SSD family comparison · Updated September 7, 2026 · Prices verified September 7, 2026

Samsung 990 PRO vs WD_BLACK SN850X

Samsung 990 PRO vs WD_BLACK SN850X at every capacity: prices, $/TB, speeds, endurance. Which to buy in September 2026 — full family comparison.

Verdict: Samsung 990 PRO vs WD_BLACK SN850X

Samsung 990 PRO and WD_BLACK SN850X 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 Samsung 990 PRO at 7,450 MB/s against 7,300 MB/s. For gaming and general desktop use the difference is imperceptible; for large-file work it's measurable.

The WD_BLACK SN850X family is the value pick — $164.75/TB at its cheapest configuration versus $194.50/TB for the Samsung 990 PRO. The Samsung 990 PRO has to win on features (cache, endurance, brand support) to justify its premium.

Samsung 990 PRO vs WD_BLACK SN850X: price by capacity

Capacity	Samsung 990 PRO	WD_BLACK SN850X
1 TB	$240 · $240.00/TB	$249 · $249.00/TB	Full comparison →
2 TB	$389 · $194.50/TB	$390 · $195.00/TB	Full comparison →
4 TB	$982 · $245.50/TB	$659 · $164.75/TB	Full comparison →
8 TB	—	$1598 · $199.75/TB

Spec comparison (4 TB models)

Generation

Gen 4

Interface

PCIe 4.0 x4

Sequential read

7,450 MB/s

7,300 MB/s

Sequential write

6,900 MB/s

6,600 MB/s

Controller

Samsung Pascal

WD G2

DRAM cache

Yes

Warranty

5 years

PS5 compatible

Yes

FAQ

Samsung 990 PRO vs WD_BLACK SN850X — common questions

Which is cheaper per TB, Samsung 990 PRO or WD_BLACK SN850X?

As of September 7, 2026, the WD_BLACK SN850X family offers the better $/TB: its best configuration is $164.75/TB versus $194.50/TB for the Samsung 990 PRO. The exact winner varies by capacity — see the capacity table for per-size pricing.

Which capacity of the Samsung 990 PRO or WD_BLACK SN850X 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 Samsung 990 PRO and WD_BLACK SN850X 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.