Lexar NM800 PRO 1 TB Review — PCIe 4.0 NVMe SSD
The Lexar NM800 PRO 1 TB is one of the cleanest top-of-Gen-4 picks at 1 TB \xe2\x80\x94 a DRAM-equipped TLC drive built on the Innogrit Rainer controller with a 7,500 MB/s read ceiling.
The Lexar Professional NM800 PRO 1 TB is Lexar’s flagship consumer PCIe 4.0 NVMe drive, built around the 12 nm Innogrit Rainer IG5236 — an eight-channel controller — paired with 3D TLC NAND and a dedicated DDR4 DRAM cache. The PCB is a single-sided M.2 2280 design, and Lexar sells it in two configurations: a bare drive (LNM800P001T-RNNNG) and an integrated-heatsink variant (LNM800P001T-RNHNG) with a low-profile finned aluminium block aimed at PS5 and high-end desktop use.
At 1 TB the NM800 PRO hits the family’s headline 7,500 MB/s rated sequential reads but trades a small amount of write speed and random IOPS versus the 2 TB sibling: 6,300 MB/s rated writes against 6,500 MB/s on the 2 TB, and 1,000,000 random read IOPS against 1,300,000. The closest direct rivals at this capacity and tier are the Samsung 990 Pro 1 TB (in-house TLC, DRAM, similar Gen 4 ceiling), the WD Black SN850X 1 TB (Sandisk in-house TLC, DRAM, PS5-certified heatsink SKU), and the ADATA Legend 960 1 TB (Silicon Motion SM2264, Micron 176-layer TLC). The NM800 PRO’s case is the well-regarded Innogrit Rainer’s cool thermal profile and a competitive 1,000 TBW endurance figure; its weakness against the 990 Pro is firmware-feature breadth.
The drive is a fit for desktop PCIe 4.0 builds, modern laptops with a single-sided M.2 slot, and the PS5 expansion bay where it clears Sony’s sequential-read threshold by a wide margin. Independent reviewers consistently note the NM800 PRO runs cooler than most flagship Gen 4 drives at this performance level — a side effect of the Innogrit Rainer’s 12 nm process and the single-sided PCB.
✅ Storage Comparisons:
🚀 Performance and benchmarks
Lexar rates the NM800 PRO 1 TB at up to 7,500 MB/s sequential reads and 6,300 MB/s sequential writes on a PCIe 4.0 x4 link, with random IOPS of up to 1,000,000 reads and 1,100,000 writes. Those numbers put it at the very top of the Gen 4 envelope on sequential reads — measurably ahead of the Samsung 990 Pro 1 TB on the rated number, and matched only by the ADATA Legend 960 1 TB and the Crucial T500 1 TB. On real-world Windows benchmarks the NM800 PRO sits inside the top five Gen 4 drives across game-load, DirectStorage, and creator-suite tests.
Lexar NM800 PRO 1 TB vs M.2 4.0 x 4 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 4.0 x 4 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- Lexar NM800 PRO 1 TB (this drive): 7,500 MB/s read, 6,300 MB/s write
- PNY XLR8 CS3140 1 TB: 7,500 MB/s read, 5,650 MB/s write
- PNY XLR8 CS3140 2 TB: 7,500 MB/s read, 6,850 MB/s write
- Asgard AN4 512 GB: 7,500 MB/s read, 5,500 MB/s write
- Asgard AN4 1 TB: 7,500 MB/s read, 5,500 MB/s write
The sustained-write story is the usual 1 TB caveat: the dynamic SLC cache is smaller than on the 2 TB sibling, and independent reviewers consistently find sustained writes drop noticeably partway through 300-plus-gigabyte continuous transfers, settling into roughly the 1 to 1.5 GB/s range once the cache exhausts. For everyday Windows use, gaming, OS work, and most photo or audio production that does not matter. For video editors writing multi-hundred-gigabyte project dumps in one continuous pour, the 2 TB NM800 PRO — with a larger SLC cache and the full 6,500 MB/s rated write — is the better tool. The Rainer’s thermal profile keeps the throttle threshold further away than on most flagship Gen 4 drives.
🖥️ Endurance and warranty
Lexar rates the NM800 PRO 1 TB at 1,000 TBW (terabytes written) over a 5-year limited warranty, whichever limit is reached first. That is a strong TLC endurance figure for the 1 TB capacity \xe2\x80\x94 ahead of the Samsung 990 Pro 1 TB\xe2\x80\x99s 600 TBW and the WD Black SN850X 1 TB\xe2\x80\x99s 600 TBW \xe2\x80\x94 and corresponds to roughly 550 GB of host writes every single day for the full warranty window, far beyond what an ordinary gamer or creator generates. At a more realistic 30 GB/day workload the rated endurance corresponds to over 90 years of nominal life before the counter is exhausted. Lexar publishes an MTBF figure of 1.5 million hours, which is a statistical population metric rather than a guaranteed lifespan for any individual drive. Warranty service is handled directly via Lexar RMA with proof of purchase. The TBW scales with capacity inside the family: 2,000 TBW at 2 TB.
📊 Specs
| Category | Value |
|---|---|
| Capacity [?] | 1 TB |
| Interface [?] | M.2 4.0 x 4 |
| Controller [?] | Innogrit Rainer IG5236 |
| Memory type [?] | 3D TLC |
| DRAM [?] | DRAM Cache |
| Read speed (MB/s) [?] | 7500 |
| Write speed (MB/s) [?] | 6300 |
| Read IOPS [?] | 1000000 |
| Write IOPS [?] | 1100000 |
| Endurance (TBW) [?] | 1000 |
| MTBF (million hours) [?] | 1.5 |
| Warranty (years) [?] | 5 |
Conclusion
The Lexar NM800 PRO 1 TB is the right pick if you want a top-tier Gen 4 NVMe with a top-of-class 7,500 MB/s rated read, a strong 1,000 TBW endurance rating, and a controller (Innogrit Rainer) that runs cooler than most of its rivals. Skip it if you specifically need the absolute highest random read IOPS at this capacity \xe2\x80\x94 a Samsung 990 Pro 1 TB has a small edge there \xe2\x80\x94 or if you need the largest possible SLC cache for sustained creator writes, where the 2 TB NM800 PRO is the better fit. The closest direct alternative is the Samsung 990 Pro 1 TB or WD Black SN850X 1 TB; the ADATA Legend 960 1 TB is the cleaner step-down on price with similar architecture. For a single 1 TB flagship Gen 4 drive in a PS5 or a 2026 gaming desktop, the NM800 PRO 1 TB is one of the easiest mid-tier-flagship recommendations on the market.
+ Pros
- 7,500 MB/s sequential reads on PCIe 4.0
- 1,000 TBW endurance with 5-year warranty
- Innogrit Rainer IG5236 runs cool under load
- Dedicated DDR4 DRAM cache on board
- Single-sided M.2 2280 fits laptops and PS5
- Heatsink SKU available for thermal headroom
- Cons
- 6,300 MB/s writes trail the 2 TB sibling
- 1 TB SLC cache smaller for sustained writes
- Limited firmware-tuning utility on Windows
- Random read IOPS below 990 Pro 1 TB
- Bare PCB needs aftermarket cooling for PS5
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✨ Video Review
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