How is the performance score determined?
The SSD score summarizes the measured performance into a single, easy-to-compare number.
Originally, the score was calculated using the AS SSD Benchmark application. Since summer 2026, our own SSD testing application has been used instead. As a result, the calculation has changed slightly.
The current SSD-Tester score
The 4K random values are intentionally weighted more heavily because they better reflect perceived everyday performance than maximum sequential speed.
What do the benchmark results mean?
Sequential 1 MiB (Q8T1)
Large, contiguous 1 MiB blocks with eight outstanding operations on a single thread. Important when copying large files, editing videos, and creating backups.
4K Random (Q32T16)
Tiny 4 KB blocks at random locations. This value shows performance under many simultaneous accesses, such as on servers or during heavy multitasking.
4K Random (Q1T1)
A single 4 KB operation at a time. The response time determines how responsive Windows and applications feel in everyday use.
Show previous AS SSD formula
Read Score: Sequential Read Speed × 0.1 + 4K Read Speed + 4-64Thrd Read Speed
Write Score: Sequential Write Speed × 0.1 + 4K Write Speed + 4-64Thrd Write Speed
Total Score: Sequential Write Speed × 0.15 + Sequential Read Speed × 0.1 + 4K Read Speed × 2 + 4K Write Speed + 4-64Thrd Write Speed + 4-64Thrd Read Speed × 1.5