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For most compatible PCs, buy a 2TB PCIe 4.0 NVMe SSD. It offers the most useful balance of Steam-library capacity, price per terabyte and game-loading responsiveness. The Samsung 990 PRO 2TB and WD_BLACK SN850X 2TB are strong high-end examples; choose between them based on sale pricing, heatsink options and the warranty or endurance terms available in your region.
Compatibility comes before benchmark numbers. Confirm that your desktop or laptop has an M.2 2280 socket, the right M-keying and PCIe support, and enough clearance for a bare drive or heatsink model. Steam Deck-class handhelds commonly require the shorter 2230 format, so a desktop 2280 SSD is not a universal upgrade.
The short answer: which SSD should you buy?
A 2TB PCIe 4.0 x4 NVMe SSD is the default recommendation for a current gaming desktop or laptop that supports M.2 2280 drives. It gives a large enough working library without paying the premium that often comes with the highest-capacity models, while Gen4 performance is already the mainstream gaming sweet spot.
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The Samsung 990 PRO 2TB is the clearest all-round recommendation when your system supports PCIe 4.0. Samsung specifies TLC NAND, NVMe 2.0, sequential reads of up to 7,450 MB/s, sequential writes of up to 6,900 MB/s and a five-year limited warranty. The WD_BLACK SN850X 2TB is a close alternative, particularly when its price, an optional heatsink or its broader capacity range is more attractive.
#1 Best Overall
- MEET THE NEXT GEN: Consider this a cheat code; Our Samsung 990 PRO Gen4 SSD helps you reach near max performance with lightning-fast speeds; Whether you’re a hardcore gamer or a tech guru, you’ll get power efficiency built for the final boss
- REACH THE NEXT LEVEL: Gen4 steps up with faster transfer speeds and high-performance bandwidth; With a more than 55% improvement in random performance compared to 980 PRO, it’s here for heavy computing and faster loading
- THE FASTEST SSD FROM THE WORLD'S FLASH MEMORY BRAND: The speed you need for any occasion; With read and write speeds up to 7450/6900 MB/s you’ll reach near max performance of PCIe 4.0 powering through for any use
- PLAY WITHOUT LIMITS: Give yourself some space with storage capacities from 1TB to 4TB; Sync all your saves and reign supreme in gaming, video editing, data analysis and more
- IT’S A POWER MOVE: Save the power for your performance; Get power efficiency all while experiencing up to 50% improved performance per watt over the 980 PRO; It makes every move more effective with less consumption
Do not choose solely by the largest sequential-read figure on a product page. Random 4K behavior, sustained thermal performance and enough free capacity affect how a drive handles maps, game assets, saves and updates. If you are replacing a hard disk, almost any good SSD will feel dramatically faster. If you already have a SATA SSD, a Gen4 NVMe upgrade can help, but the improvement varies by game and may be modest when CPU decompression, shader compilation or network checks dominate.
Check compatibility before spending money
An SSD that cannot be installed, cooled or addressed at its advertised speed is a poor upgrade regardless of its benchmark rating. Complete this checklist for the exact computer or handheld you own.
1. Identify the physical length
- M.2 2280: The 22 mm-wide, 80 mm-long format used by most desktop and full-size laptop NVMe drives, including the 990 PRO and SN850X.
- M.2 2230: A shorter format used in many compact handhelds and some ultraportables. Steam Deck-class devices generally require this size; a 2280 drive will not fit simply because it is also an M.2 device.
Check the motherboard manual, laptop service manual or the manufacturer’s parts list for the supported length. A socket with a single mounting point does not prove that every M.2 length is supported.
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2. Confirm keying and protocol
Look for an M-key M.2 socket that supports NVMe over PCIe. M.2 describes the shape, not the storage protocol: some M.2 sockets accept SATA drives only, while others accept PCIe NVMe drives. A PCIe 4.0 SSD can usually operate in a PCIe 3.0 slot, but it will be limited by the older interface. Verify the number of available PCIe lanes as well as the generation.
