Owners working out how to install an NVMe M.2 SSD keep coming back to the same line: the install took about ten minutes, and the machine felt like a different computer afterwards. That is the promise this guide is built around.
You are probably here because something feels slow. Windows takes a coffee break before the desktop icons appear, Excel hangs when you open a big workbook with Teams and thirty tabs already running, and your game library sits on a mechanical drive that sounds like it is thinking. Meanwhile there is an empty M.2 slot on your motherboard, roughly the size of a stick of gum, waiting for a drive that plugs straight into the PCIe lanes instead of crawling through a SATA cable.
Here is the short version. How to install an NVMe M.2 SSD comes down to five steps and one screw, and for most desktops and laptops the drive I would buy with my own money is the WD Black SN850X 2TB, because it is a DRAM-equipped Gen 4 drive that runs cooler and cheaper than the Gen 5 flagships while feeling identical in everyday use. Every drive on this page is collected in my Amazon storefront if you want to compare them side by side.
Top Pick
WD Black SN850X 2TB
Anyone upgrading a Gen 4 desktop or laptop who wants the speed they will actually notice, not the biggest number
Key specs
- PCIe Gen 4 x4, NVMe 1.4, M.2 2280
- Up to 7,300 MB/s sequential read (manufacturer, 2TB)
- Up to 6,600 MB/s sequential write (manufacturer)
- 1,200 TBW endurance at 2TB, 5-year limited warranty
- Sold bare or with a heatsink (heatsink model is PS5 compatible)
Reasons to buy
- Installs and is detected without fuss in the large majority of owner reports
- Runs cool enough for a standard motherboard M.2 cover
- WD Dashboard makes firmware updates and Game Mode simple
- DRAM cache keeps it feeling fast as a boot drive, not just in benchmarks
Reasons to avoid
- The heatsink version can clash with motherboard M.2 covers or a large GPU
- Gen 5 drives beat it clearly on sustained writes for video work
- Owners who never run the firmware tool are the ones reporting odd behaviour later
Full specs and support: www.westerndigital.com
In this guide
- The Eight Numbers on the Box
- How I Picked These Drives
- Does It Actually Feel Faster?
- A Year In: What Owners Report
- Buy It, or Walk Past It
- Four Drives, Head to Head
- How to Install an NVMe M.2 SSD in Five Steps and One Screw
- What It Costs After Checkout
- Questions I Get Asked Most
- Buy Once, Buy Right: The Bottom Line
- Related guides
The Eight Numbers on the Box
These are the manufacturer’s figures for the SN850X, and they are the eight numbers I would check on any drive before buying.
- Interface: PCIe Gen 4 x4, NVMe 1.4
- Form factor: M.2 2280 (80mm, the standard length in desktops and most laptops)
- Rated sequential read: up to 7,300 MB/s on the 2TB model
- Rated sequential write: up to 6,600 MB/s
- Capacities: 1TB, 2TB, 4TB
- Endurance: 1,200 TBW at 2TB (terabytes written before the warranty ends)
- Warranty: 5 years limited
- Versions: bare drive, or a heatsink model that also fits the PS5
One correction to the version of this guide I published earlier: the Samsung 990 Pro is a Gen 4 drive, not Gen 5, and it is rated at up to 7,450 MB/s rather than 11,000. I had that wrong. It matters less than you think, and I will explain why further down.
Newsletter
One email a week, and only when there is something in it
Every guide I published or rewrote that week, up to six of them, each with a line on who it is for and what it settles. No prices, no deals, nothing else.
It goes out on Thursday mornings. In a week when nothing new went up, nothing is sent.
Your address goes to MailerLite, who deliver the email, and nowhere else. Every email has an unsubscribe link. The email ends with one link to my Amazon storefront, and as an Amazon Associate I earn from qualifying purchases. Privacy policy.
How I Picked These Drives
I do not run a test lab. My method is research, not testing: this guide is built from the manufacturers’ spec sheets and from published testing and owner feedback reported by named outlets, and it was drafted with AI assistance. Here that testing is mainly Tom’s Hardware and TechPowerUp, whose SSD reviews include sustained-write and random-read results rather than a single benchmark screenshot.
Nine drives made the shortlist. Four survived: the SN850X, the Crucial P510 1TB, the WD Black SN8100 2TB and the Samsung 990 Pro 2TB, with the Samsung 990 EVO Plus 1TB kept as the cheap-and-cheerful option. The drives I dropped were mostly DRAM-less bargain models where owner reports repeat the same complaint: fine for a games library, disappointing as a boot drive once the write cache runs dry.
