UserBenchmark: OCZ Vertex 450 vs Samsung 840

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BenchYourSSD

Real World Speed

Performance profile from 43,038 user samples

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41,998 User Benchmarks

Best Bench: 85% 214GB free
Worst Bench: 51% 160GB free (System drive)

Poor: 51% Great: 85%

SPEED RANK: 685^th / 1080

1,040 User Benchmarks

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

Poor: 57% Great: 90%

SPEED RANK: 575^th / 1080


Effective Speed Effective SSD Speed		69.6 %			75.5 %	Slightly faster effective speed. +8%


Read Avg. Sequential Read Speed	415 MB/s	+1%	410 MB/s
Write Avg. Sequential Write Speed	190 MB/s		268 MB/s	Much faster write speed. +41%
4K Read Avg. 4K Random Read Speed	26.1 MB/s	Faster random read. +30%	20.1 MB/s
4K Write Avg. 4K Random Write Speed	71.3 MB/s		87.6 MB/s	Faster random write. +23%
Mixed Avg. Sequential Mixed IO Speed	150 MB/s		263 MB/s	Much faster mixed IO speed. +75%
4K Mixed Avg. 4K Random Mixed IO Speed	22.5 MB/s		28.2 MB/s	Faster random mixed IO. +25%
SusWrite Avg. Sustained Write Speed	174 MB/s		217 MB/s	Faster sustained write speed. +25%


Read Peak Sequential Read Speed	485 MB/s	Slightly faster peak read speed. +6%	459 MB/s
Write Peak Sequential Write Speed	254 MB/s		283 MB/s	Faster peak write speed. +11%
4K Read Peak 4K Random Read Speed	30.2 MB/s	Faster peak random read. +27%	23.7 MB/s
4K Write Peak 4K Random Write Speed	103 MB/s		132 MB/s	Faster peak random write. +28%
Mixed Peak Sequential Mixed IO Speed	176 MB/s		286 MB/s	Much faster peak mixed IO speed. +62%
4K Mixed Peak 4K Random Mixed IO Speed	26.3 MB/s		33.7 MB/s	Faster peak random mixed IO. +28%
SusWrite Peak Sequential Sustained Write 60s Average	248 MB/s		274 MB/s	Faster peak sustained write speed. +10%

Market Share

Based on 77,066,016 SSDs tested

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Market Share Market Share (trailing 30 days)	0.04 %	Insanely higher market share. +∞%	0 %
Value Value For Money	4.67 %		6.96 %	Much better value. +49%
User Rating UBM User Rating	52 %	+2%	51 %
Price Price (score)	$239		$80	Much cheaper. +66%


Age Newest	143 Months		136 Months	+5%
DQ Read Peak 4K-64Thread Read Speed	369 MB/s	Faster peak deep queue read. +23%	301 MB/s
DQ Write Peak 4K-64Thread Write Speed	219 MB/s		286 MB/s	Much faster peak deep queue write. +31%
AS-SSD Total AS-SSD Total Score	1,022 Pts	+2%	1,005 Pts
DQ Mixed Peak 4K-64Thread Mixed IO Speed	59.3 MB/s		262 MB/s	Hugely faster peak deep queue mixed IO. +342%
ADQ Read Avg. 4K-64Thread Read Speed	318 MB/s	Faster deep queue read. +20%	265 MB/s
ADQ Write Avg. 4K-64Thread Write Speed	161 MB/s		249 MB/s	Much faster deep queue write. +55%
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	54.9 MB/s		227 MB/s	Hugely faster deep queue mixed IO. +313%


Capacity Capacity			250GB			128GB

The Samsung 840 is the budget version of the 840 Pro, the main difference between the hardware on the two drives is the type of flash memory used. The cheaper 840 uses TLC NAND which is cheaper than the MLC found in the Pro version of this drive. The performance hit as a result of the cheaper TLC memory is approximately 30%. The 840 delvers both average real world speeds (435 MB/s) and average enterprise speeds (AS-SSD Total Score 920). The relative weak spots in this drives performance profile are its write ability, where it scores just 254 MB/s in the sequential write test. The upside to the lost performance over the Pro version is a significant reduction in price which leaves this drive an average value for money proposition at its current price of £135. There are, however, better value drives to be had elsewhere including Samsungs own newly released EVO which effectively supersedes the 840. ^{[Aug '13 SSDrivePro]}

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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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