Samsung 9100 PRO 1TB ($280) vs Samsung 990 PRO 2TB ($219). $/TB analysis, performance, and use-case recommendations.
This pairing combines different generations and different capacities, which is less common but useful when you're balancing raw performance against storage volume. Samsung 9100 PRO 1TB is a Gen 5 drive at 1 TB; Samsung 990 PRO 2TB runs Gen 4 at 2 TB.
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 2TB pairs the in-house Samsung Pascal — engineered specifically for the 990 PRO at 8nm.
The cost difference is hard to ignore: 61% per TB (Samsung 990 PRO 2TB at $109.50/TB versus Samsung 9100 PRO 1TB at $280.00/TB). Unless you specifically need the Samsung 9100 PRO 1TB's peak performance, the Samsung 990 PRO 2TB delivers more storage for the money.
Read speeds favor the Samsung 9100 PRO 1TB: 14,700 MB/s versus 7,450 MB/s for the Samsung 990 PRO 2TB, 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.
On warranty endurance the Samsung 990 PRO 2TB carries 1,200 TBW against Samsung 9100 PRO 1TB's 600 TBW. Both will outlast typical use, but the gap matters if you're doing professional content work.
If this purchase is for a PS5 storage expansion, the comparison flattens — Sony's PCIe Gen 4 controller normalizes both Samsung 9100 PRO 1TB and Samsung 990 PRO 2TB to roughly equal in-game load times. The cheaper drive is the smart pick. The Gen 5 Samsung 9100 PRO 1TB pulls ahead on sequential bandwidth, but Gen 5 advantages rarely surface during everyday tasks — most software hasn't been rewritten to exploit 14,000+ MB/s pipelines. 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.
The Samsung 9100 PRO 1TB is the right call if meaningfully faster reads (14,700 MB/s), and higher sustained writes (13,400 MB/s) matter to you. Samsung's PRO line has the longest track record for firmware reliability — over a decade of consumer SSDs with global RMA support.
The Samsung 990 PRO 2TB is the right call if the lower retail price ($219 vs $280), better $/TB economics ($109.50/TB), and a higher TBW endurance rating (1,200 TBW) matter to you. Among consumer SSD makers, Samsung's PRO series consistently scores highest on long-term reliability surveys (Backblaze, Puget Systems Q1 2026 data).