Samsung 9100 PRO 4TB ($769) vs Samsung 990 EVO Plus 4TB ($419). $/TB analysis, performance, and use-case recommendations.
Samsung 9100 PRO 4TB and Samsung 990 EVO Plus 4TB are direct competitors — same generation, same capacity. Choose by controller behavior under sustained load, DRAM/HMB cache strategy, and $/TB economics.
Hardware-wise, the Samsung 9100 PRO 4TB runs on the proprietary Samsung Presto silicon found only in the 9100 PRO line. The Samsung 990 EVO Plus 4TB pairs Samsung's Piccolo — a DRAM-less controller with flexible PCIe generation support.
The cost difference is hard to ignore: 46% per TB (Samsung 990 EVO Plus 4TB at $104.75/TB versus Samsung 9100 PRO 4TB at $192.25/TB). Unless you specifically need the Samsung 9100 PRO 4TB's peak performance, the Samsung 990 EVO Plus 4TB delivers more storage for the money.
In the read department, the Samsung 9100 PRO 4TB leads by roughly 7 GB/s. The difference is more academic than practical for typical use, but it does matter for video editors moving multi-GB project files.
Write performance separates them too. The Samsung 9100 PRO 4TB sustains 13,400 MB/s writes versus 6,300 MB/s for the Samsung 990 EVO Plus 4TB — a real advantage for video editors and anyone doing heavy file operations.
Cache architecture differs: Samsung 9100 PRO 4TB has DRAM hardware, Samsung 990 EVO Plus 4TB uses HMB. For OS, gaming, browsing — indistinguishable. For databases, large file ops, or 4K video editing — DRAM has a small but consistent edge.
For PS5 expansion, both are PCIe Gen 4 M.2 2280 drives that meet Sony's minimum spec (7,250 MB/s read). The console can't take advantage of speeds beyond that, so save money by choosing the Samsung 990 EVO Plus 4TB. For content creators routinely rendering 4K or 8K video, the Samsung 9100 PRO 4TB's 13,400 MB/s sustained write is the deciding factor — multi-GB project files land noticeably faster than on the alternative. Note for handheld gamers: M.2 2280 is the desktop/laptop standard. Steam Deck and the ROG Ally line need 2230 drives — neither Samsung 9100 PRO 4TB nor Samsung 990 EVO Plus 4TB fits without modification.
The Samsung 9100 PRO 4TB is the right call if meaningfully faster reads (14,800 MB/s), higher sustained writes (13,400 MB/s), and a dedicated DRAM cache chip 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).
The Samsung 990 EVO Plus 4TB is the right call if the lower retail price ($419 vs $769), and better $/TB economics ($104.75/TB) matter to you. Samsung designed the 990 EVO Plus around the Piccolo controller's dual-PCIe support — a hedge against both Gen 4 holdouts and Gen 5 early adopters.