SamsungMZ-7PD128BW
IntelSSDSC2CW120A3

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

Controller: LSI SandForce SF2281. Flash Memory: Intel Synchronous 25nm MLC

Real World Speed
Performance profile from 21,773 user samples
13,727 User Benchmarks
Best Bench: 98% 71GB free
Worst Bench: 52% 27GB free
Poor: 52% Great: 98%
SPEED RANK: 282nd / 929
8,046 User Benchmarks
Best Bench: 77% 26GB free
Worst Bench: 45% 31GB free
Poor: 45% Great: 77%
SPEED RANK: 545th / 929
Effective Speed
Effective SSD Speed
78 % Faster effective speed.
+25%
62.2 %
Read
Avg. Sequential Read Speed
484 MB/s +2% 474 MB/s
Write
Avg. Sequential Write Speed
309 MB/s Hugely faster write speed.
+115%
144 MB/s
4K Read
Avg. 4K Random Read Speed
28.3 MB/s +5% 27 MB/s
4K Write
Avg. 4K Random Write Speed
75 MB/s +1% 74.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed
336 MB/s Much faster mixed IO speed.
+59%
211 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
20 MB/s Much faster random mixed IO.
+34%
14.9 MB/s
Read
Peak Sequential Read Speed
522 MB/s +1% 515 MB/s
Write
Peak Sequential Write Speed
440 MB/s Hugely faster peak write speed.
+172%
162 MB/s
4K Read
Peak 4K Random Read Speed
35.2 MB/s 37.6 MB/s Slightly faster peak random read.
+7%
4K Write
Peak 4K Random Write Speed
109 MB/s 113 MB/s +4%
Mixed
Peak Sequential Mixed IO Speed
475 MB/s Hugely faster peak mixed IO speed.
+99%
239 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
25.3 MB/s Faster peak random mixed IO.
+20%
21 MB/s
Market Share
Based on 7,168,882 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.29 % Hugely higher market share.
+107%
0.14 %
Value
Value For Money
31.9 % Slightly better value.
+9%
29.2 %
User Rating
UBM User Rating
63 % +3% 61 %
Price
Price (score)
$160 $125 Cheaper.
+22%
Age
Newest
68 Months Slightly more recent.
+11%
76 Months
DQ Read
Peak 4K-64Thread Read Speed
361 MB/s Much faster peak deep queue read.
+56%
231 MB/s
DQ Write
Peak 4K-64Thread Write Speed
314 MB/s Hugely faster peak deep queue write.
+93%
163 MB/s
AS-SSD Total
AS-SSD Total Score
1,153 Pts Much stronger server IO.
+49%
774 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
79.7 MB/s Much faster peak deep queue mixed IO.
+36%
58.8 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
176 MB/s Much faster deep queue read.
+36%
129 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed
178 MB/s Much faster deep queue write.
+39%
128 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
44.8 MB/s Faster deep queue mixed IO.
+30%
34.5 MB/s
Capacity
Capacity
128GB 120GB
ADVERTISEMENT

The 128GB 840 Pro is a rock solid performer. On release, nearly a year and a half ago, the Pro smashed several speed records. Today, with sequential read/write speeds of 519/438 MBps, the Pro is still one of the fastest SSDs available. One of the Pro's top competitors is Samsungs own, newer 840 Evo. Looking at a raw synthetic speed comparison of the 128GB Pro and Evo is a little misleading. On the face of it the Pro only has a marginal lead over the Evo. This due to the fact that the Evo can only maintain its burst write speed for transfers of up to 3GB, the size of its SLC cache. The Pro on the other hand can sustain higher throughputs indefinitely. The Pro also utilizes MLC which is rated for far more erase cycles than the TLC used in the Evo. Server IO is often continuous and would quickly exhaust the 3GB cache on the Evo but for typical consumer use the Evo will remain within the SLC cache most of the time. [Feb '14 SSDrivePro]

MORE DETAILS

The Intel 520 Series was Intel's first SSD to feature a Sandforce 2281 controller. This controller has powered countless SSDs over the last three years but is now dated and is known to be limited in the area of incompressible write speed. The 120GB Intel 520 scored peak and average sequential read/write speeds of 514/157 and 421/133. These read speeds are good but the peak write of 157 MB/s lags the group leaders average of 313 MB/s by nearly 100%. This relative inability to write lowers the 520's overall effective speed to 403 MB/s or 15% lower than the 459 MB/s achieved by the group leaders. At two years of age the Intel 520 can no longer compete with newer drives, there is far better value available amongst the group leaders[Feb '14 SSDrivePro]

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Solid State Drive Rankings (Price vs Performance) June 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
AMD Ryzen 5 1600 $170Nvidia GTX 1070 $440Samsung 850 Evo 250GB $104
Intel Core i7-8700K $320Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $122
Intel Core i5-8600K $239AMD RX 480 $280Samsung 850 Pro 256GB $121
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $177SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $911SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $226SanDisk Ultra Fit 32GB $12
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