UserBenchmark: OCZ Vertex 4 vs SanDisk Ultra II

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OCZVTX4-25SAT3-128G

BUY • $215

SanDiskSDSSDHII-240G-G25

BUY • $40

BenchYourSSD

Real World Speed

Performance profile from 73,303 user samples

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19,372 User Benchmarks

Best Bench: 104% 95GB free
Worst Bench: 64% 14GB free (System drive)

Poor: 64% Great: 104%

SPEED RANK: 358^th / 1072

53,931 User Benchmarks

Best Bench: 101% 220GB free
Worst Bench: 58% 120GB free

Poor: 58% Great: 101%

SPEED RANK: 452^nd / 1072


Effective Speed Effective SSD Speed		88.3 %	Slightly faster effective speed. +7%		82.2 %


Read Avg. Sequential Read Speed	388 MB/s		446 MB/s	Faster read speed. +15%
Write Avg. Sequential Write Speed	350 MB/s		367 MB/s	+5%
4K Read Avg. 4K Random Read Speed	26.2 MB/s		29.8 MB/s	Faster random read. +14%
4K Write Avg. 4K Random Write Speed	96.1 MB/s	Faster random write. +24%	77.3 MB/s
Mixed Avg. Sequential Mixed IO Speed	268 MB/s	Slightly faster mixed IO speed. +5%	255 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	35.5 MB/s		36.4 MB/s	+3%
SusWrite Avg. Sustained Write Speed	298 MB/s	Much faster sustained write speed. +66%	179 MB/s


Read Peak Sequential Read Speed	457 MB/s		504 MB/s	Faster peak read speed. +10%
Write Peak Sequential Write Speed	393 MB/s		477 MB/s	Faster peak write speed. +21%
4K Read Peak 4K Random Read Speed	30.4 MB/s		39.1 MB/s	Faster peak random read. +29%
4K Write Peak 4K Random Write Speed	132 MB/s	Faster peak random write. +18%	112 MB/s
Mixed Peak Sequential Mixed IO Speed	302 MB/s		352 MB/s	Faster peak mixed IO speed. +17%
4K Mixed Peak 4K Random Mixed IO Speed	42 MB/s		50 MB/s	Faster peak random mixed IO. +19%
SusWrite Peak Sequential Sustained Write 60s Average	381 MB/s	Much faster peak sustained write speed. +50%	254 MB/s

Market Share

Based on 75,668,762 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	3.89 %	20.5 %	Hugely better value. +427%
User Rating UBM User Rating	53 %	54 %	+2%
Price Price (score)	$215	$40	Hugely cheaper. +81%


Age Newest	144 Months		115 Months	More recent. +20%
DQ Read Peak 4K-64Thread Read Speed	350 MB/s		390 MB/s	Faster peak deep queue read. +11%
DQ Write Peak 4K-64Thread Write Speed	354 MB/s	Faster peak deep queue write. +14%	310 MB/s
AS-SSD Total AS-SSD Total Score	1,176 Pts		1,207 Pts	+3%
DQ Mixed Peak 4K-64Thread Mixed IO Speed	331 MB/s	Much faster peak deep queue mixed IO. +30%	254 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	307 MB/s		325 MB/s	Slightly faster deep queue read. +6%
ADQ Write Avg. 4K-64Thread Write Speed	274 MB/s	Faster deep queue write. +12%	244 MB/s
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	275 MB/s	Much faster deep queue mixed IO. +36%	202 MB/s


Capacity Capacity			128GB			240GB

The 128GB Vertex 4 has an average score of 90.5% which is the highest we have seen to date for a 120-128GB SSD. We have in excess of 100 UBM samples for the Vertex 4 and they show that the 128GB Vertex 4 performs superbly outside the lab. With peak sequential read/write speeds of 508/391 and averages of 398/325 MB/s the Vertex 4 manages to average around 75% of its peak sequential speeds, a very impressive result. The Vertex 4 was superseded by the OCZ Vertex 450 several months ago. OCZ release new versions with minor tweaks approximately every six months. Comparing the Vertex 450 to the Vertex 4 shows that the move to 20nm flash and a new Indilinx controller has reduced overall performance by around 15%, so the older Vertex 4 is actually faster than its successor. ^{[Feb '14 SSDrivePro]}

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The Sandisk Ultra II sits above Sandisk's Ultra Plus and below their Extreme Pro. The Ultra Plus would probably have been phased out completely were it not for its continued success within budget space. The Ultra II is the first Sandisk drive to utilize cheaper (and slower) TLC NAND. Similarly to the Extreme Pro, the Ultra II utilizes an nCache which operates a portion of the NAND in simulated SLC mode. This strategy also matches the one employed by Samsung's now 14 months old Evo. Comparing the Ultra II and Evo shows broad performance equivalence which given the Ultra II's 15% price discount makes it the better choice today. That said it's probably worth waiting for the release of the 850 Evo which will pack another 14 months of Samsung's market leading R&D and will probably steal the show. ^{[Sep '14 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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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?

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CPU	GPU	SSD
Intel Core i5-13600K $279	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $182	Nvidia RTX 4070 $409	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

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