Compare Samsung 990 PRO 1TB and WD_BLACK SN850X 2TB: prices, speeds, $/TB. Which to buy in July 2026? Full spec breakdown.
Both run on Gen 4 hardware but at different capacities: 1 TB for the Samsung 990 PRO 1TB versus 2 TB for the WD_BLACK SN850X 2TB. Whether the larger drive's $/TB advantage justifies the higher upfront cost depends on how much you actually need.
Hardware-wise, the Samsung 990 PRO 1TB runs on the in-house Samsung Pascal — engineered specifically for the 990 PRO at 8nm. The WD_BLACK SN850X 2TB pairs WD's G2 controller — manufactured by SanDisk and tuned for low-latency gaming workloads.
Price separates these two meaningfully. The WD_BLACK SN850X 2TB costs $174.00/TB versus $239.00/TB for the Samsung 990 PRO 1TB — a 27% premium that needs justification in real benchmarks, not just spec-sheet bragging.
WD_BLACK SN850X 2TB earns higher TBW ratings (1,200 vs 600 TBW) — relevant for sustained write workloads, irrelevant for everything else.
If this purchase is for a PS5 storage expansion, the comparison flattens — Sony's PCIe Gen 4 controller normalizes both Samsung 990 PRO 1TB and WD_BLACK SN850X 2TB to roughly equal in-game load times. The cheaper drive is the smart pick. Note for handheld gamers: M.2 2280 is the desktop/laptop standard. Steam Deck and the ROG Ally line need 2230 drives — neither Samsung 990 PRO 1TB nor WD_BLACK SN850X 2TB fits without modification.
Market context: the Samsung 990 PRO 1TB ranks #3 of 4 Gen 4 1 TB drives we track by $/TB, while the WD_BLACK SN850X 2TB ranks #8 of 11 Gen 4 2 TB drives. Neither is a value leader right now — if $/TB is your priority, check the cheaper alternatives below before committing.
Pick the Samsung 990 PRO 1TB if you value the lower retail price ($239 vs $348). Among consumer SSD makers, Samsung's PRO series consistently scores highest on long-term reliability surveys (Backblaze, Puget Systems Q1 2026 data).
Pick the WD_BLACK SN850X 2TB if you value better $/TB economics ($174.00/TB), and a higher TBW endurance rating (1,200 TBW). Among Gen 4 flagships, the SN850X strikes a sweet spot — premium silicon at sub-Samsung pricing, with WD's established RMA process to back it up.