Kioxia XG8 (OEM) 1 TB vs WD SN530 (OEM) 512 GB
Short answer: which is best?
Kioxia XG8 (OEM) 1 TB is 124.1 % stronger than WD SN530 (OEM) 512 GB. Kioxia XG8 (OEM) 1 TB ranks #18 of 54 measured system drives at WhatFPS (10,885 Drive score over 1 verified runs). WD SN530 (OEM) 512 GB ranks #49 of 54 measured system drives at WhatFPS (4,858 Drive score over 2 verified runs). The numbers are measured in 3 verified WhatFPS runs — not estimated, not self-reported.
Measured comparison
| Metric | Kioxia XG8 (OEM) 1 TB | WD SN530 (OEM) 512 GB |
|---|---|---|
| Drive score (the drive's own performance: sequential read + 4K IOPS) | 10,885 | 4,858 |
| Best rig (GAMING — whole PC) | 1,559 | 1,103 |
| Sequential read | 3,158 MB/s | 1,267 MB/s |
| 4K IOPS | 13,170 | 6,561 |
| 4K latency, median (lower is better) | 59 µs | 162 µs |
| Type | NVMe SSD | NVMe SSD |
| Size | 1 TB | 512 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 Kioxia XG8 (OEM) 1 TB · All measurements for WD SN530 (OEM) 512 GB