) via Ethernet and downloading large video files using various wired and wireless configurations.

I compared the DS925+’s performance to that of an older, two-bay Synology DiskStation DS723+ that has a 10GbE wired connection, a dual 3.5-inch hard drive volume and a newly fitted, single, 800GB Synology M.2 NVMe SSD-based volume.

I tested using a high-end Asus ROG Strix Scar 17 X3D gaming laptop with a 2.5GbE LAN connection and Wi-Fi 6E, as well as a new Core Ultra (Series 2) Asus Vivobook 14 Flip with Wi-Fi 7.

I started with the DS723+ which I’ve been using for testing Wi-Fi routers. With the Scar’s 2.5GbE Ethernet port connected by wire to the Deco router, I saw sustained transfer speeds that hit 245MB/s for both the DS723+’s HDD volume and its NVMe volume. Over a 5GHz Wi-Fi 6E wireless connection, this dropped to 194MB/s for both volumes. Over a 6GHz Wi-Fi 6E wireless connection, it achieved 197MB/s using the HDD volume and 215MB/s for the NVMe volume.

Switching to the Wi-Fi 7 VivoBook, on the 5GHz wireless connection, it managed 180MB/s for both the HDD and NVMe volumes. However, when using the 6GHz Wi-Fi 7 network, it achieved 244MB/s for the HDD volume and an astonishing 347MB/s for the NVMe volume. That right there is the power of having a 10GbE-equipped NAS (with an NVMe drive) connected to a Wi-Fi 7 network. Cables, schmables! That’s more than enough for editing multiple streams of UHD video at once.

(Image credit: Nick Ross)

So, how did the newer DS925+ compare? When it was connected to the Deco via a single 2.5GbE port, the 2.5GbE LAN connected Asus laptop reached 280MB/s for the HDD volume and 282MB/s for the NVMe volume – a good 35MB/s quicker than the two-bay DS723+. Over 5GHz Wi-Fi these scores both dropped to 190MB/s which is similar to the DS723+, illustrating a likely 5GHz Wi-Fi bottleneck. Interestingly, performance was consistently slower during the Scar’s 6GHz tests, where it hit 163MB/s (HDD volume) and 172MB/s (NVMe volume), but this is again likely caused by the network, not the NAS.

When the VivoBook connected via the 5GHz network, it managed 186MB/s transfers for both volumes. Over Wi-Fi 7 this jumped up to 272MB/s for the HDD volume and 278MB/s for the SSD volume. So, thus far, the file transfer performance benefits of having NVMe storage on the DS925+ aren’t significant when passing through the bottleneck of its 2.5GbE LAN port.

Consequently, I bonded the two 2.5GbE connections together to form a ‘single’ 5GbE connection in an effort to boost performance. This takes just a few clicks in DSM’s control panel. I opted for the basic Adaptive Load Balancing option, but there are several other configurations for various types of network topology.

(Image credit: Nick Ross)

So, with the DS925+’s two Ethernet cables forming a single 5Gbps connection to the Deco router, I ran the tests again. The 2.5GbE-connected ROG Strix Scar saw transfer speeds (to both the HDD and SSD volumes) only reach 168MB/s, which is around 120MB/s slower than when the NAS was connected via a single 2.5GbE wired connection. Over 5GHz Wi-Fi this boosted (slightly) to 188MB/s for both volumes and over the 6GHz network, it dropped back to 170MB/s for both volumes. It’s fair to say that combining the DS925+’s two 2.5GbE ports is better suited to handling multiple network streams rather than boosting performance of a single connection.

Nonetheless, I repeated the test with the VivoBook. Over 5GHz Wi-Fi, both volumes saw transfer speeds of 176MB/s. Over 6GHz Wi-Fi 7, it hit 283MB/s.

So, what have we learned about the DS925+’s file transfer-speed potential? Using a 2.5GbE wired connection to and from the router, it tops out at 280MB/s. Connecting the laptop via 5GHz Wi-Fi typically sees transfer speeds of between 160MB/s and 185MB/s, but over 6GHz Wi-Fi 7, up to 283MB/s is possible. This means that, in the right circumstances, Wi-Fi 7 can match 2.5GbE connection speeds.

We also learned that combining the DS925+’s two 2.5GbE connections (at least, in my particular setup) reduces the top transfer speed. Most importantly, that means losing the option for a 10GbE upgrade stops us hitting insane 347MB/s speeds over Wi-Fi 7, and 283MB/s is the reduced ceiling. As such, it’s straight-up not worth using the M.2 drives for file transfer performance boosting as the 2.5GbE connection(s) act as a bottleneck.

That all said, the M.2 drives can still improve performance through caching functionality and Synology notes it can give a 15x improvement to random read and write IOPS. This will be a much bigger deal in situations with multiple connections occurring simultaneously.

While some high-end users will miss the option to upgrade to a 10GbE performance ceiling, I found it’s still more than enough to facilitate very high bitrate, 60FPS, UHD+ video playback (and multiple UHD video stream editing) in addition to having multiple simultaneous connections performing numerous lesser tasks.

  • Performance score: 4.5 / 5

Should you buy the Synology DiskStation DS925+?

It has become normal to gripe about the design decisions and limitations that Synology imposes on each generation of its prosumer NAS boxes. However, if we eliminate the potential purchasers it won’t suit – i.e. those who need a 10GbE connection and those who cannot afford all the expensive Synology hard drives required to populate it – it’s absolutely worth buying.

Its highly evolved chassis is deceptively well built in terms of tool-less access, rigidity, cooling and airflow. Its operating environment remains secure, robust and intuitive and is packed with features. Its software library will satisfy casual and demanding consumers plus network admins alike and almost all of it is free.

