UserBenchmark: OCZ Vertex 450 vs SanDisk Extreme II

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OCZVTX450-25SAT3-128G

BUY • $80

SanDiskSDSSDXP-120G-G25

$130

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Real World Speed

Performance profile from 3,502 user samples

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1,040 User Benchmarks

Best Bench: 90% 130GB free
Worst Bench: 57% 72GB free (System drive)

Poor: 57% Great: 90%

SPEED RANK: 569^th / 1074

2,462 User Benchmarks

Best Bench: 101% 112GB free
Worst Bench: 59% 87GB free

Poor: 59% Great: 101%

SPEED RANK: 410^th / 1074


Effective Speed Effective SSD Speed		75.5 %			84.8 %	Faster effective speed. +12%


Read Avg. Sequential Read Speed	410 MB/s		464 MB/s	Faster read speed. +13%
Write Avg. Sequential Write Speed	268 MB/s		292 MB/s	Slightly faster write speed. +9%
4K Read Avg. 4K Random Read Speed	20.1 MB/s		27.9 MB/s	Much faster random read. +39%
4K Write Avg. 4K Random Write Speed	87.6 MB/s	Faster random write. +11%	78.7 MB/s
Mixed Avg. Sequential Mixed IO Speed	263 MB/s	Faster mixed IO speed. +20%	219 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	28.2 MB/s		32.5 MB/s	Faster random mixed IO. +15%
SusWrite Avg. Sustained Write Speed	217 MB/s		260 MB/s	Faster sustained write speed. +20%


Read Peak Sequential Read Speed	459 MB/s		509 MB/s	Faster peak read speed. +11%
Write Peak Sequential Write Speed	283 MB/s		326 MB/s	Faster peak write speed. +15%
4K Read Peak 4K Random Read Speed	23.7 MB/s		34.5 MB/s	Much faster peak random read. +46%
4K Write Peak 4K Random Write Speed	132 MB/s	Faster peak random write. +11%	119 MB/s
Mixed Peak Sequential Mixed IO Speed	286 MB/s	Faster peak mixed IO speed. +14%	251 MB/s
4K Mixed Peak 4K Random Mixed IO Speed	33.7 MB/s		40.5 MB/s	Faster peak random mixed IO. +20%
SusWrite Peak Sequential Sustained Write 60s Average	274 MB/s		323 MB/s	Faster peak sustained write speed. +18%

Market Share

Based on 76,060,935 SSDs tested

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Market Share Market Share (trailing 30 days)	0 %		0 %
Value Value For Money	6.96 %	Much better value. +34%	5.19 %
User Rating UBM User Rating	51 %		51 %
Price Price (score)	$80	Much cheaper. +38%	$130


Age Newest	133 Months		133 Months
DQ Read Peak 4K-64Thread Read Speed	301 MB/s		345 MB/s	Faster peak deep queue read. +15%
DQ Write Peak 4K-64Thread Write Speed	286 MB/s		286 MB/s
AS-SSD Total AS-SSD Total Score	1,005 Pts		1,091 Pts	Slightly stronger server IO. +9%
DQ Mixed Peak 4K-64Thread Mixed IO Speed	262 MB/s	Much faster peak deep queue mixed IO. +71%	153 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	265 MB/s		300 MB/s	Faster deep queue read. +13%
ADQ Write Avg. 4K-64Thread Write Speed	249 MB/s	+4%	239 MB/s
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	227 MB/s	Much faster deep queue mixed IO. +63%	139 MB/s


Capacity Capacity			128GB			120GB

The 128GB Vertex 450 has a reasonable but somewhat unusual performance profile. The main weakness is its sequential write speed which is only 282 MB/s peak. This implies that the 128GB version has fewer NAND modules than both its larger 256GB sibling and several other leading 128GB models. Other SSDs, including some 128GB models can consistently achieve sequential write speeds in the 500 MB/s range. A handicap of this magnitude on a key performance metric would normally relegate an SSD to the lower divisions but the Vertex 450 offsets its poor sequential write speed with a record breaking 4K write speed of 158 MB/s which is the highest I have ever seen on any SSD. Overall the Vertex 450 has an average, but quirky, performance profile and is reasonably priced however there are both faster and cheaper alternatives available on the SSD leaderboard. ^{[Feb '14 SSDrivePro]}

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The 120GB Sandisk Extreme II proved to be a disappointment. I was expecting the same blistering performance as I saw on its larger 240GB sibling but that proved not to be the case. Comparing the 120GB and 240GB Extreme II's reveals that the larger 240GB version has peak speed ratings that are approximately 35% faster that the 120GB Extreme II. The main weakness of the 120GB Extreme II is its sequential write speed which is just 305 MB/s vs 492 MB/s on the 240GB version. Reduced write ability at lower capacities is explained by fewer NAND modules which reduce a controllers ability to parallelize slow write operations across different memory banks. Overall the Sandisk Extreme II sits amongst the bottom 20% of performers in the 120-128GB capacity category. Several of the drives in the group test have comparable performance at both the 120 and 240 GB capacities, those drives are the ones to go for. ^{[Feb '14 SSDrivePro]}

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Solid State Drive Rankings (Price vs Performance) June 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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Frequently Asked Questions

Storage Devices FAQ

What is sustained sequential write speed?

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CPU	GPU	SSD
Intel Core i5-12600K $170	Nvidia RTX 4060 $293	Crucial MX500 250GB $39
Intel Core i5-12400F $122	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-13600K $260	Nvidia RTX 4070 $550	Samsung 870 Evo 250GB $45

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $37	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $28	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $48	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $62	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

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