Controller: Phison PS3110-S10. NAND Flash: Toshiba 19nm MLC.

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

Real World Speed
Performance profile from 164,133 user samples
558 User Benchmarks
Best Bench: 102% 148GB free
Worst Bench: 55% 41GB free
Poor: 55% Great: 102%
SPEED RANK: 144th / 859
163,575 User Benchmarks
Best Bench: 115% 152GB free
Worst Bench: 69% 233GB free
Poor: 69% Great: 115%
SPEED RANK: 69th / 859
Effective Speed
Effective SSD Speed
83.3 % -13% 94.1 % Slightly faster effective speed.
Avg. Sequential Read Speed
495 MB/s -1% 500 MB/s +1%
Avg. Sequential Write Speed
424 MB/s Slightly faster write speed.
393 MB/s -8%
4K Read
Avg. 4K Random Read Speed
29.1 MB/s -29% 37.6 MB/s Faster random read.
4K Write
Avg. 4K Random Write Speed
75.2 MB/s -2% 76.6 MB/s +2%
Avg. Sequential Mixed IO Speed
452 MB/s Slightly faster mixed IO speed.
396 MB/s -14%
4K Mixed
Avg. 4K Random Mixed IO Speed
13.7 MB/s -136% 32.3 MB/s Hugely faster random mixed IO.
Peak Sequential Read Speed
528 MB/s +2% 517 MB/s -2%
Peak Sequential Write Speed
508 MB/s Faster peak write speed.
417 MB/s -22%
4K Read
Peak 4K Random Read Speed
37.6 MB/s -26% 47.3 MB/s Faster peak random read.
4K Write
Peak 4K Random Write Speed
117 MB/s Slightly faster peak random write.
109 MB/s -7%
Peak Sequential Mixed IO Speed
515 MB/s Faster peak mixed IO speed.
422 MB/s -22%
4K Mixed
Peak 4K Random Mixed IO Speed
16.2 MB/s -195% 47.8 MB/s Hugely faster peak random mixed IO.
Market Share
Based on 3,841,929 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.02 % -46,550% 9.33 % Insanely higher market share.
Value For Money
52.1 % -94% 101 % Hugely better value.
User Rating
UBM User Rating
62 % -92% 119 % Hugely more popular.
Price (score)
$170 -49% $86 Much cheaper.
33 Months 0% 33 Months 0%
DQ Read
Peak 4K-64Thread Read Speed
364 MB/s -3% 376 MB/s +3%
DQ Write
Peak 4K-64Thread Write Speed
348 MB/s Faster peak deep queue write.
284 MB/s -23%
AS-SSD Total
AS-SSD Total Score
1,215 Pts +4% 1,166 Pts -4%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
62.6 MB/s -87% 117 MB/s Hugely faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
175 MB/s -8% 189 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
211 MB/s Faster deep queue write.
180 MB/s -17%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
21.2 MB/s -194% 62.4 MB/s Hugely faster deep queue mixed IO.
240GB 250GB

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) September 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i7-7700K $297Nvidia GTX 1070 $410Samsung 850 Evo 250GB $86
AMD Ryzen 7 1700 $270AMD RX 480 $350Samsung 850 Pro 256GB $120
Intel Core i5-7600K $220Nvidia GTX 1060-6GB $265Samsung 850 Evo 500GB $149
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $724SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $152SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $40HyperX Fury DDR4 2133 C14 2x8GB $141SanDisk Extreme 16GB $20
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback