SamsungMZ-7PD256BW
CrucialCT250BX100SSD1

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC. Release date: Q4 2012.

Controller: Silicon Motion SM2246EN. Flash Memory: Micron 16nm MLC. Release date: Q1 2015.

Real World Speed
Performance profile from 38,396 user samples
25,421 User Benchmarks
Best Bench: 117% 151GB free
Worst Bench: 61% 97GB free (System drive)
Poor: 61% Great: 117%
SPEED RANK: 181st / 959
12,975 User Benchmarks
Best Bench: 105% 142GB free
Worst Bench: 58% 204GB free (System drive)
Poor: 58% Great: 105%
SPEED RANK: 252nd / 959
Effective Speed
Effective SSD Speed
92.4 % Slightly faster effective speed.
+7%
86.2 %
Read
Avg. Sequential Read Speed
455 MB/s 472 MB/s +4%
Write
Avg. Sequential Write Speed
357 MB/s +4% 344 MB/s
4K Read
Avg. 4K Random Read Speed
30.3 MB/s Faster random read.
+16%
26.2 MB/s
4K Write
Avg. 4K Random Write Speed
84.2 MB/s Slightly faster random write.
+5%
80 MB/s
Mixed
Avg. Sequential Mixed IO Speed
292 MB/s +2% 286 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
38.6 MB/s Slightly faster random mixed IO.
+7%
36.2 MB/s
SusWrite
Avg. Sustained Write Speed
290 MB/s Slightly faster sustained write speed.
+8%
268 MB/s
Read
Peak Sequential Read Speed
510 MB/s 516 MB/s +1%
Write
Peak Sequential Write Speed
487 MB/s Much faster peak write speed.
+31%
371 MB/s
4K Read
Peak 4K Random Read Speed
36.6 MB/s Faster peak random read.
+18%
31.1 MB/s
4K Write
Peak 4K Random Write Speed
118 MB/s +1% 117 MB/s
Mixed
Peak Sequential Mixed IO Speed
360 MB/s Slightly faster peak mixed IO speed.
+7%
337 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
47.6 MB/s +5% 45.5 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average
474 MB/s Much faster peak sustained write speed.
+31%
363 MB/s
Market Share
Based on 9,162,958 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.35 % Hugely higher market share.
+84%
0.19 %
Value
Value For Money
46.5 % 58.2 % Better value.
+25%
User Rating
UBM User Rating
63 % +2% 62 %
Price
Price (score)
$242 $160 Much cheaper.
+34%
Age
Newest
72 Months 45 Months Much more recent.
+38%
DQ Read
Peak 4K-64Thread Read Speed
386 MB/s Much faster peak deep queue read.
+37%
281 MB/s
DQ Write
Peak 4K-64Thread Write Speed
326 MB/s +2% 321 MB/s
AS-SSD Total
AS-SSD Total Score
1,220 Pts Stronger server IO.
+19%
1,029 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
175 MB/s 198 MB/s Slightly faster peak deep queue mixed IO.
+13%
ADQ Read
Avg. 4K-64Thread Read Speed
338 MB/s Much faster deep queue read.
+36%
249 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
260 MB/s 274 MB/s Slightly faster deep queue write.
+5%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
141 MB/s 164 MB/s Faster deep queue mixed IO.
+16%
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]

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) October 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 - 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

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $345Samsung 850 Evo 250GB $100
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $249Samsung 850 Evo 500GB $98
Intel Core i7-7700K $350AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80Corsair Vengeance LPX DDR4 3000 C15 2x8GB $148SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $145SanDisk Ultra Fit 32GB $12
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