3. Check heatsink clearance
Desktop motherboards may include an M.2 cover or heatsink. A drive with its own heatsink can be too tall to fit beneath that cover, a laptop’s bottom panel or a handheld’s internal shield. PC Gamer’s 2026 buying checklist specifically calls out the SSD socket and whether a pre-fitted heatsink is required. Choose a bare drive when the system already supplies cooling, and choose a heatsink version only when the chassis has room for it.
4. Account for power and airflow
Laptops and handhelds have less airflow and tighter power limits than desktops. A high-performance drive may run correctly but throttle during a long installation, update or file transfer. In a compact system, confirm the maker’s thermal and power guidance and leave space for the intended thermal pad or shield.
Rank #2
- PCIe 4.0 Performance: Delivers up to 7,100 MB/s read and 6,000 MB/s write speeds for quicker game load times, bootups, and smooth multitasking
- Spacious 1TB SSD: Provides space for AAA games, apps, and media with standard Gen4 NVMe performance for casual gamers and home users
- Broad Compatibility: Works seamlessly with laptops, desktops, and select gaming consoles including ROG Ally X, Lenovo Legion Go, and AYANEO Kun. Also backward compatible with PCIe Gen3 systems for flexible upgrades
- Better Productivity: Up to 2x faster than previous Gen3 generation. Improve performance for real world tasks like booting Windows, starting applications like Adobe Photoshop and Illustrator, and working in applications like Microsoft Excel and PowerPoint
- Trusted Micron Quality: Built with advanced G8 NAND and thermal control for reliable Gen4 performance trusted by gamers and home users
5. Check the available slot and boot support
Some desktops have several M.2 sockets with different PCIe generations or lane-sharing rules. The manual may show that installing a drive in one socket disables particular SATA ports or reduces the graphics slot’s available lanes. This does not make the SSD incompatible, but it can change the best installation location. For a boot-drive replacement, confirm that the firmware supports NVMe booting and that you have a plan to clone or reinstall the operating system.
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PCIe 4.0 NVMe drives combine high throughput with broad motherboard and laptop support. PC Gamer recommends Gen4 NVMe for gaming and notes that PCIe 5.0 models can require more cooling while offering limited real-world gaming benefit today. That makes Gen5 difficult to justify for a Steam-focused upgrade unless your platform already provides the slot, cooling and price you want.
Sequential read speed describes a large, continuous transfer. Game loading is less tidy: the drive reads many small files, accesses data in parallel and may wait for the CPU to decompress assets. Random 4K performance is therefore especially relevant to loading maps, assets and game saves. A drive with a lower headline sequential number can feel just as quick, or quicker, in a particular game if its random behavior and sustained thermals are stronger.
Interface speed is also only one part of the path from storage to a playable scene. CPU decompression, shader compilation, anti-cheat startup, online authentication and server response can all add time. Treat a manufacturer’s loading demonstration as a scenario-specific result, not a promise that every Steam title will load in the same number of seconds.
Capacity: choose around your installed library
Capacity determines how often you uninstall games, move them between drives and wait for redownloads. Current AAA installations can consume a substantial part of a 1TB drive after Windows, applications and updates are included, so 2TB is the practical default for a dedicated Steam library.
| Capacity | Best fit | Trade-off |
|---|---|---|
| 1TB | A smaller library, a secondary game drive or a tight budget | Fills quickly when several large games, texture packs and recordings are kept installed |
| 2TB | Most gaming desktops and laptops; a balanced Steam-library default | Costs more upfront than 1TB but usually reduces uninstall and reinstall cycles |
| 4TB | Players who keep many large games installed, use multiple launchers or store game captures locally | Higher purchase cost; confirm that the laptop or motherboard firmware supports the capacity |
| 8TB | Very large libraries and desktop systems with a suitable slot and budget | Less common in laptops and compact systems; value depends heavily on the current price per usable terabyte |
Samsung lists the 990 PRO in 1TB, 2TB and 4TB capacities. SanDisk lists the WD_BLACK SN850X in capacities up to 8TB. Compare price per usable terabyte at the time you buy, not an old launch price, and leave free space for updates and the drive’s housekeeping. A nearly full SSD can make patching and file management more difficult even when the games still launch.
Rank #3
- SPEED UP PROJECTS. Launch creator applications fast with uncompromising PCIe 4.0 read speeds up to 7,100MB/s,[2] (1TB and 2TB[1] models) and write speeds up to 6,700MB/s[2] (1TB[1]-4TB[1] models).
- CREATE AND STORE MORE. Make more room for your 4K videos and high-resolution images with capacities from 500GB[1] up to 4TB[1] on M.2 2280 built with our trusted 8th generation SANDISK BiCS QLC 3D CBA NAND.
- IT GOES WHERE YOU GO. With an all-new power efficient design, your drive delivers high performance with low power, giving you more time to be productive while on the go.
- UNCOMPROMISED RELIABILITY. With up to 1,200 TBW[3] (4TB[1] model) endurance rating, your drive is designed for creators.
- KEEP YOUR DRIVE UPDATED. Monitor your SSD’s performance and check for updates with the downloadable SANDISK Dashboard application.[5]
Recommended drives and what their specifications mean
| Drive | Interface and form | Published performance or capacity | Thermal and support notes |
|---|---|---|---|
| Samsung 990 PRO | PCIe Gen 4.0 x4, NVMe 2.0, M.2 2280 | Up to 7,450 MB/s sequential read and 6,900 MB/s sequential write; 1TB, 2TB and 4TB models | TLC NAND, Dynamic Thermal Guard and a heat-spreader label; five-year limited warranty |
| WD_BLACK SN850X | PCIe 4.0 x4, M.2 2280, M-key host port | Up to 7,300 MB/s sequential read on 1TB–4TB models; capacities up to 8TB | Available in versions with an optional heatsink; verify clearance in the target system |
| Crucial T500 | PCIe Gen4 NVMe | Manufacturer cites Micron testing of Forspoken, Call of Duty and Valorant boot or loading behavior; exact figures and capacity range are not stated in the cited material | Compare independent tests and the specific model’s thermal solution before ranking it against the two drives above |
Samsung 990 PRO: the default 2TB choice
The 990 PRO fits the common M.2 2280 PCIe 4.0 x4 NVMe slot and uses TLC NAND. Its published sequential figures are more than sufficient for a gaming system, but its appeal is the complete package: high random responsiveness, a stated five-year limited warranty, and thermal management through Samsung’s Dynamic Thermal Guard and heat-spreader labeling.
Samsung’s own Forspoken test measured approximately one second for map loading on the 990 PRO, compared with four seconds on a SATA SSD and 28 seconds on an HDD under Samsung’s stated test systems. Those numbers demonstrate the scale of an HDD-to-SSD change and the smaller SATA-to-NVMe gap, but they are vendor results under particular hardware and software conditions rather than a universal Steam benchmark.
WD_BLACK SN850X: a strong capacity and heatsink alternative
The SN850X is a PCIe 4.0 x4 M.2 2280 drive for computers with an M-key port. SanDisk lists up to 7,300 MB/s sequential read for the 1TB through 4TB models and offers capacities up to 8TB. Select the heatsink version only when the case, laptop or motherboard cover has the required clearance. It is especially compelling when a sale makes its price per terabyte lower than the equivalent 990 PRO or when you need a 4TB or larger model.
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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crucial T500: consider it when independent testing supports the price
Crucial positions the T500 as a PCIe Gen4 NVMe gaming SSD and cites Micron testing involving Forspoken, Call of Duty and Valorant. These are manufacturer claims. Use independent game-load tests, the exact capacity and the thermal design of the model in front of you before treating it as faster than another Gen4 drive.
How much faster will Steam games load?
