Compare Samsung 990 PRO 2TB and WD_BLACK SN850X 1TB: prices, speeds, $/TB. Which to buy in May 2026? Full spec breakdown.
Both run on Gen 4 hardware but at different capacities: 2 TB for the Samsung 990 PRO 2TB versus 1 TB for the WD_BLACK SN850X 1TB. 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 2TB runs on Samsung's 8nm Pascal controller, the silicon powering the 990 PRO line. The WD_BLACK SN850X 1TB pairs the proprietary WD G2 silicon, optimized for the WD_BLACK line.
On warranty endurance the Samsung 990 PRO 2TB carries 1,200 TBW against WD_BLACK SN850X 1TB's 600 TBW. Both will outlast typical use, but the gap matters if you're doing professional content work.
For PlayStation 5 builds, the console's internal M.2 slot tops out around 5,500 MB/s sustained, so both Samsung 990 PRO 2TB and WD_BLACK SN850X 1TB hit the same wall — pick whichever is cheaper at the moment you buy. Heavy write workloads — video editing, RAW photo libraries, backup operations — favor the Samsung 990 PRO 2TB's 6,900 MB/s sustained write speed. Both drives use the 2280 form factor, which is too long for Steam Deck or ROG Ally — you'd need a 2230 variant if either manufacturer offers one, or a dedicated handheld-format drive instead.
Pick the Samsung 990 PRO 2TB if you value better $/TB economics ($109.50/TB), and a higher TBW endurance rating (1,200 TBW). Samsung's PRO line has the longest track record for firmware reliability — over a decade of consumer SSDs with global RMA support.
Pick the WD_BLACK SN850X 1TB if you value the lower retail price ($119 vs $219). WD_BLACK's SN850X earned its reputation through consistent sustained performance under gaming workloads — fewer micro-stutters during open-world streaming than budget alternatives.