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TranscendTS512GSSD370
AdataASP920SS3-256GM-C
▲ 52255 ▼

Controller: Silicon Motion SM2246EN. NAND: Micron 20nm Synchronous MLC. Release date: Q3 2014.

VS
▲ 53529 ▼

Controller: Marvell 88SS9189. Flash Memory: Micron 20nm MLC. Release date: Q2 2014.

Effective Speed 
+7%
Real World Speed
Performance profile from 4,408 user samples
Benchmark your SSD here
1,585 User Benchmarks
Best Bench: 105% 90GB free
Worst Bench: 52% 62GB free
Poor: 52% Great: 105%
SPEED RANK: 417th / 1074
2,823 User Benchmarks
Best Bench: 99% 179GB free (System drive)
Worst Bench: 52% 32GB free
Poor: 52% Great: 99%
SPEED RANK: 500th / 1074
Effective Speed
Effective SSD Speed 		84.5 % Slightly faster effective speed.
+7% 		79 %
Average Score 
+13%
Read
Avg. Sequential Read Speed 		459 MB/s Slightly faster read speed.
+7% 		429 MB/s
Write
Avg. Sequential Write Speed 		391 MB/s Much faster write speed.
+33% 		293 MB/s
4K Read
Avg. 4K Random Read Speed 		23.6 MB/s 25 MB/s Slightly faster random read.
+6%
4K Write
Avg. 4K Random Write Speed 		71.3 MB/s 73.5 MB/s +3%
Mixed
Avg. Sequential Mixed IO Speed 		271 MB/s Faster mixed IO speed.
+13% 		240 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		32.3 MB/s +3% 31.5 MB/s
SusWrite
Avg. Sustained Write Speed 		328 MB/s Much faster sustained write speed.
+41% 		233 MB/s
Peak Score 
+9%
Read
Peak Sequential Read Speed 		511 MB/s Slightly faster peak read speed.
+5% 		486 MB/s
Write
Peak Sequential Write Speed 		439 MB/s Faster peak write speed.
+27% 		346 MB/s
4K Read
Peak 4K Random Read Speed 		28.7 MB/s 30 MB/s +5%
4K Write
Peak 4K Random Write Speed 		110 MB/s 111 MB/s +1%
Mixed
Peak Sequential Mixed IO Speed 		330 MB/s Slightly faster peak mixed IO speed.
+7% 		307 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		42.6 MB/s +1% 42.2 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		436 MB/s Faster peak sustained write speed.
+27% 		342 MB/s
Value & Sentiment 
+27%
Market Share
Based on 76,092,506 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.01 % 0.01 %
Value
Value For Money 		12.1 % Hugely better value.
+98% 		6.11 %
User Rating
UBM User Rating 		52 % 53 % +2%
Price
Price (score) 		$179 Cheaper.
+12% 		$203
Nice To Haves 
+1%
Age
Newest 		118 Months +3% 122 Months
DQ Read
Peak 4K-64Thread Read Speed 		285 MB/s 374 MB/s Much faster peak deep queue read.
+31%
DQ Write
Peak 4K-64Thread Write Speed 		303 MB/s 320 MB/s Slightly faster peak deep queue write.
+6%
AS-SSD Total
AS-SSD Total Score 		1,015 Pts 1,152 Pts Stronger server IO.
+14%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		214 MB/s +1% 211 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		249 MB/s 285 MB/s Faster deep queue read.
+14%
ADQ Write
Avg. 4K-64Thread Write Speed 		251 MB/s Slightly faster deep queue write.
+5% 		238 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		178 MB/s Much faster deep queue mixed IO.
+65% 		108 MB/s
Specifications 
Capacity
Capacity 		512GB 256GB
Conclusion 
Average Bench 84.5%
Average Bench 79%
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The ADATA SP920 shares the same controller (Marvel 88SS9189), and for capacities over 256GB the same NAND configuration as the excellent Crucial M550. The lower capacity SP920 drives however have fewer NAND channels than the M550. Comparing the 512GB M550 and SP920 shows that the drives have comparable performance but at the 256GB and 128GB capacities the M550 has a significantly faster sequential write speed. The 256GB SP920 does have an average effective speed and it is priced below average so overall it represents reasonably good value for money. That said, there are both faster and cheaper SSDs available in the now both heavily saturated and extremely competitive SSD market. [May '15 SSDrivePro]

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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.
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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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  • - CPU tests include: integer, floating and string
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  • - RAM tests include: single/multi core bandwidth and latency
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  • - Reports are generated and presented on userbenchmark.com
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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?
What is queue depth?
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?
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The Best.
CPUGPUSSD
Intel Core i5-12600K $174Nvidia RTX 4060 $293Crucial MX500 250GB $39
Intel Core i5-12400F $120Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-13600K $260Nvidia RTX 4070 $549Samsung 870 Evo 250GB $44
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $28Corsair Vengeance LPX DDR4 3000 C15 2x8GB $48SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $62G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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