SanDiskSDSSDXPS-240G
SamsungMZ-7KE256BW

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

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND

Real World Speed
Performance profile from 36,494 user samples
4,060 User Benchmarks
Best Bench: 107% 200GB free
Worst Bench: 65% 77GB free
Poor: 65% Great: 107%
SPEED RANK: 115th / 873
32,434 User Benchmarks
Best Bench: 124% 94GB free
Worst Bench: 71% 29GB free
Poor: 71% Great: 124%
SPEED RANK: 59th / 873
Effective Speed
Effective SSD Speed
86.8 % -16% 100 % Faster effective speed.
+16%
Read
Avg. Sequential Read Speed
492 MB/s -2% 504 MB/s +2%
Write
Avg. Sequential Write Speed
421 MB/s -6% 445 MB/s Slightly faster write speed.
+6%
4K Read
Avg. 4K Random Read Speed
29.5 MB/s -12% 33 MB/s Slightly faster random read.
+12%
4K Write
Avg. 4K Random Write Speed
80.2 MB/s -11% 88.9 MB/s Slightly faster random write.
+11%
Mixed
Avg. Sequential Mixed IO Speed
422 MB/s -10% 463 MB/s Slightly faster mixed IO speed.
+10%
4K Mixed
Avg. 4K Random Mixed IO Speed
21 MB/s -67% 35.1 MB/s Much faster random mixed IO.
+67%
Read
Peak Sequential Read Speed
516 MB/s -3% 529 MB/s +3%
Write
Peak Sequential Write Speed
493 MB/s -2% 503 MB/s +2%
4K Read
Peak 4K Random Read Speed
36 MB/s -19% 43 MB/s Faster peak random read.
+19%
4K Write
Peak 4K Random Write Speed
117 MB/s -10% 129 MB/s Slightly faster peak random write.
+10%
Mixed
Peak Sequential Mixed IO Speed
486 MB/s -6% 514 MB/s Slightly faster peak mixed IO speed.
+6%
4K Mixed
Peak 4K Random Mixed IO Speed
29.2 MB/s -82% 53.1 MB/s Hugely faster peak random mixed IO.
+82%
Market Share
Based on 4,776,024 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.13 % -708% 1.05 % Hugely higher market share.
+708%
Value
Value For Money
77.9 % -17% 91.3 % Better value.
+17%
User Rating
UBM User Rating
65 % -51% 98 % Much more popular.
+51%
Price
Price (score)
$105 +5% $110 -5%
Age
Newest
42 Months -2% 41 Months +2%
DQ Read
Peak 4K-64Thread Read Speed
364 MB/s -5% 382 MB/s +5%
DQ Write
Peak 4K-64Thread Write Speed
326 MB/s -6% 344 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score
1,187 Pts -6% 1,260 Pts Slightly stronger server IO.
+6%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
65.4 MB/s -151% 164 MB/s Hugely faster peak deep queue mixed IO.
+151%
ADQ Read
Avg. 4K-64Thread Read Speed
166 MB/s -29% 214 MB/s Faster deep queue read.
+29%
ADQ Write
Avg. 4K-64Thread Write Speed
187 MB/s -20% 225 MB/s Faster deep queue write.
+20%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
37.5 MB/s -140% 90.1 MB/s Hugely faster deep queue mixed IO.
+140%
Capacity
Capacity
240GB 256GB
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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]

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The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]

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Solid State Drive Rankings (Price vs Performance) December 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 userbenchmark.com.
  • - 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.
CPUGPUSSD
Intel Core i7-7700K $280Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $245AMD RX 480 $265Samsung 850 Pro 256GB $110
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $140
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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