A By taking a combination of speed readings with a strong emphasis on deep queue depth (server) IO.
The AS-SSD Total Score is derived from various speed measurements taken by the AS-SSD benchmarking utility. The purpose of the score is to summarize the performance characteristics of an SSD. It is calculated as follows:

Total Score = SeqW*0.15 + SeqR*0.1 + 4kR*2 + 4kW + 4k64W + 4k64R*1.5
  • SeqR = Sequential read speed
  • 4kR = Random 4k read speed
  • 4k64R = Random 4k read speed (64 queue depth)
All speeds are measured in MBps.

The SSD Group Test average scores are as follows:
  • SeqR=488
  • SeqW=362
  • 4kR=25
  • 4kW=83
  • 4k64R=276
  • 4k64W=250
So the total score is weighted in the below proportions:
  • SeqR=5%
  • SeqW=6%
  • 4kR=6%
  • 4kW=9%
  • 4k64R=46%
  • 4k64W=28%
This indicates a very heavy bias on 64 deep queue depth performance. Drives that score well on this test will perform excellently when faced with IO heavy server workloads such as hosting database engines or participating in busy storage area networks.

The Best.
CPUGPUSSD
AMD Ryzen 5 1600 $170Nvidia GTX 1070 $440Samsung 850 Evo 250GB $104
Intel Core i7-8700K $320Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $122
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $121
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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