SamsungMZ-7KE256BW
CrucialCT256M550SSD1
$152

Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND. Release date: Q3 2014.

 $152 

Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC. Release date: Q1 2014.

Real World Speed
Performance profile from 70,528 user samples
65,820 User Benchmarks
Best Bench: 128% 238GB free
Worst Bench: 73% 39GB free
Poor: 73% Great: 128%
SPEED RANK: 181st / 1003
4,708 User Benchmarks
Best Bench: 112% 238GB free
Worst Bench: 63% 79GB free (System drive)
Poor: 63% Great: 112%
SPEED RANK: 248th / 1003
Effective Speed
Effective SSD Speed
105 % Slightly faster effective speed.
+15%
91.4 %
Read
Avg. Sequential Read Speed
472 MB/s Slightly faster read speed.
+13%
418 MB/s
Write
Avg. Sequential Write Speed
415 MB/s 418 MB/s +1%
4K Read
Avg. 4K Random Read Speed
34.6 MB/s Faster random read.
+29%
26.9 MB/s
4K Write
Avg. 4K Random Write Speed
94.9 MB/s Slightly faster random write.
+5%
90 MB/s
Mixed
Avg. Sequential Mixed IO Speed
342 MB/s Slightly faster mixed IO speed.
+14%
299 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
45.4 MB/s Faster random mixed IO.
+19%
38.2 MB/s
SusWrite
Avg. Sustained Write Speed
363 MB/s Faster sustained write speed.
+20%
302 MB/s
Read
Peak Sequential Read Speed
515 MB/s Slightly faster peak read speed.
+11%
464 MB/s
Write
Peak Sequential Write Speed
491 MB/s +4% 470 MB/s
4K Read
Peak 4K Random Read Speed
44.1 MB/s Much faster peak random read.
+37%
32.1 MB/s
4K Write
Peak 4K Random Write Speed
133 MB/s Slightly faster peak random write.
+6%
126 MB/s
Mixed
Peak Sequential Mixed IO Speed
390 MB/s Faster peak mixed IO speed.
+18%
330 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
58.2 MB/s Faster peak random mixed IO.
+23%
47.2 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
486 MB/s Slightly faster peak sustained write speed.
+6%
457 MB/s
Market Share
Based on 15,781,594 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.39 % Insanely higher market share.
+∞%
0 %
Value
Value For Money
105 % Much better value.
+61%
65.2 %
User Rating
UBM User Rating
97 % Much more popular.
+73%
56 %
Price
Price (score)
$97 Much cheaper.
+36%
$152
Age
Newest
60 Months +5% 63 Months
DQ Read
Peak 4K-64Thread Read Speed
387 MB/s 387 MB/s
DQ Write
Peak 4K-64Thread Write Speed
359 MB/s 359 MB/s
AS-SSD Total
AS-SSD Total Score
1,286 Pts +3% 1,247 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
357 MB/s Much faster peak deep queue mixed IO.
+49%
240 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
338 MB/s Slightly faster deep queue read.
+5%
321 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
298 MB/s 302 MB/s +1%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
299 MB/s Much faster deep queue mixed IO.
+44%
208 MB/s
Capacity
Capacity
256GB 256GB
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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]

MORE DETAILS

The 256GB Crucial M550 is a welcome improvement over the 240GB M500. The new Marvel 88SS9189 controller has addressed our primary concern with the M500 which was poor sequential write speed. With sequential read/write speeds of 510/478 MB/s the M550 has a healthy core performance profile. Comparing the M550 and M500 shows that the new M550 leads on nearly every single performance metric. Unfortunately the M550 is priced significantly higher than the M500 but prices will likely drop as retailers build up stocks of the new M550. A key comparable for the M550 is the similarly priced market leading Samsung Evo. Comparing the Evo and M550 shows that the Evo is around 11% slower in terms of effective speed[Mar '14 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) July 2019 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]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - 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 current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

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The Best.
CPUGPUSSD
Intel Core i7-8700K $350Nvidia GTX 1070 $400Samsung 850 Evo 250GB $104
AMD Ryzen 5 2600 $127Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $103
AMD Ryzen 7 2700X $248Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $68SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $606SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78SanDisk Ultra Fit 32GB $12
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