Four NVMe SSDs that turn a tired old laptop into something that boots in twelve seconds. Picks for Gen 4, Gen 3, premium, and budget — plus how to know which one fits your machine.
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Upgrading a slow laptop's hard drive (or old SATA SSD) to a modern NVMe is one of the highest-impact, lowest-cost computer upgrades you can do. Boot times drop from 60-90 seconds to 10-15. App launches go from 'wait' to 'instant.' For roughly $80-150 in parts, you turn a frustrating computer back into a usable one — usually buying yourself another 2-3 years before you need to replace the whole machine.
I do this upgrade weekly for customers. The labor is straightforward (about an hour including data migration), the parts cost is predictable, and the performance gain is dramatic enough that customers consistently tell me their 'old' laptop now feels faster than their work computer.
But — and this matters — picking the wrong NVMe drive wastes money. Putting a Gen 4 drive in a Gen 3 laptop gets you Gen 3 performance at Gen 4 prices. Buying a premium 990 Pro for a casual user gets them performance they'll never see. Buying a budget P3 Plus for a content creator's primary drive sets them up for endurance-rating problems three years out. Match the drive to the use case.
Two things to check before buying: what generation your laptop's M.2 slot is (CrystalDiskInfo on Windows, System Information on Mac), and whether it's M.2 NVMe or M.2 SATA. The two slots look almost identical but require different drives. Get the slot wrong and the laptop won't boot.
The picks
What I install in customer machines.
Pick 01 · Best Value (Gen 4)
WD Black SN770 (Gen 4, best value)
4.7 / 5·DX·03A
InterfacePCIe Gen 4 x4
Capacities500 GB, 1, 2 TB
Read speed5,150 MB/s
DRAM cacheNone (HMB)
Typical price~$60-130
If you're upgrading a laptop from 2021 or newer, this is the drive I'd put in. Gen 4 speeds, sensible price, runs cool enough that it doesn't need a heatsink (which matters because most laptops don't have room for one). The SN770 has been one of the most consistently-recommended NVMe drives in PC building communities for two years running, and the reason is durability — WD's controller has been remarkably reliable across the manufacturing lifecycle.
It's a DRAM-less drive (uses host memory buffer instead), which sounds like a downside but isn't for the upgrade use case. HMB performance is excellent for typical desktop and laptop workloads. Where DRAM matters is sustained heavy writes — content creators rendering hours of video, database servers, that kind of thing. For 'I want my laptop to boot faster and apps to open instantly,' this is the pick.
What you give up: peak burst speed (the Samsung 990 Pro reaches 7,450 MB/s), sustained write performance under heavy load, and 5-year warranty (the SN770 is 5-year too actually — never mind). The price difference versus the 990 Pro is $50-80 depending on capacity, and 95% of users won't notice the speed difference.
⚠ Field note
Check your laptop's M.2 slot before buying. Some laptops only support PCIe Gen 3 — putting a Gen 4 drive in a Gen 3 slot still works but you'll see Gen 3 speeds (about 3,500 MB/s instead of 5,150). Run CrystalDiskInfo before buying to verify the slot generation. If you have Gen 3, save money and get the Samsung 970 EVO Plus below instead.
Strong points
Excellent value for Gen 4 performance
Runs cool — no heatsink needed
5-year warranty
Reliable WD controller, low failure rate
Multiple capacities including budget-friendly 500GB
Real-world drawbacks
DRAM-less (HMB) — slower under sustained heavy writes
No included heatsink for desktops
Slightly slower than premium Gen 4 drives in synthetic benchmarks
If your work involves sustained heavy write loads — video rendering, virtual machines, large database operations, hosting Steam libraries with many active games — the 990 Pro earns its premium. It has DRAM cache (most modern drives skip this), Samsung's most advanced controller, and the highest endurance rating in this class (1,200 TBW for the 1TB version vs. 600 TBW for the SN770).
Real-world: this is the drive that doesn't slow down under sustained write pressure. After 30 minutes of continuous heavy writes, most NVMe drives drop from 5,000+ MB/s to under 2,000 MB/s as the SLC cache fills up. The 990 Pro's larger cache and DRAM management keep it faster for longer. For everyday computing, you won't notice. For pro workflows, the difference is hours of work over a year.
