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 39,281 user samples
30,943 User Benchmarks
Best Bench: 125% 168GB free
Worst Bench: 74% 148GB free
Poor: 74% Great: 125%
SPEED RANK: 58th / 862
8,338 User Benchmarks
Best Bench: 100% 63GB free
Worst Bench: 64% 232GB free
Poor: 64% Great: 100%
SPEED RANK: 128th / 862
Effective Speed
Effective SSD Speed
100 % Faster effective speed.
+17%
85.3 % -17%
Read
Avg. Sequential Read Speed
506 MB/s +1% 501 MB/s -1%
Write
Avg. Sequential Write Speed
438 MB/s Faster write speed.
+23%
355 MB/s -23%
4K Read
Avg. 4K Random Read Speed
33.4 MB/s Much faster random read.
+32%
25.3 MB/s -32%
4K Write
Avg. 4K Random Write Speed
90.8 MB/s Slightly faster random write.
+14%
79.9 MB/s -14%
Mixed
Avg. Sequential Mixed IO Speed
456 MB/s Slightly faster mixed IO speed.
+11%
410 MB/s -11%
4K Mixed
Avg. 4K Random Mixed IO Speed
35 MB/s Faster random mixed IO.
+26%
27.8 MB/s -26%
Read
Peak Sequential Read Speed
530 MB/s +1% 524 MB/s -1%
Write
Peak Sequential Write Speed
503 MB/s Much faster peak write speed.
+36%
371 MB/s -36%
4K Read
Peak 4K Random Read Speed
43.4 MB/s Much faster peak random read.
+42%
30.6 MB/s -42%
4K Write
Peak 4K Random Write Speed
127 MB/s Slightly faster peak random write.
+11%
114 MB/s -11%
Mixed
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
+19%
432 MB/s -19%
4K Mixed
Peak 4K Random Mixed IO Speed
52.4 MB/s Much faster peak random mixed IO.
+39%
37.8 MB/s -39%
Market Share
Based on 4,430,761 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.13 % Hugely higher market share.
+214%
0.36 % -214%
Value
Value For Money
91.2 % Much better value.
+55%
59 % -55%
User Rating
UBM User Rating
97 % Much more popular.
+56%
62 % -56%
Price
Price (score)
$110 Cheaper.
+29%
$155 -29%
Age
Newest
40 Months -15% 34 Months More recent.
+15%
DQ Read
Peak 4K-64Thread Read Speed
382 MB/s Much faster peak deep queue read.
+37%
278 MB/s -37%
DQ Write
Peak 4K-64Thread Write Speed
343 MB/s Slightly faster peak deep queue write.
+9%
314 MB/s -9%
AS-SSD Total
AS-SSD Total Score
1,258 Pts Stronger server IO.
+24%
1,014 Pts -24%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Hugely faster peak deep queue mixed IO.
+128%
72.4 MB/s -128%
ADQ Read
Avg. 4K-64Thread Read Speed
213 MB/s Faster deep queue read.
+30%
164 MB/s -30%
ADQ Write
Avg. 4K-64Thread Write Speed
220 MB/s +4% 212 MB/s -4%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
92.7 MB/s Hugely faster deep queue mixed IO.
+90%
48.9 MB/s -90%
Capacity
Capacity
256GB 250GB
ADVERTISEMENT

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]

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Solid State Drive Rankings (Price vs Performance) November 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 $288Nvidia GTX 1070 $410Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $285AMD RX 480 $240Samsung 850 Pro 256GB $110
Intel Core i5-7600K $200Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $189SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $55Corsair Vengeance LPX DDR4 3200 C16 2x8GB $195SanDisk Ultra Fit 32GB $12
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