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OCZVTX450-25SAT3-256G
$206
CrucialCT256M550SSD1
$152
▲ 51921 ▼
 $206 

Controller: Indilinx Barefoot 3 M10 IDX500M10-BC. Flash Memory: IMFT Synchronous 20nm MLC. Release date: Q2 2013.

VS
▲ 527,484 ▼
 $152 

Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC. Release date: Q1 2014.

Effective Speed 
+5%
Real World Speed
Performance profile from 8,742 user samples
Benchmark your SSD here
409 User Benchmarks
Best Bench: 105% 113GB free
Worst Bench: 62% 192GB free (System drive)
Poor: 62% Great: 105%
SPEED RANK: 389th / 1080
8,333 User Benchmarks
Best Bench: 113% 106GB free
Worst Bench: 60% 231GB free
Poor: 60% Great: 113%
SPEED RANK: 328th / 1080
Effective Speed
Effective SSD Speed 		86.4 % 90.5 % +5%
Average Score 
+4%
Read
Avg. Sequential Read Speed 		441 MB/s Slightly faster read speed.
+6% 		418 MB/s
Write
Avg. Sequential Write Speed 		438 MB/s Slightly faster write speed.
+5% 		416 MB/s
4K Read
Avg. 4K Random Read Speed 		19.4 MB/s 27.1 MB/s Much faster random read.
+40%
4K Write
Avg. 4K Random Write Speed 		83.4 MB/s 85 MB/s +2%
Mixed
Avg. Sequential Mixed IO Speed 		387 MB/s Faster mixed IO speed.
+29% 		299 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		26 MB/s 37.9 MB/s Much faster random mixed IO.
+46%
SusWrite
Avg. Sustained Write Speed 		371 MB/s Faster sustained write speed.
+19% 		311 MB/s
Peak Score 
+0%
Read
Peak Sequential Read Speed 		511 MB/s Slightly faster peak read speed.
+10% 		466 MB/s
Write
Peak Sequential Write Speed 		494 MB/s Slightly faster peak write speed.
+5% 		470 MB/s
4K Read
Peak 4K Random Read Speed 		23.2 MB/s 31.9 MB/s Much faster peak random read.
+37%
4K Write
Peak 4K Random Write Speed 		127 MB/s Slightly faster peak random write.
+8% 		118 MB/s
Mixed
Peak Sequential Mixed IO Speed 		494 MB/s Much faster peak mixed IO speed.
+48% 		333 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		34.2 MB/s 46.4 MB/s Much faster peak random mixed IO.
+36%
SusWrite
Peak Sequential Sustained Write 60s Average 		467 MB/s +2% 459 MB/s
Value & Sentiment 
�%
Market Share
Based on 76,303,129 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0 %
Value
Value For Money 		6.61 % 8.68 % Much better value.
+31%
User Rating
UBM User Rating 		51 % 52 % +2%
Price
Price (score) 		$206 $152 Cheaper.
+26%
Nice To Haves 
+8%
Age
Newest 		134 Months 123 Months Slightly more recent.
+8%
DQ Read
Peak 4K-64Thread Read Speed 		335 MB/s 387 MB/s Faster peak deep queue read.
+16%
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s +0% 361 MB/s
AS-SSD Total
AS-SSD Total Score 		1,163 Pts 1,240 Pts Slightly stronger server IO.
+7%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		298 MB/s Faster peak deep queue mixed IO.
+24% 		240 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		247 MB/s 311 MB/s Faster deep queue read.
+26%
ADQ Write
Avg. 4K-64Thread Write Speed 		261 MB/s 282 MB/s Slightly faster deep queue write.
+8%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		162 MB/s 201 MB/s Faster deep queue mixed IO.
+24%
Specifications 
Capacity
Capacity 		256GB 256GB
Conclusion 
Average Bench 86.4%
Average Bench 90.5%
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The Vertex 450 is the third SSD OCZ have released in the last eighteen months. The 450 features an updated version of the now somewhat proven Indilinx Barefoot controller which was first seen in the Vector just over 9 Months ago. The core performance figures for the Vertex 450 are disappointingly weaker, albeit marginally, than both the Vector (by 16%) and the Vertex 4 (by 11%). The Vertex 450 is currently retailing for more than the Vertex 4 and roughly the same as the better performing Vector so the 450 cannot be recommended at this time. That said the 450 is still amongst the top ten SSDs currently on the market and will be well worth consideration when prices drop after retailers have had a chance to build up stock. [Sep '13 SSDrivePro]

MORE DETAILS

The 256GB Crucial M550 is a welcome improvement over the 240GB M500. The new Marvel 88SS9189 controller has addressed our primary concern with the M500 which was poor sequential write speed. With sequential read/write speeds of 510/478 MB/s the M550 has a healthy core performance profile. Comparing the M550 and M500 shows that the new M550 leads on nearly every single performance metric. Unfortunately the M550 is priced significantly higher than the M500 but prices will likely drop as retailers build up stocks of the new M550. A key comparable for the M550 is the similarly priced market leading Samsung Evo. Comparing the Evo and M550 shows that the Evo is around 11% slower in terms of effective speed. [Mar '14 SSDrivePro]

MORE DETAILS

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Welcome to our 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
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Solid State Drives
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