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Lexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive, Up to 7400/6500 MB/s Read/Write, Compatible with PS5, for Gamers and Creators, Black (LNM790X004T-RN9NU)
Lexar

Lexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive

Bottom line: The Lexar 4TB NM790 SSD ($599.99 on Amazon as of 2026-10-07): 7400MB/s read, 6500MB/s write - saturates a PCIe Gen4 x4 slot; main trade-off: no onboard DRAM - relies on Host Memory Buffer from system RAM.

$599.99

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For SSDs and PC storage upgrades, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 7400MB/s read, 6500MB/s write - saturates a PCIe Gen4 x4 slot
  • ✓ 4TB in a single M.2 2280 stick, no second drive needed
  • ✓ 3000TBW endurance rating for heavy write workloads
  • ✓ Heatsink included, sized for desktop M.2 and PS5 expansion bays
  • ✓ Lexar lists PlayStation 5 compatibility explicitly

Cons

  • ✗ No onboard DRAM - relies on Host Memory Buffer from system RAM
  • ✗ HMB 3.0 needs host support; consoles and older boards may not provide it
  • ✗ PCIe Gen4 x4 only - no Gen5 headroom on newer boards
  • ✗ Heatsink height can conflict with tight GPU or cooler clearance

Manufacturer description

The Lexar NM790 4TB with Heatsink is a PCIe Gen4 x4 NVMe M.2 2280 drive built for people who fill capacity fast. Lexar rates it at up to 7400MB/s read and 6500MB/s write, roughly 2x the ceiling of a PCIe Gen 3 SSD, with a 3000TBW endurance rating across the 4TB capacity. Instead of an onboard DRAM cache, the NM790 uses Host Memory Buffer (HMB) 3.0 plus a Dynamic SLC Cache, borrowing a slice of your system RAM to keep sustained transfers smooth while drawing up to 40 percent less power than DRAM-cache Gen 4 drives. The bundled low-profile heatsink handles thermals in a desktop M.2 slot or a…

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SpecPicks Verdict

SpecPicks scored Lexar 4TB NM790 SSD using a rating × review-volume × price-fit model applied to published specs and reviews across the ssds & storage category. Lexar's ssds & storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for ssds & storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Does the Lexar NM790 4TB work in a PS5?

Yes. Lexar lists PlayStation 5 compatibility for the NM790 with Heatsink, and it ships in the M.2 2280 form factor the PS5 expansion bay accepts.

How fast is the Lexar NM790 4TB?

Lexar rates it at up to 7400MB/s sequential read and 6500MB/s sequential write over PCIe Gen 4 x4, which Lexar describes as about 2x a PCIe Gen 3 SSD.

Does the NM790 have a DRAM cache?

No. It uses Host Memory Buffer (HMB) 3.0 to borrow host RAM for the cache function, plus a Dynamic SLC Cache. Lexar cites up to 40 percent lower power draw than DRAM-cache Gen 4 drives as a result.

How long will the 4TB NM790 last?

The 4TB model is rated for 3000TBW (terabytes written). Lexar covers the drive with a five-year limited warranty; check the product listing for current warranty terms.

Do I need to remove the heatsink to install it?

The NM790 ships with its heatsink attached for thermal headroom in desktops and the PS5 bay. Measure clearance under your GPU or M.2 cover before installing, since the heatsink adds height to a standard 2280 stick.

Key Features

  • [4TB] Exceptional performance up to 7400MB/s read, 6500MB/s write; 3000TBW
  • 2x faster than PCIe Gen 3 SSDs
  • Designed with a heatsink to keep your rig cool for better performance and power efficiency
  • Up to 40% less power consumption than DRAM cache-enabled PCIe Gen 4 SSDs
  • Host Memory Buffer (HMB) 3.0 activates the DRAM cache function of your device for a smoother transfer speed and seamless performance
  • Compatible with PlayStation 5

Full Specifications

BrandLexar
ColorBlack
Model NameNM790
Read Speed7400 megabytes_per_second
Unit Count1 Count
Form FactorM.2 2280
Media Speed6500 megabits_per_second
Model NumberLNM790X004T-RN9NU
CompatibilityPS5
Built-In MediaSSD
Hard-Drive Size4 TB
Mfr Part NumberLNM790X004T-RN9NU
Number of Items1
Special FeatureIntegrated heatsink
Installation TypeInternal Hard Drive
Compatible DevicesDesktop, Laptop, PS5
Data Transfer Rate7400 megabytes_per_second
Enclosure MaterialNand Flash
Additional FeaturesIntegrated heatsink
Hard Disk InterfaceNVMe
Full listing titleLexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive, Up to 7400/6500 MB/s Read/Write, Compatible with PS5, for Gamers and Creators, Black (LNM790X004T-RN9NU)

Ready to buy?

Lexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive, Up to 7400/6500 MB/s Read/Write, Compatible with PS5, for Gamers and Creators, Black (LNM790X004T-RN9NU) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $599.99

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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Lexar 4TB NM790 SSD with Heatsink PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive, Up to 7400/6500 MB/s Read/Write, Compatible with PS5, for Gamers and Creators, Black (LNM790X004T-RN9NU)
$599.99
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