Average Bench: 184% (59th of 955)

Based on 4,510 user benchmarks.  Models: SAMSUNG MZHPV256HDGL-00000, SAMSUNG MZHPV256HDGL-000L1

Outstanding average bench

The Samsung SM951 AHCI PCIe M.2 256GB averaged 84.3% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Samsung SM951 AHCI PCIe M.2 256GB near the top of the comparison list.


Avg. Sequential Read Speed 1,658MB/s
Avg. Sequential Mixed IO Speed 1,115MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Samsung SM951 AHCI PCIe M.2 256GB is 96.4%. This is a particularly wide range which indicates that the Samsung SM951 AHCI PCIe M.2 256GB performs inconsistently under varying real world conditions.


Avg. 4K-64Thread Read Speed 261MB/s
Avg. 4K-64Thread Write Speed 242MB/s

Average Bench

(Based on 4,510 samples)
Min Avg Max
757 Read 1,658 1,990
578 Write 968 1,219
625 Mixed 1,115 1,436
293 SusWrite 763 1,166
251% 1,126 MB/s
Min Avg Max
23.2 4K Read 40.7 44.8
43.8 4K Write 102 139
20.4 4K Mixed 36.8 52.4
163% 60 MB/s
Min Avg Max
30.7 DQ Read 261 690
83.6 DQ Write 242 375
20.4 DQ Mixed 136 499
134% 213 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
186GB free
Firmware: BXW2500Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 1201 1201 1199 1204 1200 1200 MB/s
Read 1,420
Write 1,202
Mixed 846
SusWrite 1,201
262% 1,167 MB/s
4K Read 33.5
4K Write 87.3
4K Mixed 45
155% 55.3 MB/s
DQ Read 364
DQ Write 344
DQ Mixed 351
264% 353 MB/s
201GB free (System drive)
Firmware: BXW25L0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 1019 962 1091 1181 1202 1109 MB/s
Read 1,252
Write 1,242
Mixed 722
SusWrite 1094
242% 1,078 MB/s
4K Read 39.9
4K Write 93.3
4K Mixed 49.8
174% 61 MB/s
DQ Read 534
DQ Write 343
DQ Mixed 449
332% 442 MB/s
4,510 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 7,537,239 SSDs tested.


AmazonUS $22018 mins
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EDIT WITH CUSTOM PC BUILDER Value: 100% - Outstanding Total price: $220

Popular SM951 AHCI PCIe M.2 256GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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  • - CPU tests include: integer, floating and string.
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Solid State Drive Rankings (Price vs Performance) July 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.


955 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i7-8700K $320Nvidia GTX 1070 $410Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $289Samsung 850 Evo 500GB $121
Intel Core i5-8600K $235AMD RX 480 $280Samsung 850 Pro 256GB $160
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $176SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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