The Crucial T700 that used to sit in this guide is a good drive that has been overtaken. Crucial’s own Gen 5 line moved on, and the P510 delivers most of the headline speed with far less heat, which is why it replaced the T700 here. If you want the older comparison, I kept it: Crucial T700 vs Samsung 990 Pro.
Does It Actually Feel Faster?
Coming from a hard drive or a SATA SSD
If you are replacing a spinning hard drive, this is the biggest upgrade you can buy for the money, and nothing else in the case comes close. Boot goes from a wait to a blink, program launches stop stuttering, and Windows Update stops locking up the whole machine. Owners describe it as buying a new PC for the price of a drive, and that is not marketing, it is just what happens when random reads get roughly a hundred times faster.
Coming from a decent SATA SSD, temper your hopes. Boot times improve by a few seconds, big file copies improve a lot, and everything else feels about the same. The daily difference lives in tasks that move gigabytes: importing photos, exporting a video, unpacking a game update, restoring a backup. I go through this trade-off in more detail in SSD vs HDD in 2026.
1440p gaming and game load times
Games load fast on any modern NVMe drive. The difference between a 7,000 MB/s Gen 4 drive and a 14,000 MB/s Gen 5 drive at a loading screen is usually well under a second, because games ask for lots of small scattered reads rather than one long sequential slurp. Frame rates do not change at all, since the GPU and CPU decide those.
Where capacity beats speed: a single modern shooter with all its updates can eat well over 100GB, so 2TB is the size I would target if you play more than a couple of games. Running a drive nearly full is the one thing that genuinely slows an NVMe SSD down, because the fast SLC cache shrinks as free space disappears.
Photo, video and work-from-home loads
Editors are the people who actually feel Gen 5. Scrubbing 4K timelines, exporting long projects and shuffling multi-hundred-gigabyte project folders all lean on sustained writes, and that is the one place where the SN8100 pulls clearly ahead of the SN850X in published testing. For Zoom plus Slack plus Excel plus a browser that never gets closed, any of these drives is overkill in the best way, and the SN850X is the one I would stop at.
In a laptop
Laptops change the calculus, because heat and power draw matter more than peak numbers. A hot Gen 5 drive in a thin chassis with no heatsink will throttle, and it will pull more battery at idle. This is exactly why the P510 keeps showing up in laptop upgrade threads: Crucial pitches it as a low-power, single-sided Gen 5 drive, and single-sided matters because many slim laptops have no clearance for chips on both faces of the board.
A Year In: What Owners Report
Consistent praise for the SN850X comes down to three things: it installs without drama, it stays cool enough for most motherboard heatsinks to handle, and the WD Dashboard software is genuinely useful for firmware updates and for turning Game Mode on or off. Long-term reviewers who bought early 1TB and 2TB models and came back a year later mostly report nothing, which is the review you want on a storage device.
Complaints repeat too, and they are worth knowing. A recurring one is buying the version with the heatsink and then discovering it fouls the motherboard’s own M.2 cover or sits under the graphics card with no room. Another is the drive not showing up after install, which owner threads almost always trace back to the same two causes: the drive is in a slot that shares lanes and has been disabled in BIOS, or it needs initialising in Disk Management because a brand-new drive is simply blank.
Then there is the firmware pattern. WD, Samsung and Crucial have all shipped drives that later needed a firmware update, and owners who ignore the vendor utility for two years are the ones posting scary stories. Run the update tool once when you install, then once or twice a year. That is the whole maintenance routine.
Buy It, or Walk Past It
Buy It If:
- You are upgrading from a hard drive or SATA SSD and want the single biggest speed jump per dollar
- You have a Gen 4 motherboard or laptop, which covers most machines built since 2020
- You game at 1080p or 1440p and want capacity as much as speed
- You would rather have five years of warranty and a proven controller than the top line on a chart
Skip It If:
- Your workload is sustained heavy writes (long 4K or 6K exports, huge dataset transfers) where a Gen 5 drive earns its keep
- Your laptop or motherboard only has a SATA M.2 slot, in which case an NVMe drive will not work at all
- Your slot is a short 2242 or 2230 size, common in some thin laptops and handhelds
- You only need a scratch drive for game installs, where a cheaper DRAM-less model is fine
Four Drives, Head to Head
| Drive | Interface | Rated read (mfr) | Best for | Watch out for |
|---|---|---|---|---|
| WD Black SN850X 2TB | PCIe Gen 4 x4 | Up to 7,300 MB/s | Almost everyone upgrading a desktop or laptop | Heatsink version can foul motherboard covers |
| Crucial P510 1TB | PCIe Gen 5 x4 | Up to 11,000 MB/s | Gen 5 boards and thin laptops, cool and single-sided | DRAM-less design, only 1TB and 2TB sizes |
| WD Black SN8100 2TB | PCIe Gen 5 x4 | Up to 14,900 MB/s | Video editors and heavy sustained writes | Costs roughly double a Gen 4 drive of the same size |
| Samsung 990 Pro 2TB | PCIe Gen 4 x4 | Up to 7,450 MB/s | Samsung Magician users, PS5 with the heatsink model | Runs warm, needs firmware kept current |
The P510 is the smarter buy in two situations. One, you have a Gen 5 slot and you want the headline number without the heat and the price of a flagship. Two, you are putting a drive in a slim laptop, where its single-sided board and modest power draw matter more than any benchmark. My full write-up is here: Crucial P510 review.
