SSD family comparison · Updated July 27, 2026 · Prices verified July 27, 2026

Lexar NM790 vs WD_BLACK SN7100

Lexar NM790 vs WD_BLACK SN7100 at every capacity: prices, $/TB, speeds, endurance. Which to buy in July 2026 — full family comparison.

Verdict: Lexar NM790 vs WD_BLACK SN7100

Lexar NM790 and WD_BLACK SN7100 compete at every capacity where both are sold, so the real question isn't a single price tag — it's which family gives you more per terabyte at the capacity you actually need. The table below breaks that down.

Peak sequential read favors the Lexar NM790 at 7,400 MB/s against 7,000 MB/s. For gaming and general desktop use the difference is imperceptible; for large-file work it's measurable.

The Lexar NM790 family is the value pick — $127.50/TB at its cheapest configuration versus $142.50/TB for the WD_BLACK SN7100. The WD_BLACK SN7100 has to win on features (cache, endurance, brand support) to justify its premium.

Lexar NM790 vs WD_BLACK SN7100: price by capacity

Capacity	Lexar NM790	WD_BLACK SN7100
2 TB	$310 · $155.00/TB	$290 · $145.00/TB	Full comparison →
4 TB	$510 · $127.50/TB	$570 · $142.50/TB	Full comparison →

Spec comparison (4 TB models)

Generation

Gen 4

Interface

PCIe 4.0 x4

Sequential read

7,400 MB/s

7,000 MB/s

Sequential write

6,500 MB/s

6,700 MB/s

Controller

MAP1602

SanDisk A101

DRAM cache

No (HMB)

Warranty

5 years

PS5 compatible

Yes

FAQ

Lexar NM790 vs WD_BLACK SN7100 — common questions

Which is cheaper per TB, Lexar NM790 or WD_BLACK SN7100?

As of July 27, 2026, the Lexar NM790 family offers the better $/TB: its best configuration is $127.50/TB versus $142.50/TB for the WD_BLACK SN7100. The exact winner varies by capacity — see the capacity table for per-size pricing.

Which capacity of the Lexar NM790 or WD_BLACK SN7100 should I buy?

2 TB is the sweet spot for most builds: better $/TB than 1 TB and better availability than 4 TB+ during the 2026 NAND shortage. Check the capacity table above — the per-TB winner can flip between capacities.

Are the Lexar NM790 and WD_BLACK SN7100 PS5 compatible?

Both families are PCIe NVMe M.2 2280 and work in the PS5 expansion slot. The PS5 caps sustained speeds at ~5,500 MB/s, so pick on price, not peak speed, and add a heatsink.