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Models with the most samples
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Storage performance
Sequential read
MiB/s · higher is fasterB is 0.25% higher than A
Sequential write
MiB/s · higher is fasterB is 194.62% higher than A
4 KiB random read
MiB/s · higher is fasterB is 35.93% higher than A
4 KiB random write
MiB/s · higher is fasterB is 3.95% lower than A
Configuration details
| Detail | A · PM991a NVMe Samsung 512GB · 476 GB | B · NVMe SAMSUNG MZVLB256 SCSI Disk Device · 238 GB |
|---|---|---|
| Platform | Windows | Windows |
| Sample count | 3 | 1 |
| Latest measurement | 2023-08-29 | 2026-04-11 |
| Random read IOPS | 7,374 | 10,024 |
| Random write IOPS | 15,854 | 15,227 |
| All capacities | View Model → | View Model → |
Results checked · Speeds in MiB/s · About these measurements
Four tests. A clearer comparison.
Compare sequential and 4 KiB random read/write speeds side by side. Every option includes its Model, capacity and platform. You can compare 512 GB with 256 GB, including two capacities of the same Model.