Best Value
Crucial P510 1TB
Gen 5 motherboards and thin laptops where heat and power draw matter more than peak throughput
Key specs
- PCIe Gen 5 x4, M.2 2280, single-sided board
- Up to 11,000 MB/s sequential read (manufacturer)
- Capacities: 1TB and 2TB
- 5-year limited warranty
- Low-power design aimed at laptops and small builds
Reasons to buy
- Gen 5 read speeds without the heat of flagship Gen 5 drives
- Single-sided board fits slim laptops that reject double-sided drives
- Cheapest realistic route into Gen 5 for most buyers
Reasons to avoid
- DRAM-less design, so heavy sustained writes fall off once the cache fills
- Only two capacities, no 4TB option
- Gen 5 speed does nothing for gaming or office work
Go up to the SN8100 only if you get paid for moving big files. It is the fastest consumer drive I am comfortable recommending, it needs real cooling from either the motherboard heatsink or the version that ships with one, and for gaming it will not feel any quicker than the SN850X. Buying it for game loading is spending double for a difference you cannot perceive.
Upgrade Pick
WD Black SN8100 2TB
Video editors and anyone regularly writing hundreds of gigabytes who will genuinely use Gen 5 bandwidth
Key specs
- PCIe Gen 5 x4, M.2 2280
- Up to 14,900 MB/s sequential read (manufacturer)
- Up to 14,000 MB/s sequential write (manufacturer)
- Capacities include 1TB, 2TB and 4TB
- 5-year limited warranty
Reasons to buy
- Fastest consumer drive I am comfortable recommending for real work
- Holds up on long sustained transfers where cheaper drives collapse
- Same WD Dashboard software and 5-year warranty as the SN850X
Reasons to avoid
- Costs roughly double a Gen 4 drive of the same capacity
- Needs proper cooling from a motherboard heatsink or the heatsink model
- No perceptible gaming benefit over a good Gen 4 drive
Samsung’s 990 Pro remains a fine drive and often trades places with the SN850X depending on the week and the capacity, so if it lands cheaper in the size you want, buy it and do not agonise. I put them head to head in Samsung 990 Pro vs WD Black SN850X. If your budget is tight, the 990 EVO Plus is the honest compromise: slower on paper, fine in practice for a boot drive, and still a five-year warranty.
How to Install an NVMe M.2 SSD in Five Steps and One Screw
Step 1: Preparation
Shut the machine down properly, do not just sleep it. Pull the power cable, hold the power button for five seconds to drain the board, and on a laptop disconnect the internal battery if the service manual says to. Touch the metal chassis before you touch the drive to equalise static, and keep the tiny mounting screw somewhere it cannot roll away.
Step 2: Locate the M.2 slot
On a desktop it is a short horizontal connector on the motherboard, usually between the PCIe slots, often hidden under a metal heatsink plate you unscrew. On a laptop it lives under the bottom panel, generally near the battery or the fan. Check the manual for which slot runs at full speed, because on many boards the second and third slots share lanes with the chipset or disable a pair of SATA ports when populated.
Step 3: Install the SSD
Line the notch in the drive’s connector up with the key in the slot, hold the drive at roughly a 30-degree angle, and push it in until it stops. Press the far end flat and drive the screw in by hand, snug and no tighter. Some boards use a plastic latch instead of a screw, in which case you just click it down.
Step 4: Heatsink
Peel the plastic film off the motherboard heatsink’s thermal pad before you refit it, which is the single most common install mistake I see reported. Do not stack a drive’s own heatsink under the motherboard’s cover, pick one. In a laptop, a thin thermal pad between the drive and the metal shield is usually all the cooling you get, and all you need for a Gen 4 drive.
