SamsungMZ-7KE256BW
CrucialCT250BX100SSD1

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

Controller: Silicon Motion SM2246EN. Flash Memory: Micron 16nm MLC.

Real World Speed
Performance profile from 55,490 user samples
42,690 User Benchmarks
Best Bench: 121% 159GB free
Worst Bench: 72% 70GB free
Poor: 72% Great: 121%
SPEED RANK: 105th / 921
12,800 User Benchmarks
Best Bench: 100% 26GB free
Worst Bench: 63% 142GB free
Poor: 63% Great: 100%
SPEED RANK: 192nd / 921
Effective Speed
Effective SSD Speed
97.6 % Faster effective speed.
+16%
83.8 %
Read
Avg. Sequential Read Speed
505 MB/s +1% 500 MB/s
Write
Avg. Sequential Write Speed
441 MB/s Faster write speed.
+24%
356 MB/s
4K Read
Avg. 4K Random Read Speed
32.4 MB/s Much faster random read.
+30%
24.9 MB/s
4K Write
Avg. 4K Random Write Speed
86.2 MB/s Slightly faster random write.
+10%
78.4 MB/s
Mixed
Avg. Sequential Mixed IO Speed
462 MB/s Slightly faster mixed IO speed.
+12%
412 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
33.1 MB/s Faster random mixed IO.
+22%
27.1 MB/s
Read
Peak Sequential Read Speed
528 MB/s +1% 524 MB/s
Write
Peak Sequential Write Speed
502 MB/s Much faster peak write speed.
+36%
370 MB/s
4K Read
Peak 4K Random Read Speed
42.9 MB/s Much faster peak random read.
+42%
30.3 MB/s
4K Write
Peak 4K Random Write Speed
122 MB/s Slightly faster peak random write.
+11%
110 MB/s
Mixed
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
+19%
432 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
51.2 MB/s Much faster peak random mixed IO.
+35%
37.8 MB/s
Market Share
Based on 6,466,514 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.73 % Hugely higher market share.
+152%
0.29 %
Value
Value For Money
66.1 % +3% 64.3 %
User Rating
UBM User Rating
99 % Much more popular.
+60%
62 %
Price
Price (score)
$163 $135 Cheaper.
+17%
Age
Newest
45 Months 39 Months Slightly more recent.
+13%
DQ Read
Peak 4K-64Thread Read Speed
375 MB/s Much faster peak deep queue read.
+36%
275 MB/s
DQ Write
Peak 4K-64Thread Write Speed
339 MB/s Slightly faster peak deep queue write.
+9%
311 MB/s
AS-SSD Total
AS-SSD Total Score
1,237 Pts Stronger server IO.
+23%
1002 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
161 MB/s Hugely faster peak deep queue mixed IO.
+123%
72.3 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
189 MB/s Faster deep queue read.
+29%
146 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
210 MB/s Slightly faster deep queue write.
+8%
195 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
81.9 MB/s Much faster deep queue mixed IO.
+72%
47.7 MB/s
Capacity
Capacity
256GB 250GB
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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 250GB Crucial BX100 SSD is the value orientated variant of Crucial's M range of SSDs. The BX100 uses the same NAND as its premium MX200 sibling but the BX100 uses a Silicon Motion controller as opposed to the Marvel controller found in the MX range. Feature wise the BX100 is missing SLC caching and there is no hardware encryption (so security frameworks such as windows Bitlocker will operate less efficiently). In terms of I/O performance the BX100 looks promising. Comparing the BX100 and MX100 shows that the newer BX100 may be faster than its predecessor but as yet there are insufficient user benchmarks to draw any definitive conclusions. The BX100 has only just started hitting the shelves so there's plenty of room for price reductions from its already reasonable price tag. I will revisit this review when I have more performance data for the BX100. [Jan '15 SSDrivePro]

MORE DETAILS

Solid State Drive Rankings (Price vs Performance) April 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]

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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 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 i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $290Samsung 850 Evo 500GB $136
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $36Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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