Kioxia XG10 (OEM) 1 TB vs WD Black SN850 8 TB
Short answer: which is best?
Kioxia XG10 (OEM) 1 TB is 19.1 % stronger than WD Black SN850 8 TB. Kioxia XG10 (OEM) 1 TB ranks #3 of 76 measured system drives at WhatFPS (17,026 Drive score over 1 verified runs). WD Black SN850 8 TB ranks #10 of 76 measured system drives at WhatFPS (14,297 Drive score over 1 verified runs). The numbers are measured in 2 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Kioxia XG10 (OEM) 1 TB | WD Black SN850 8 TB |
|---|---|---|
| Drive score (the drive's own performance: sequential read + 4K IOPS) | 17,026 | 14,297 |
| Best rig (GAMING — whole PC) | 11,994 | 10,156 |
| Sequential read | 5,368 MB/s | 4,129 MB/s |
| 4K IOPS | 18,955 | 17,375 |
| 4K latency, median (lower is better) | 52 µs | 49 µs |
| Type | NVMe SSD | NVMe SSD |
| Size | 1 TB | 8 TB |
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 Kioxia XG10 (OEM) 1 TB · All measurements for WD Black SN850 8 TB