SamsungMZ-7PD256BW
CrucialCT250BX100SSD1

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

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

Real World Speed
Performance profile from 35,792 user samples
23,209 User Benchmarks
Best Bench: 105% 182GB free
Worst Bench: 54% 15GB free
Poor: 54% Great: 105%
SPEED RANK: 214th / 921
12,583 User Benchmarks
Best Bench: 100% 26GB free
Worst Bench: 64% 142GB free
Poor: 64% Great: 100%
SPEED RANK: 189th / 921
Effective Speed
Effective SSD Speed
82 % 84.2 % +3%
Read
Avg. Sequential Read Speed
489 MB/s 501 MB/s +2%
Write
Avg. Sequential Write Speed
352 MB/s 356 MB/s +1%
4K Read
Avg. 4K Random Read Speed
28.1 MB/s Slightly faster random read.
+12%
25 MB/s
4K Write
Avg. 4K Random Write Speed
75.7 MB/s 78.4 MB/s +4%
Mixed
Avg. Sequential Mixed IO Speed
382 MB/s 412 MB/s Slightly faster mixed IO speed.
+8%
4K Mixed
Avg. 4K Random Mixed IO Speed
21.8 MB/s 27.4 MB/s Faster random mixed IO.
+26%
Read
Peak Sequential Read Speed
524 MB/s 524 MB/s
Write
Peak Sequential Write Speed
494 MB/s Much faster peak write speed.
+34%
370 MB/s
4K Read
Peak 4K Random Read Speed
36 MB/s Faster peak random read.
+19%
30.3 MB/s
4K Write
Peak 4K Random Write Speed
112 MB/s +1% 111 MB/s
Mixed
Peak Sequential Mixed IO Speed
508 MB/s Faster peak mixed IO speed.
+18%
432 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
28.2 MB/s 37.8 MB/s Much faster peak random mixed IO.
+34%
Market Share
Based on 6,415,947 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.45 % Much higher market share.
+55%
0.29 %
Value
Value For Money
35.2 % 64.6 % Hugely better value.
+84%
User Rating
UBM User Rating
63 % +2% 62 %
Price
Price (score)
$300 $135 Much cheaper.
+55%
Age
Newest
66 Months 39 Months Much more recent.
+41%
DQ Read
Peak 4K-64Thread Read Speed
362 MB/s Much faster peak deep queue read.
+32%
275 MB/s
DQ Write
Peak 4K-64Thread Write Speed
315 MB/s +1% 312 MB/s
AS-SSD Total
AS-SSD Total Score
1,168 Pts Stronger server IO.
+16%
1004 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
89.4 MB/s Faster peak deep queue mixed IO.
+24%
72.3 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
191 MB/s Faster deep queue read.
+28%
149 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
178 MB/s 198 MB/s Slightly faster deep queue write.
+11%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
53 MB/s Slightly faster deep queue mixed IO.
+10%
48.4 MB/s
Capacity
Capacity
256GB 250GB
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The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]

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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) 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 $80
AMD Ryzen 5 1600 $170Nvidia GTX 1060-6GB $310Samsung 850 Evo 500GB $137
Intel Core i7-7700K $290AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $45
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $204SanDisk Ultra Fit 32GB $12
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