While it’s lost the hodgepodge, stick-your-old-hard-drives-in-a-box-and-hack-a-NAS-together old-school vibe, it’s now a reliable (and scalable) professional backbone for any business or smart-home.

As an all-around package, it’s the best on the market for its target audience. Yes, it can be expensive to populate with drives, but the subsequent total cost of ownership borne through reliability, software licensing and built-in security features help offset the burden of the initial outlay. This means that the DS925+ is, once again, a highly desirable winner from Synology.

Swipe to scroll horizontally

Attribute

Notes

Score

Value

A closed market makes buying drives expensive. But, the free software library can make it a bargain, regardless.

4.5

Design

It’s incredibly simple to put together thanks to its tool-less design. The software is voluminous, polished, mature, secure and reliable. It also runs cool and quiet.

5

Features

Whether you’re an undemanding consumer or a network admin, the DS925+ can do it all. 

5

Performance

The lack of an upgrade option to a 10GbE port limits peak performance, but it’s still not slow.

4.5

Total

Synology’s latest 4-bay NAS is as attractive as its predecessors, which is high praise indeed.

5

(Image credit: Nick Ross)

Buy it if…

Don’t buy it if…

For more network-attached storage options, we’ve also tested the best NAS & media server distro.

Synology DiskStation DS925+: Price Comparison



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What Is Matter? We Explain the Smart Home Standard (2025)
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What Is Matter? We Explain the Smart Home Standard (2025)

by admin May 26, 2025


The ideal smart home seamlessly anticipates your needs and instantly responds to commands. You shouldn’t have to open a specific app for each appliance or remember the precise voice command and voice assistant combination that starts the latest episode of your favorite podcast on the nearest speaker. Competing smart home standards make operating your devices needlessly complicated. It’s just not very … well, smart.

Tech giants try to straddle standards by offering their voice assistants as a controlling layer on top, but Alexa can’t talk to Google Assistant or Siri or control Google or Apple devices, and vice versa. (And so far, no single ecosystem has created all the best devices.) But these interoperability woes may soon be remedied. Formerly called Project CHIP (Connected Home over IP), the open source interoperability standard known as Matter arrived in 2022. With some of the biggest tech names, like Amazon, Apple, and Google, on board, seamless integration may finally be within reach.

Updated May 2025: We’ve added the Matter 1.4 and 1.4.1 specifications for enhanced multi-admin, energy management, and easier setup, and updated general progress for the standard.

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What Is Matter?

Matter enables different devices and ecosystems to play nicely. Device manufacturers must comply with the Matter standard to ensure their devices are compatible with smart home and voice services such as Amazon’s Alexa, Apple’s Siri, Google’s Assistant, and others. For folks building a smart home, Matter theoretically lets you buy any device and use the voice assistant or platform you prefer to control it. (Yes, you can use different voice assistants to talk to the same product.)

For example, you can buy a Matter-supported smart bulb and set it up with Apple HomeKit, Google Assistant, or Amazon Alexa—without having to worry about compatibility. Right now, some devices already support multiple platforms (like Alexa or Google Assistant), but Matter will expand that platform support and make setting up your new devices faster and easier.

The first protocol runs on Wi-Fi and Thread network layers and uses Bluetooth Low Energy for device setup. While it supports various platforms, you must choose the voice assistants and apps you want to use—there is no central Matter app or assistant. Because Matter works on your local network, you can expect your smart home devices to be more responsive to you, and they should continue to work even when your internet goes down.

What Makes Matter Different?

The Connectivity Standards Alliance (or CSA, formerly the Zigbee Alliance) maintains the Matter standard. What sets it apart is the breadth of its membership (more than 550 tech companies), the willingness to adopt and merge disparate technologies, and the fact that it is an open source project. Interested companies can use the software development kit (SDK) royalty-free to incorporate their devices into the Matter ecosystem. This is much simpler than certifying devices individually with each smart home platform.

Growing out of the Zigbee Alliance gives Matter a firm foundation. Bringing the main smart home platforms (Amazon Alexa, Apple HomeKit, Google Home, and Samsung SmartThings) to the same table is an achievement. It is optimistic to imagine a seamless adoption of Matter across the board, but it has enjoyed a rush of enthusiasm with many smart home brands jumping aboard, including August, Schlage, and Yale in smart locks; Belkin, Cync, GE Lighting, Sengled, Signify (Philips Hue), and Nanoleaf in smart lighting; and others like Arlo, Comcast, Eve, TP-Link, and LG.

When Did Matter Arrive?

Matter has been in the works for years. The first release of Project CHIP was due in late 2020, but it was delayed to the following year, rebranded as Matter, and then touted for a summer release. After another delay, the Matter 1.0 specification and certification program opened in 2022. The SDK, tools, and test cases were made available, and eight authorized test labs opened for product certification.

The first wave of Matter-supported smart home gadgets went on sale in the fall of 2022, and we have seen a steady trickle since then. The first update to the specification, Matter 1.1, arrived in May 2023 and consisted largely of bug fixes. Announced in October 2023, Matter 1.2 added support for nine new device types, including refrigerators, robot vacuums, and air purifiers, alongside improvements to existing categories.

The Matter 1.3 specification was published in May 2024, adding energy management, EV charging, and water management alongside support for new devices, including ovens, cooktops, and laundry dryers. It also brought improvements to Matter Casting, so on top of being able to cast from your phone to your TV, other smart devices, like your robot vacuum, can send messages to your TV to warn you if they’re stuck, for example.



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