Average Bench: 179% (86th of 1011)

Based on 5,222 user benchmarks.  Models: SAMSUNG MZHPV256HDGL-00000, SAMSUNG MZHPV256HDGL-000L1

Outstanding average bench

The Samsung SM951 AHCI PCIe M.2 256GB averaged 78.9% 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. 4K-64Thread Mixed IO Speed 457MB/s
Avg. Sequential Read Speed 1,330MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Samsung SM951 AHCI PCIe M.2 256GB is 90.4%. 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 Write Speed 340MB/s
Avg. Sequential Mixed IO Speed 699MB/s

Average Bench

(Based on 5,222 samples)
Min Avg Max
723 Read 1,330 1,551
598 Write 1,014 1,224
499 Mixed 699 856
324 SusWrite 795 1,192
214% 959 MB/s
Min Avg Max
28.6 4K Read 41.2 45.7
58.4 4K Write 111 148
33.1 4K Mixed 49.2 58.9
184% 67 MB/s
Min Avg Max
194 DQ Read 594 701
176 DQ Write 340 395
196 DQ Mixed 457 535
343% 463 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
191GB free (System drive)
Firmware: BXW2500Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 454 1166 1179 1166 1099 1013 MB/s
Read 1,535
Write 1,194
Mixed 760
SusWrite 1,013
252% 1,126 MB/s
4K Read 42.3
4K Write 115
4K Mixed 53.3
193% 70.1 MB/s
DQ Read 697
DQ Write 392
DQ Mixed 525
396% 538 MB/s
137GB free
Firmware: BXW2500Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 1228 1204 1185 1191 1198 1202 MB/s
Read 1,053
Write 1,201
Mixed 677
SusWrite 1,201
233% 1,033 MB/s
4K Read 22.6
4K Write 66.8
4K Mixed 38
118% 42.5 MB/s
DQ Read 699
DQ Write 389
DQ Mixed 526
396% 538 MB/s
5,222 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 16,944,087 SSDs tested.


AmazonUS $2359 mins
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Typical SM951 AHCI PCIe M.2 256GB Builds (Compare 1,620 builds) See popular component choices, score breakdowns and rankings.
Gaming 39%
Jet ski
Desktop 68%
Battle cruiser
Workstation 43%
Speed boat

System: Asus G751JY

EDIT WITH CUSTOM PC BUILDER Value: 12% - Very poor Total price: $235

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.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) August 2019 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 - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


1011 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 i5-9400F $143Nvidia GTX 1660 $220Samsung 850 Evo 250GB $86
Intel Core i5-9600K $219Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $102
AMD Ryzen 5 3600 $196AMD RX 580 $173Samsung 850 Pro 256GB $97
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $42G.SKILL Trident Z DDR4 3200 C14 4x16GB $799SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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