Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC.

Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC.

Real World Speed
Performance profile from 9,648 user samples
3,590 User Benchmarks
Best Bench: 105% 101GB free
Worst Bench: 66% 160GB free
Poor: 66% Great: 105%
SPEED RANK: 108th / 862
6,058 User Benchmarks
Best Bench: 100% 47GB free
Worst Bench: 59% 97GB free
Poor: 59% Great: 100%
SPEED RANK: 159th / 862
Effective Speed
Effective SSD Speed
87.2 % Slightly faster effective speed.
82.7 % -6%
Avg. Sequential Read Speed
494 MB/s -2% 503 MB/s +2%
Avg. Sequential Write Speed
424 MB/s Faster write speed.
365 MB/s -16%
4K Read
Avg. 4K Random Read Speed
29.6 MB/s Slightly faster random read.
26.9 MB/s -10%
4K Write
Avg. 4K Random Write Speed
79.5 MB/s Slightly faster random write.
70.5 MB/s -13%
Avg. Sequential Mixed IO Speed
423 MB/s Slightly faster mixed IO speed.
376 MB/s -12%
4K Mixed
Avg. 4K Random Mixed IO Speed
21.1 MB/s -12% 23.7 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
516 MB/s -2% 527 MB/s +2%
Peak Sequential Write Speed
493 MB/s Faster peak write speed.
399 MB/s -24%
4K Read
Peak 4K Random Read Speed
35.9 MB/s Slightly faster peak random read.
32.9 MB/s -9%
4K Write
Peak 4K Random Write Speed
116 MB/s Faster peak random write.
100 MB/s -16%
Peak Sequential Mixed IO Speed
485 MB/s Faster peak mixed IO speed.
415 MB/s -17%
4K Mixed
Peak 4K Random Mixed IO Speed
29.1 MB/s -17% 34.1 MB/s Faster peak random mixed IO.
Market Share
Based on 4,432,791 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.17 % -41% 0.24 % Much higher market share.
Value For Money
78.3 % Hugely better value.
39.9 % -96%
User Rating
UBM User Rating
64 % -6% 68 % Slightly more popular.
Price (score)
$105 Much cheaper.
$250 -58%
41 Months -17% 34 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
361 MB/s +1% 357 MB/s -1%
DQ Write
Peak 4K-64Thread Write Speed
324 MB/s Faster peak deep queue write.
275 MB/s -18%
AS-SSD Total
AS-SSD Total Score
1,179 Pts Slightly stronger server IO.
1,089 Pts -8%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.3 MB/s -2% 66.7 MB/s +2%
ADQ Read
Avg. 4K-64Thread Read Speed
173 MB/s -2% 177 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s Slightly faster deep queue write.
173 MB/s -9%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
39.2 MB/s -5% 41 MB/s +5%
240GB 250GB

The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '14 SSDrivePro]


The 250GB Crucial MX200 is successor to the hugely successful MX100. Both drives use the same NAND and controller but the new MX200 features Dynamic Write Acceleration (DWA) which is a new dynamically sized SLC cache. Samsung were the first to introduce SLC caching on the 840 Evo nearly two years ago so Crucial are somewhat late to the party. SLC caches generally only help performance in corner case real word scenarios and benchmarks. I prefer drives without SLC caches because they offer more consistent and sustainable real world IO. Comparing the MX100 and MX200 shows that the newer MX200 has a significantly faster peak write speed which is of course explained by the new DWA cache. Price is the deciding factor between the MX100 and MX200 so although the MX200 isn't priced aggressively yet, it will almost certainly move up the value rankings when retailers build stocks and subsequently cut prices. [Feb '15 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) November 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 $288Nvidia GTX 1070 $410Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $270AMD RX 480 $240Samsung 850 Pro 256GB $110
Intel Core i5-7600K $200Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $189SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55Corsair Vengeance LPX DDR4 3200 C16 2x8GB $195SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback