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SamsungMZ-7PD128BW
SamsungMZ-75E500B
▲ 542,764 ▼

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

VS
▲ 539,881 ▼

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND. Release date: Q4 2014.

Effective Speed 
+25%
Real World Speed
Performance profile from 730,506 user samples
Benchmark your SSD here
34,842 User Benchmarks
Best Bench: 110% 62GB free
Worst Bench: 62% 119GB free
Poor: 62% Great: 110%
SPEED RANK: 344th / 1080
695,664 User Benchmarks
Best Bench: 134% 162GB free
Worst Bench: 80% 162GB free (System drive)
Poor: 80% Great: 134%
SPEED RANK: 217th / 1080
Effective Speed
Effective SSD Speed 		89.5 % 112 % Faster effective speed.
+25%
Average Score 
+29%
Read
Avg. Sequential Read Speed 		444 MB/s 471 MB/s Slightly faster read speed.
+6%
Write
Avg. Sequential Write Speed 		336 MB/s 441 MB/s Much faster write speed.
+31%
4K Read
Avg. 4K Random Read Speed 		30.5 MB/s 40.3 MB/s Much faster random read.
+32%
4K Write
Avg. 4K Random Write Speed 		81.6 MB/s 95.6 MB/s Faster random write.
+17%
Mixed
Avg. Sequential Mixed IO Speed 		268 MB/s 376 MB/s Much faster mixed IO speed.
+40%
4K Mixed
Avg. 4K Random Mixed IO Speed 		35.9 MB/s 53.8 MB/s Much faster random mixed IO.
+50%
SusWrite
Avg. Sustained Write Speed 		286 MB/s 365 MB/s Faster sustained write speed.
+28%
Peak Score 
+20%
Read
Peak Sequential Read Speed 		497 MB/s 507 MB/s +2%
Write
Peak Sequential Write Speed 		445 MB/s 492 MB/s Faster peak write speed.
+11%
4K Read
Peak 4K Random Read Speed 		36.3 MB/s 47.5 MB/s Much faster peak random read.
+31%
4K Write
Peak 4K Random Write Speed 		113 MB/s 128 MB/s Faster peak random write.
+13%
Mixed
Peak Sequential Mixed IO Speed 		331 MB/s 414 MB/s Faster peak mixed IO speed.
+25%
4K Mixed
Peak 4K Random Mixed IO Speed 		44.1 MB/s 65.9 MB/s Much faster peak random mixed IO.
+49%
SusWrite
Peak Sequential Sustained Write 60s Average 		440 MB/s 488 MB/s Faster peak sustained write speed.
+11%
Value & Sentiment 
+531%
Market Share
Based on 77,611,912 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.04 % 0.7 % Insanely higher market share.
+1,650%
Value
Value For Money 		5.17 % 27.5 % Hugely better value.
+432%
User Rating
UBM User Rating 		54 % +2% 53 %
Price
Price (score) 		$150 $85 Much cheaper.
+43%
Nice To Haves 
+45%
Age
Newest 		145 Months 119 Months More recent.
+18%
DQ Read
Peak 4K-64Thread Read Speed 		376 MB/s 386 MB/s +3%
DQ Write
Peak 4K-64Thread Write Speed 		330 MB/s 362 MB/s Slightly faster peak deep queue write.
+10%
AS-SSD Total
AS-SSD Total Score 		1,196 Pts 1,288 Pts Slightly stronger server IO.
+8%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		155 MB/s 371 MB/s Hugely faster peak deep queue mixed IO.
+139%
ADQ Read
Avg. 4K-64Thread Read Speed 		332 MB/s 348 MB/s +5%
ADQ Write
Avg. 4K-64Thread Write Speed 		245 MB/s 302 MB/s Faster deep queue write.
+23%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		126 MB/s 317 MB/s Hugely faster deep queue mixed IO.
+152%
Specifications 
Capacity
Capacity 		128GB 500GB
Conclusion 
Average Bench 89.5%
Average Bench 112%

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]

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Solid State Drive Rankings (Price vs Performance) November 2024 SSD Rankings

Welcome to our 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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Welcome to our 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 value for money upgrades.

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 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
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?
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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?
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
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Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $320
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