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SamsungMZ-7PD256BW
CrucialCT256MX100SSD1
$116
▲ 6320,538 ▼

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

VS
Copy
▲ 649,917 ▼
 $116 

Controller: Marvell 88SS9189. Flash Memory: Micron 16nm MLC.

Effective Speed 
+3%
Real World Speed
Performance profile from 40,323 user samples
Benchmark your SSD here
22,431 User Benchmarks
Best Bench: 105% 182GB free
Worst Bench: 56% 41GB free
Poor: 56% Great: 105%
SPEED RANK: 203rd / 921
17,892 User Benchmarks
Best Bench: 94% 77GB free
Worst Bench: 61% 56GB free
Poor: 61% Great: 94%
SPEED RANK: 242nd / 921
Effective Speed
Effective SSD Speed 		83 % +3% 80.3 %
Average User Bench 
+2%
Read
Avg. Sequential Read Speed 		493 MB/s 495 MB/s +0%
Write
Avg. Sequential Write Speed 		362 MB/s Slightly faster write speed.
+12% 		324 MB/s
4K Read
Avg. 4K Random Read Speed 		28.2 MB/s Slightly faster random read.
+12% 		25.1 MB/s
4K Write
Avg. 4K Random Write Speed 		75.7 MB/s 81.7 MB/s Slightly faster random write.
+8%
Mixed
Avg. Sequential Mixed IO Speed 		393 MB/s Slightly faster mixed IO speed.
+6% 		370 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		21.8 MB/s 24.5 MB/s Slightly faster random mixed IO.
+12%
Peak Lab Bench 
+12%
Read
Peak Sequential Read Speed 		523 MB/s +0% 522 MB/s
Write
Peak Sequential Write Speed 		494 MB/s Much faster peak write speed.
+49% 		332 MB/s
4K Read
Peak 4K Random Read Speed 		35.8 MB/s Faster peak random read.
+18% 		30.4 MB/s
4K Write
Peak 4K Random Write Speed 		111 MB/s 115 MB/s +4%
Mixed
Peak Sequential Mixed IO Speed 		509 MB/s Faster peak mixed IO speed.
+29% 		396 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		28.4 MB/s 33.4 MB/s Faster peak random mixed IO.
+18%
Value & Sentiment 
+41%
Market Share
Based on 6,460,555 SSDs tested.
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.4 % 0.41 % +2%
Value
Value For Money 		35.6 % 70.2 % Hugely better value.
+97%
User Rating
UBM User Rating 		63 % 64 % +2%
Price
Price (score) 		$300 $116 Much cheaper.
+61%
Nice To Haves 
+30%
Age
Newest 		66 Months 46 Months Much more recent.
+30%
DQ Read
Peak 4K-64Thread Read Speed 		365 MB/s Much faster peak deep queue read.
+64% 		222 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		317 MB/s Slightly faster peak deep queue write.
+5% 		301 MB/s
AS-SSD Total
AS-SSD Total Score 		1,174 Pts Stronger server IO.
+29% 		912 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		89.7 MB/s Much faster peak deep queue mixed IO.
+69% 		53.2 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		193 MB/s Much faster deep queue read.
+61% 		120 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		184 MB/s 193 MB/s +5%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		53.3 MB/s Much faster deep queue mixed IO.
+48% 		36 MB/s
Specifications 
Capacity
Capacity 		256GB 256GB
Conclusion 
Average Bench 83%
Average Bench 80.3%
ADVERTISEMENT

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 Crucial MX100 is the first 16nm SSD to date. Aside from NAND, the MX100 shares the same hardware as its more expensive sibling, the M550. Comparing the MX100 and M550 shows that the two drives have similar read speeds but that the MX100 lags by nearly 50% at writing. The newer 16nm NAND reduces costs and accordingly the MX100 is the cheapest SSD (per GB) to date. In terms of performance the MX100 is a compromise which may or may not be worth making depending on individual circumstances. For typical desktop use including email, office documents and web browsing the MX100 is a great choice but power users should look elsewhere. Comparing the 250GB 840 EVO and 256GB MX100 shows that for a marginal premium, the Evo offers better write speeds. (Note: at 500GB they are more evenly matched) [Jun '14 SSDrivePro]

MORE DETAILS

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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

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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

Storage Devices FAQ
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
What is queue depth?
What is 4K random write speed?
Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
How is the AS SSD write score calculated?
How is the AS SSD read score calculated?
How is the AS SSD total score calculated?
ALL FAQs »

 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 $300Samsung 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) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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