Samsung 990 PRO 1 TB vs SK hynix SC311 SATA 256GB
Short answer: which is best?
Samsung 990 PRO 1 TB is 439.5 % stronger than SK hynix SC311 SATA 256GB. Samsung 990 PRO 1 TB ranks #6 of 63 measured system drives at WhatFPS (15,510 Drive score over 1 verified runs). SK hynix SC311 SATA 256GB ranks #59 of 63 measured system drives at WhatFPS (2,875 Drive score over 1 verified runs). The numbers are measured in 2 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Samsung 990 PRO 1 TB | SK hynix SC311 SATA 256GB |
|---|---|---|
| Drive score (the drive's own performance: sequential read + 4K IOPS) | 15,510 | 2,875 |
| Best rig (GAMING — whole PC) | 11,193 | 7,406 |
| Sequential read | 4,194 MB/s | 496 MB/s |
| 4K IOPS | 20,133 | 5,850 |
| 4K latency, median (lower is better) | 41 µs | 160 µs |
| Type | NVMe SSD | SATA SSD |
| Size | 1 TB | 256 GB |
What the numbers mean
The drive score is the system drive's measured performance in the rigs it sat in — sequential read and 4K IOPS, unbuffered. PCIe generation, fill level and driver affect it. GAMING is the whole rig's score. We show both and never mix them.
All numbers come from our benchmark suite, the same test on every PC, written in Rust with no middleware. The methodology is open at https://whatfps.com/metodik
All measurements for Samsung 990 PRO 1 TB · All measurements for SK hynix SC311 SATA 256GB