Side-by-side: Samsung 9100 PRO 1TB ($280) vs Samsung 990 PRO 1TB ($135). $/TB winner, specs, real-world picks for May 2026.
This is a generational matchup at 1 TB: the older-gen drive offers proven reliability and better $/TB, while the newer-gen sibling brings raw bandwidth that most users never tap.
Hardware-wise, the Samsung 9100 PRO 1TB runs on Samsung's in-house Presto controller, designed specifically for the 9100 PRO series. The Samsung 990 PRO 1TB pairs the in-house Samsung Pascal — engineered specifically for the 990 PRO at 8nm.
Money matters here — $135.00/TB on the Samsung 990 PRO 1TB versus $280.00/TB on the Samsung 9100 PRO 1TB. That's enough of a spread that for budget-conscious builders, the Samsung 990 PRO 1TB becomes the default unless reviews of your specific workload prefer the Samsung 9100 PRO 1TB.
Read speeds favor the Samsung 9100 PRO 1TB: 14,700 MB/s versus 7,450 MB/s for the Samsung 990 PRO 1TB, a 49% advantage. Sequential-heavy workloads notice; transactional workloads don't.
The Samsung 9100 PRO 1TB writes about 49% faster (13,400 MB/s vs 6,900 MB/s). Whether that matters depends entirely on what you write to the drive — gameplay capture and large project saves benefit, browsing and gaming do not.
For PS5 expansion, both are PCIe Gen 4 M.2 2280 drives that meet Sony's minimum spec (7,450 MB/s read). The console can't take advantage of speeds beyond that, so save money by choosing the Samsung 990 PRO 1TB. Comparing across generations always invites the same question: does the bandwidth gap convert into user-visible improvements? Honest answer for the Samsung 9100 PRO 1TB vs Samsung 990 PRO 1TB pairing: only for sustained sequential reads of multi-GB files. Heavy write workloads — video editing, RAW photo libraries, backup operations — favor the Samsung 9100 PRO 1TB's 13,400 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.
Go with the Samsung 9100 PRO 1TB for meaningfully faster reads (14,700 MB/s), and higher sustained writes (13,400 MB/s). Samsung's PRO line has the longest track record for firmware reliability — over a decade of consumer SSDs with global RMA support.
Go with the Samsung 990 PRO 1TB for the lower retail price ($135 vs $280), and better $/TB economics ($135.00/TB). Among consumer SSD makers, Samsung's PRO series consistently scores highest on long-term reliability surveys (Backblaze, Puget Systems Q1 2026 data).