What's worth knowing: the 990 Pro had documented firmware issues at launch in 2023 with health rating dropping unexpectedly. Samsung released firmware 1B2QJXD7 in early 2024 that fixed it, and drives shipped since mid-2024 have the fixed firmware from the factory. If you're buying new today, you're getting the fixed version. But if you see a 990 Pro listed as 'open box' or older inventory, check the firmware before deploying.
⚠ Field note
Worth the premium only if you'll actually use the performance. For 'my laptop boots slow' or 'apps take forever to open,' the WD SN770 above is identical in real-world feel. The 990 Pro pays off when you're doing sustained 4K/8K video work, hosting VMs, or running database workloads that the SN770 chokes on.
Sometimes you don't need the best drive. You need a drive — a 1TB upgrade for your kid's laptop, a secondary game library drive, an upgrade path for a 7-year-old desktop that's still running fine but out of space. The Crucial P3 Plus fits that role. It's noticeably cheaper than the SN770 (often $20-30 less at the 1TB capacity), and for non-demanding workloads the speed difference is invisible.
Crucial gets the same NAND as their parent company Micron uses in enterprise drives, so the storage cells themselves are reliable. The trade-off versus the SN770 is in the controller — Crucial's Phison E21T is competent but doesn't manage sustained writes as well. If you fill the drive 90%+ full and then write a 50GB file, you'll see speeds drop to 1,200 MB/s as the SLC cache exhausts. That's still fine, just not Gen 4 fast.
What you give up: top-end performance, slightly lower endurance rating (220 TBW for the 1TB vs. 600 TBW for the SN770), and a 5-year warranty (P3 Plus is also 5-year, scratch that). For the price difference, those tradeoffs are reasonable for the secondary-drive use case.
⚠ Field note
Don't buy this for your primary system drive on a heavy-use computer. The endurance rating is low enough that I've seen P3 Plus drives reach 50% wear after 3-4 years on a primary drive in a development workstation. For a secondary drive or low-write usage, it's fine. For your main drive on a daily-use computer, spend the extra $20 for the SN770.
If your laptop is from 2020 or earlier, there's a good chance its M.2 slot is PCIe Gen 3, not Gen 4. Putting a Gen 4 drive in a Gen 3 slot works fine, but the drive caps at Gen 3 speeds (about 3,500 MB/s instead of 5,000+). At that point you're paying premium for performance you can't access — which is exactly when the 970 EVO Plus makes sense.
Samsung kept this drive in production for an unusually long time (5+ years now) because it's the gold standard for Gen 3. DRAM cache, mature firmware, excellent reliability track record, and Samsung Magician for health monitoring. I've installed dozens of these in customer machines and seen exactly two failures in five years — both within the warranty period.
For the typical 'my laptop is slow, can you make it faster' service call, this is what I install. The customer's old SATA SSD or HDD gets cloned to this drive, the laptop gets meaningfully snappier (boot times typically drop from 45-90 seconds to 10-15), and the cost is $60-100 depending on capacity. It's the most reliable upgrade I do.
⚠ Field note
Verify your laptop has an M.2 NVMe slot before buying — not just M.2 SATA. Some 2017-2019 laptops have M.2 slots that only accept SATA SSDs. The two are physically similar but electrically different. If you put an NVMe drive in a SATA-only M.2 slot, the laptop won't boot. Check your laptop model's spec sheet, or run CrystalDiskInfo on the existing drive to see what type it is.
Strong points
DRAM cache — better sustained performance than DRAM-less drives
Mature, proven firmware (5+ year track record)
Samsung Magician health monitoring
Excellent reliability — very low failure rate
Right pick for older Gen 3-only laptops
Real-world drawbacks
Wasted in Gen 4 systems (caps at Gen 3 speed)
Older design — Samsung has stopped optimizing it
Slightly more expensive than competing Gen 3 drives
These ratings reflect what I've seen in actual deployment, not synthetic benchmark numbers. The SN770 earned the highest because it has the lowest failure rate I've personally tracked across 50+ installs in the past two years. The 990 Pro is a slightly better drive in absolute terms, but its launch firmware issues kept the rating at 4.6 even though current production is solid.
Sources I weighted: ServeTheHome and TweakTown sustained-write testing, my own service records and customer feedback, Reddit's r/buildapc long-term ownership reports, and AnandTech reviewer findings (where available — RIP).
DX·03 — Issue 03 — NVMe upgrades — Computer Medic Repair & Service LLC, Clearwater FL — Published April 2026