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AdataASP900S3-128GM-C
SamsungMZ-7PD128BW
▲ 511,619 ▼

Controller: LSI SandForce SF2281. NAND Flash: Intel Micron Synchronous 25nm MLC. Release date: Q1 2012.

VS
▲ 542,764 ▼

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

Effective Speed 
+31%
Real World Speed
Performance profile from 37,662 user samples
Benchmark your SSD here
2,820 User Benchmarks
Best Bench: 80% 50GB free
Worst Bench: 57% 13GB free (System drive)
Poor: 57% Great: 80%
SPEED RANK: 697th / 1080
34,842 User Benchmarks
Best Bench: 110% 62GB free
Worst Bench: 62% 119GB free
Poor: 62% Great: 110%
SPEED RANK: 344th / 1080
Effective Speed
Effective SSD Speed 		68.6 % 89.5 % Much faster effective speed.
+31%
Average Score 
+49%
Read
Avg. Sequential Read Speed 		380 MB/s 444 MB/s Faster read speed.
+17%
Write
Avg. Sequential Write Speed 		146 MB/s 336 MB/s Hugely faster write speed.
+130%
4K Read
Avg. 4K Random Read Speed 		27.5 MB/s 30.5 MB/s Faster random read.
+11%
4K Write
Avg. 4K Random Write Speed 		81.6 MB/s 81.6 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		190 MB/s 268 MB/s Much faster mixed IO speed.
+41%
4K Mixed
Avg. 4K Random Mixed IO Speed 		33.6 MB/s 35.9 MB/s Slightly faster random mixed IO.
+7%
SusWrite
Avg. Sustained Write Speed 		121 MB/s 286 MB/s Hugely faster sustained write speed.
+136%
Peak Score 
+64%
Read
Peak Sequential Read Speed 		428 MB/s 497 MB/s Faster peak read speed.
+16%
Write
Peak Sequential Write Speed 		168 MB/s 445 MB/s Hugely faster peak write speed.
+165%
4K Read
Peak 4K Random Read Speed 		32 MB/s 36.3 MB/s Faster peak random read.
+13%
4K Write
Peak 4K Random Write Speed 		116 MB/s +3% 113 MB/s
Mixed
Peak Sequential Mixed IO Speed 		216 MB/s 331 MB/s Much faster peak mixed IO speed.
+53%
4K Mixed
Peak 4K Random Mixed IO Speed 		41.1 MB/s 44.1 MB/s Slightly faster peak random mixed IO.
+7%
SusWrite
Peak Sequential Sustained Write 60s Average 		148 MB/s 440 MB/s Hugely faster peak sustained write speed.
+197%
Value & Sentiment 
+82%
Market Share
Based on 77,577,061 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.06 % Hugely higher market share.
+500%
Value
Value For Money 		10.7 % Hugely better value.
+106% 		5.17 %
User Rating
UBM User Rating 		51 % 54 % Slightly more popular.
+6%
Price
Price (score) 		$40 Much cheaper.
+73% 		$150
Nice To Haves 
+54%
Age
Newest 		152 Months 145 Months +5%
DQ Read
Peak 4K-64Thread Read Speed 		199 MB/s 376 MB/s Hugely faster peak deep queue read.
+89%
DQ Write
Peak 4K-64Thread Write Speed 		166 MB/s 330 MB/s Hugely faster peak deep queue write.
+99%
AS-SSD Total
AS-SSD Total Score 		712 Pts 1,196 Pts Much stronger server IO.
+68%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		171 MB/s Faster peak deep queue mixed IO.
+10% 		155 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		160 MB/s 332 MB/s Hugely faster deep queue read.
+108%
ADQ Write
Avg. 4K-64Thread Write Speed 		143 MB/s 245 MB/s Much faster deep queue write.
+71%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		125 MB/s 126 MB/s +1%
Specifications 
Capacity
Capacity 		128GB 128GB
Conclusion 
Average Bench 68.6%
Average Bench 89.5%

The 128GB Adata Premier Pro SP900 has peak and average sequential read/write speeds of 496/166 and 175/106 MB/s. The average speeds are significantly worse than peak which indicates that the SP900 has an unstable performance profile. Additionally, the peak write speed of 166 MB/s is 90% below the group leaders. In terms of small file 4K read/write speeds things are a little better where the SP900 achieved peak and average scores of 23/83 and 17/29 MB/s. These 4K figures still lag the group leaders by around 40%. The Overall effective speed for the SP900 measures 340 MB/s, the worst I have seen to date on a 128GB SSD. The SP900 is not particularly well priced, and therefore represents poor value for money. There are both faster and cheaper 128GB alternatives available amongst the group leaders. [Feb '14 SSDrivePro]

MORE DETAILS

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

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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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 Frequently Asked Questions

Storage Devices FAQ
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Solid State Drives
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