Step 5: BIOS and Windows setup
Boot into BIOS with F2 or Delete and confirm the drive is listed. If it is your new boot drive, set it first in the boot order. In Windows, right-click the Start button, open Disk Management, initialise the disk as GPT and format it NTFS. A brand-new drive is invisible in File Explorer until you do that, which explains most of the panicked reviews titled “drive not detected”.
Pro Tips from Real Owners
- Cloning your old Windows install with a USB M.2 enclosure is easier than a clean install, and the enclosure then becomes a fast external drive for your old SSD
- If you clone, disconnect the old drive on first boot so Windows cannot get confused about which one it started from
- Install the vendor tool (WD Dashboard, Samsung Magician, Crucial Storage Executive), check firmware once, then leave it alone
- Photograph the laptop’s bottom panel screws before you remove them, since several are usually different lengths
- Do not fill the drive past about 80 percent if you care about write speed
- Buy 2TB rather than 1TB if the gap is small, because nobody has ever regretted a bigger drive
What It Costs After Checkout
Endurance is a non-issue for normal use. WD rates the 2TB SN850X at 1,200 TBW, and a typical home-office and gaming user writes a few terabytes a year, so the warranty runs out long before the flash does. Editors writing hundreds of gigabytes a week should do the maths, everyone else should stop worrying about it.
The costs people forget are the small ones. A USB M.2 enclosure for cloning, a heatsink if your board has no cover, a screw kit if your motherboard came without one, and possibly a Windows licence transfer headache if you go for a clean install. Gen 5 adds a real cost too, in heat and in power, and a hotter drive in a small case means a fan runs more often.
One more trap worth naming: buying the fastest drive for a machine that cannot use it. A Gen 5 drive in a Gen 3 laptop runs at Gen 3 speeds, which is a full-price drive delivering budget-drive performance. I wrote about that pattern in hidden tech costs</a>, and storage is one of the worst offenders.
Questions I Get Asked Most
Can I install more than one NVMe SSD?
Yes, and how to install an NVMe M.2 SSD does not change for the second one. Most current desktop motherboards have two to four M.2 slots, and running a fast boot drive plus a cheaper bulk drive is a smart setup. Read the manual first, because secondary slots often run at reduced lanes or switch off SATA ports when you use them.
Do I need Gen 5 speeds in 2026?
Only for sustained heavy writes such as long 4K exports or big dataset work. For gaming, browsing, Office and photo editing, a good Gen 4 drive feels the same and runs cooler, which is why my top pick is Gen 4. If you want the full ranking, see Best NVMe SSDs 2026.
Will my older laptop support an NVMe drive?
If it has an M.2 slot, probably, but check two things: whether the slot is NVMe or SATA-only (some 2016 to 2018 machines are SATA-only and an NVMe drive simply will not appear), and the supported length, since 2242 and 2230 slots cannot take a standard 2280 drive. The service manual or a quick search for your exact model number settles both in a minute.
Buy Once, Buy Right: The Bottom Line
Tight budget: the Samsung 990 EVO Plus, a five-year warranty and a boot drive that will feel instant next to anything mechanical.
Most people: the WD Black SN850X 2TB, cool, proven, and fast in the ways you actually notice.
Editors and Gen 5 boards: the WD Black SN8100 2TB, or the Crucial P510 if you want Gen 5 numbers with less heat in a laptop.
All five drives sit together in my Amazon storefront, and how to install an NVMe M.2 SSD is still five steps and one screw.
Budget Pick
Samsung 990 EVO Plus 1TB
A first NVMe upgrade on a tight budget, replacing a hard drive or an old SATA SSD
Key specs
- PCIe Gen 4 x4 or Gen 5 x2 interface support, M.2 2280
- Up to 7,250 MB/s sequential read (manufacturer)
- Capacities: 1TB, 2TB, 4TB
- 5-year limited warranty
Reasons to buy
- Feels instant next to any mechanical drive
- Cheapest Samsung drive I would still use as a boot drive
- Flexible interface support suits older and newer boards
Reasons to avoid
- DRAM-less, so big sustained writes slow down noticeably
- Slower than the SN850X in random-read heavy testing
- Not the drive to buy if you plan heavy creative work
The picks above are collected in my Amazon storefront, so you are not hunting model numbers across five tabs.
Related guides
- SSD vs HDD in 2026: Which Drive Is Worth Your Money
- Best NVMe SSD 2026: 5 Gen4 and Gen5 Picks Ranked
- Storage Calculator 2026: How Much Space You Actually Need
- HDD or SSD for Games and Backups Worth Buying 2026
