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SanDiskSDSSDHII-960G-G25
CorsairCSSD-P256GBP-BK
$348
▲ 52570 ▼

Controller: Marvell 88SS9187. Memory: SanDisk 19nm TLC. Release date: Q3 2014.

VS
▲ 52483 ▼
 $348 

Controller: Marvell 88S9174-BKK2. FLASH: Toshiba 32nm Toggle Mode MLC. Release date: Q4 2011.

Effective Speed 
+3%
Real World Speed
Performance profile from 35,772 user samples
Benchmark your SSD here
35,454 User Benchmarks
Best Bench: 107% 86GB free
Worst Bench: 62% 85GB free (System drive)
Poor: 62% Great: 107%
SPEED RANK: 413th / 1071
318 User Benchmarks
Best Bench: 98% 141GB free (System drive)
Worst Bench: 57% 238GB free
Poor: 57% Great: 98%
SPEED RANK: 459th / 1071
Effective Speed
Effective SSD Speed 		84.5 % +3% 81.8 %
Average Score 
+0%
Read
Avg. Sequential Read Speed 		439 MB/s 441 MB/s +0%
Write
Avg. Sequential Write Speed 		384 MB/s +4% 370 MB/s
4K Read
Avg. 4K Random Read Speed 		29.1 MB/s Faster random read.
+15% 		25.4 MB/s
4K Write
Avg. 4K Random Write Speed 		75.7 MB/s Faster random write.
+26% 		59.9 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		262 MB/s 333 MB/s Faster mixed IO speed.
+27%
4K Mixed
Avg. 4K Random Mixed IO Speed 		34.6 MB/s Faster random mixed IO.
+23% 		28.2 MB/s
SusWrite
Avg. Sustained Write Speed 		244 MB/s 333 MB/s Much faster sustained write speed.
+36%
Peak Score 
+7%
Read
Peak Sequential Read Speed 		502 MB/s 502 MB/s
Write
Peak Sequential Write Speed 		476 MB/s Faster peak write speed.
+14% 		417 MB/s
4K Read
Peak 4K Random Read Speed 		37.8 MB/s Faster peak random read.
+19% 		31.8 MB/s
4K Write
Peak 4K Random Write Speed 		115 MB/s Much faster peak random write.
+31% 		87.5 MB/s
Mixed
Peak Sequential Mixed IO Speed 		342 MB/s 451 MB/s Much faster peak mixed IO speed.
+32%
4K Mixed
Peak 4K Random Mixed IO Speed 		49.1 MB/s Faster peak random mixed IO.
+29% 		38.2 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		355 MB/s 393 MB/s Faster peak sustained write speed.
+11%
Value & Sentiment 
+∞%
Market Share
Based on 75,746,574 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.02 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		16.2 % Hugely better value.
+285% 		4.22 %
User Rating
UBM User Rating 		52 % 52 %
Price
Price (score) 		$226 Much cheaper.
+35% 		$348
Nice To Haves 
+25%
Age
Newest 		115 Months More recent.
+23% 		149 Months
DQ Read
Peak 4K-64Thread Read Speed 		390 MB/s Much faster peak deep queue read.
+31% 		298 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		296 MB/s Slightly faster peak deep queue write.
+9% 		272 MB/s
AS-SSD Total
AS-SSD Total Score 		1,193 Pts Stronger server IO.
+21% 		983 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		243 MB/s Faster peak deep queue mixed IO.
+23% 		198 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		335 MB/s Much faster deep queue read.
+48% 		227 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		233 MB/s Slightly faster deep queue write.
+10% 		212 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		166 MB/s Much faster deep queue mixed IO.
+34% 		124 MB/s
Specifications 
Capacity
Capacity 		960GB 256GB
Conclusion 
Average Bench 84.5%
Average Bench 81.8%
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We really liked this drive when it was released back in Nov '11. It had great real world performance both with compressible and incompressible data and was powered by the Marvel 88S9174-BKK2 controller which had very few reported reliability issues. Back when the Performance Pro was released it was one of the fastest SSD's on the market and to this day is able to spar with the latest and greatest. With a real world speed index of 450.6 MB/s the Corsair currently lies just above the midway marker for real world performance and similarly for server orientated workloads the Performance Pro is just above average with its AS-SSD score of 892. These drives have been superseded by the Neutron series and the remaining available stock is significantly overpriced at 240 GBP. [Oct '12 SSDrivePro]

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Solid State Drive Rankings (Price vs Performance) April 2024 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 - 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.
How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute

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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How it works

  • - Download and run UserBenchmark
  • - CPU tests include: integer, floating and string
  • - GPU tests include: six 3D game simulations
  • - Drive tests include: read, write, sustained write and mixed IO
  • - RAM tests include: single/multi core bandwidth and latency
  • - SkillBench (space shooter) tests user input accuracy
  • - 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 current market leaders
  • - Explore your best upgrade options with a virtual PC build
  • - Compare your in-game FPS to other users with your hardware

 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?
ALL FAQs »

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The Best.
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Intel Core i5-13600K $269Nvidia RTX 4060 $295Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $177Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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