The largest perceived change normally comes from moving from an HDD to any good SSD. Mechanical seek latency disappears, small-file access becomes much more responsive and Windows itself feels faster. In Samsung’s Forspoken example, the vendor measured about 28 seconds on an HDD, four seconds on a SATA SSD and one second on the 990 PRO, using its stated test systems.
From SATA SSD to PCIe 4.0 NVMe, gains are game-specific. Some titles become a little quicker; others show almost no change because the CPU, shader compiler, decompression stage or network login is the bottleneck. Do not promise a fixed percentage improvement without testing the reader’s hardware and the particular game. The same drive can produce different results between a first launch, a repeated launch from cache, an online session and a level transition.
Rank #4
- This product has been replaced by our latest generation. Please search for the SANDISK Optimus GX 7100 NVMe SSD
- HIGH-OCTANE GAMING. Experience speeds up to 7,250MB/s read and 6,900MB/s write (1-2TB models), with up to 35% faster performance than previous generation.
- PURPOSE-BUILT. Designed for serious on-the-go gamers, with a PCIe Gen4 interface and SANDISK’s next generation TLC 3D NAND.
- MORE TIME TO CLEAR THAT CHECKPOINT. Built with laptops and handheld gaming devices in mind, with up to 100% more power efficiency over the previous generation.
- DO MORE WITH DASHBOARD. Ensure your drive is optimized for prime performance with the downloadable WD_BLACK Dashboard (Windows only).
Storage can also improve non-loading tasks: installing a game, applying a patch, verifying files and moving a Steam library are often limited by a mixture of storage, CPU and network speed. The benefit is real but not guaranteed to scale with the sequential figure printed on the box.
Installation and Steam setup
Prepare the hardware
- Back up irreplaceable saves, documents and recordings. Cloud saves are useful but should not be your only copy.
- Shut down the computer completely, disconnect external power and follow the system maker’s service guidance. On a desktop, switch off the power supply and discharge residual power.
- Install the SSD in the verified M.2 socket, align the notch with the M-key, press it flat and secure it with the correct standoff and screw. Do not force the module or bend it under a heatsink.
- Replace the motherboard cover or laptop shield exactly as designed, ensuring that the thermal pad contacts the controller and NAND area where specified.
Initialize a secondary game drive in Windows
- Boot Windows and open Disk Management from the Start menu’s search results.
- Initialize the new disk as GPT when Windows prompts you on a modern UEFI system.
- Create a simple NTFS volume, assign a drive letter and give it a recognizable label such as
Steam Games. - In Steam, open Steam > Settings > Storage, choose Add Drive or the plus button, and select the new volume.
- To move an installed title, select it in Steam’s Storage view and use the move option to choose the new library. Steam will verify files after the transfer.
Labels and button names can vary slightly by Steam client release. The important checks are that Windows sees the full capacity, the drive is formatted, and Steam’s Storage page lists the new library location.
Replacing the boot drive
A boot-drive replacement requires either a clean operating-system installation or a disk clone. A clean install avoids carrying old partitions and drivers forward but requires reinstalling applications and configuring Steam libraries. A clone preserves the existing environment but needs a reliable cloning process and enough space on the destination. After either method, install the SSD maker’s current firmware utility when available, apply firmware updates carefully and confirm that Windows and Steam can read the drive before erasing the old disk.
Thermals, firmware and sustained performance
Short benchmark bursts can look excellent while a long game installation or update causes the controller to heat up and throttle. PC Gamer checks temperatures for this reason. Desktop airflow, a motherboard heatsink and the orientation of the drive all affect sustained behavior; laptop and handheld cooling is more constrained.
- Use the motherboard’s M.2 heatsink when it fits the drive and its thermal pad makes full contact.
- Do not stack an aftermarket heatsink on top of a pre-fitted cover unless the system maker explicitly allows it.
- Keep firmware current, following the vendor’s instructions and maintaining a backup before updating.
- Leave working space on the volume so large patches and background housekeeping do not compete with a completely full filesystem.
- If performance falls during a long transfer, check temperature and airflow before assuming the SSD is defective.
The 990 PRO’s Dynamic Thermal Guard is Samsung’s stated thermal-control feature. The SN850X can be purchased with an optional heatsink. Neither feature removes the need to verify the actual chassis clearance and airflow.
Common upgrade mistakes and fixes
Buying a 2280 drive for a 2230 handheld
Symptom: The SSD is wider or longer than the original module, or the mounting screw cannot align. Fix: Return it unopened if possible and select the exact 2230 NVMe format and capacity supported by the handheld. Check power and thermal limits as well as physical size.
Best Value
- Ideal for high speed, low power storage
- Gen 4x4 NVMe PCle performance
- Up to 6,000MB/s read, 4,000MB/s write
- Includes Acronis cloning software
- 5-year limited warranty
Assuming every M.2 slot is NVMe
Symptom: The drive is not detected even though it fits. Fix: Recheck the manual for SATA-only sockets, PCIe lane sharing, BIOS support and the correct M-key orientation. Reseat the module without forcing it.
Installing a heatsink that does not fit
Symptom: The motherboard cover will not close or the laptop bottom panel bows. Fix: Use the board’s supplied heatsink, a bare SSD with the approved thermal pad or the drive variant specified for the chassis.
Expecting every game to gain the same number of seconds
Symptom: One title loads much faster while another barely changes. Fix: Measure complete launch or level-transition time on the same hardware. CPU decompression, shader compilation and network checks can dominate a particular title.
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Symptom: Updates fail for lack of temporary space, or file moves become inconvenient. Fix: Keep practical free space, remove unused shader caches or recordings when appropriate and use Steam’s Storage page to move less-played games to another volume.
Choosing between 1TB, 2TB, 4TB and 8TB
Choose 1TB when
- You keep only a few active games installed.
- The SSD is a secondary drive beside an existing large disk.
- Your platform has a strict budget and you accept more frequent uninstalling.
Choose 2TB when
- You want one straightforward Steam library for a normal desktop or laptop.
- You play several large games concurrently and want room for updates.
- You want the best balance rather than the lowest purchase price or maximum capacity.
Choose 4TB or more when
- You keep a large catalog installed for offline play or slow internet connections.
- You use several launchers, large mods, texture packs or local recordings.
- Your motherboard, laptop firmware and budget support the larger drive.
Capacity is more important than chasing the last increment in sequential speed. A 4TB Gen4 model that lets you keep the games you actually play installed can be more useful than a faster but smaller drive that is constantly being cleared.
When a different upgrade is more sensible
If your system still boots from an HDD, replace that drive before spending extra on a premium NVMe model. The move to solid-state storage removes the biggest source of seek latency and improves the operating system as well as games. If you already use a SATA SSD, confirm that your board or laptop exposes an NVMe-capable M.2 slot before buying.
On a system with a PCIe 3.0-only slot, a PCIe 4.0 drive remains usable but cannot deliver its Gen4 peak. It may still be a sensible purchase if you plan to move the drive to a newer system later, but compare the price with a good PCIe 3.0 model. On a very old or thermally constrained computer, adding memory, improving cooling or addressing CPU limitations may change loading and stutter more than a faster storage interface.
Quick Recap
A practical buying decision
- Measure the slot: Confirm 2230 or 2280 length, M-keying and the number of sockets.
- Confirm PCIe support: Record the slot generation and available lanes; do not assume the fastest drive will run at full speed.
- Pick capacity: Start at 2TB for a general Steam library; move to 4TB or 8TB when your installed collection justifies it.
- Choose cooling: Match a bare drive or heatsink version to the actual clearance and airflow.
- Compare value: Check current price per usable terabyte, warranty and endurance terms, not just the sequential-read headline.
- Plan the migration: Decide between a new Steam library, moving selected games or cloning the boot drive, and make a backup first.
- Set expectations: Expect the biggest loading improvement from HDD-to-SSD; treat SATA-to-NVMe gains as title- and system-dependent.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
