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

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

Real World Speed
Performance profile from 280,250 user samples
4,140 User Benchmarks
Best Bench: 106% 197GB free
Worst Bench: 56% 223GB free
Poor: 56% Great: 106%
SPEED RANK: 175th / 911
276,110 User Benchmarks
Best Bench: 115% 64GB free
Worst Bench: 71% 106GB free
Poor: 71% Great: 115%
SPEED RANK: 86th / 911
Effective Speed
Effective SSD Speed
83.2 % 94.9 % Slightly faster effective speed.
Avg. Sequential Read Speed
472 MB/s 498 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
414 MB/s +5% 396 MB/s
4K Read
Avg. 4K Random Read Speed
27.4 MB/s 38.2 MB/s Much faster random read.
4K Write
Avg. 4K Random Write Speed
69.6 MB/s 76.8 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
410 MB/s +2% 401 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
21.2 MB/s 33.5 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
515 MB/s 517 MB/s +0%
Peak Sequential Write Speed
495 MB/s Faster peak write speed.
417 MB/s
4K Read
Peak 4K Random Read Speed
35.4 MB/s 46.6 MB/s Much faster peak random read.
4K Write
Peak 4K Random Write Speed
110 MB/s Slightly faster peak random write.
103 MB/s
Peak Sequential Mixed IO Speed
484 MB/s Slightly faster peak mixed IO speed.
422 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
29.6 MB/s 47.9 MB/s Much faster peak random mixed IO.
Market Share
Based on 6,060,410 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.1 % 6.86 % Insanely higher market share.
Value For Money
74.7 % 103 % Much better value.
User Rating
UBM User Rating
64 % 125 % Hugely more popular.
Price (score)
$105 $85 Cheaper.
45 Months 39 Months Slightly more recent.
DQ Read
Peak 4K-64Thread Read Speed
360 MB/s 372 MB/s +3%
DQ Write
Peak 4K-64Thread Write Speed
314 MB/s Slightly faster peak deep queue write.
280 MB/s
AS-SSD Total
AS-SSD Total Score
1,161 Pts +1% 1,148 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.3 MB/s 122 MB/s Hugely faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
168 MB/s 186 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
181 MB/s +3% 176 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.7 MB/s 66.8 MB/s Much faster deep queue mixed IO.
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 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) March 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.
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

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The Best.
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
AMD Ryzen 5 1600 $188AMD RX 480 $400Samsung 850 Pro 256GB $139
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $216SanDisk Extreme 16GB $18
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