SamsungMZ-75E250B
SanDiskSDSSDXPS-240G

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

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

Real World Speed
Performance profile from 183,465 user samples
181,090 User Benchmarks
Best Bench: 116% 99GB free
Worst Bench: 72% 33GB free
Poor: 72% Great: 116%
SPEED RANK: 66th / 860
2,375 User Benchmarks
Best Bench: 107% 90GB free
Worst Bench: 65% 160GB free
Poor: 65% Great: 107%
SPEED RANK: 102nd / 860
Effective Speed
Effective SSD Speed
95.9 % Slightly faster effective speed.
+9%
88.3 % -9%
Read
Avg. Sequential Read Speed
499 MB/s +2% 490 MB/s -2%
Write
Avg. Sequential Write Speed
396 MB/s -8% 426 MB/s Slightly faster write speed.
+8%
4K Read
Avg. 4K Random Read Speed
38.8 MB/s Much faster random read.
+35%
28.8 MB/s -35%
4K Write
Avg. 4K Random Write Speed
79.6 MB/s +5% 75.9 MB/s -5%
Mixed
Avg. Sequential Mixed IO Speed
397 MB/s -5% 417 MB/s Slightly faster mixed IO speed.
+5%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.3 MB/s Much faster random mixed IO.
+48%
22.5 MB/s -48%
Read
Peak Sequential Read Speed
517 MB/s +0% 516 MB/s -0%
Write
Peak Sequential Write Speed
417 MB/s -19% 495 MB/s Faster peak write speed.
+19%
4K Read
Peak 4K Random Read Speed
47.5 MB/s Much faster peak random read.
+32%
36 MB/s -32%
4K Write
Peak 4K Random Write Speed
109 MB/s -7% 117 MB/s Slightly faster peak random write.
+7%
Mixed
Peak Sequential Mixed IO Speed
422 MB/s -15% 486 MB/s Faster peak mixed IO speed.
+15%
4K Mixed
Peak 4K Random Mixed IO Speed
48.2 MB/s Much faster peak random mixed IO.
+63%
29.6 MB/s -63%
Market Share
Based on 4,121,346 SSDs tested.
Market Share
Market Share (trailing 30 days)
9.14 % Insanely higher market share.
+5,613%
0.16 % -5,613%
Value
Value For Money
93.5 % Better value.
+18%
79.3 % -18%
User Rating
UBM User Rating
121 % Hugely more popular.
+89%
64 % -89%
Price
Price (score)
$98 Slightly cheaper.
+7%
$105 -7%
Age
Newest
34 Months More recent.
+15%
40 Months -15%
DQ Read
Peak 4K-64Thread Read Speed
379 MB/s +3% 369 MB/s -3%
DQ Write
Peak 4K-64Thread Write Speed
284 MB/s -15% 328 MB/s Faster peak deep queue write.
+15%
AS-SSD Total
AS-SSD Total Score
1,171 Pts -2% 1,196 Pts +2%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
118 MB/s Hugely faster peak deep queue mixed IO.
+80%
65.4 MB/s -80%
ADQ Read
Avg. 4K-64Thread Read Speed
193 MB/s -10% 212 MB/s Slightly faster deep queue read.
+10%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s -9% 205 MB/s Slightly faster deep queue write.
+9%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
65.8 MB/s Much faster deep queue mixed IO.
+40%
46.9 MB/s -40%
Capacity
Capacity
250GB 240GB
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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]

MORE DETAILS

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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Solid State Drive Rankings (Price vs Performance) October 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 $300Nvidia GTX 1070 $394Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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