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SamsungMZ-V9P4T0B(W|/AM)
CrucialCT256M550SSD1
$152
▲ 65327 ▼

Release date: Q4 2023.

VS
▲ 527,484 ▼
 $152 

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

Effective Speed 
+439%
Real World Speed
Performance profile from 14,651 user samples
Benchmark your SSD here
6,318 User Benchmarks
Great bench: 616% 717GB free (System drive)
Poor bench: 303% 1.5TB free (System drive)
Poor: 303% Great: 616%
SPEED RANK: 9th / 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 		487 % Hugely faster effective speed.
+439% 		90.5 %
Average Score 
+536%
Read
Avg. Sequential Read Speed 		2,487 MB/s Hugely faster read speed.
+495% 		418 MB/s
Write
Avg. Sequential Write Speed 		3,874 MB/s Hugely faster write speed.
+831% 		416 MB/s
4K Read
Avg. 4K Random Read Speed 		79.4 MB/s Hugely faster random read.
+193% 		27.1 MB/s
4K Write
Avg. 4K Random Write Speed 		195 MB/s Hugely faster random write.
+129% 		85 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		2,948 MB/s Hugely faster mixed IO speed.
+886% 		299 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		106 MB/s Hugely faster random mixed IO.
+180% 		37.9 MB/s
SusWrite
Avg. Sustained Write Speed 		3,533 MB/s Insanely faster sustained write speed.
+1,036% 		311 MB/s
Peak Score 
+569%
Read
Peak Sequential Read Speed 		3,190 MB/s Hugely faster peak read speed.
+585% 		466 MB/s
Write
Peak Sequential Write Speed 		4,857 MB/s Hugely faster peak write speed.
+933% 		470 MB/s
4K Read
Peak 4K Random Read Speed 		94.8 MB/s Hugely faster peak random read.
+197% 		31.9 MB/s
4K Write
Peak 4K Random Write Speed 		295 MB/s Hugely faster peak random write.
+150% 		118 MB/s
Mixed
Peak Sequential Mixed IO Speed 		3,621 MB/s Hugely faster peak mixed IO speed.
+987% 		333 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		143 MB/s Hugely faster peak random mixed IO.
+208% 		46.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		4,701 MB/s Hugely faster peak sustained write speed.
+924% 		459 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,480,531 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.52 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		233 % Insanely better value.
+2,583% 		8.68 %
User Rating
UBM User Rating 		65 % More popular.
+25% 		52 %
Price
Price (score) 		$280 $152 Much cheaper.
+46%
Nice To Haves 
+438%
Age
Newest 		13 Months Hugely more recent.
+90% 		127 Months
DQ Read
Peak 4K-64Thread Read Speed 		2,277 MB/s Hugely faster peak deep queue read.
+488% 		387 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		1,855 MB/s Hugely faster peak deep queue write.
+414% 		361 MB/s
AS-SSD Total
AS-SSD Total Score 		6,803 Pts Hugely stronger server IO.
+448% 		1,240 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		2,062 MB/s Hugely faster peak deep queue mixed IO.
+759% 		240 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		1,580 MB/s Hugely faster deep queue read.
+408% 		311 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		1,177 MB/s Hugely faster deep queue write.
+317% 		282 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		1,370 MB/s Hugely faster deep queue mixed IO.
+582% 		201 MB/s
Specifications 
Capacity
Capacity 		4TB 256GB
Conclusion 
Average Bench 487%
Average Bench 90.5%

The Samsung 990 Pro has a strong consumer performance profile. It offers burst read speeds of 3 GB/s and burst write speeds of 5 GB/s. The 990 Pro also offers respectable out of cache performance. At current prices (1TB $120 USD, 2TB $165 USD and 4TB $320 USD) the Samsung 990 Pro offers worse value for money than the WD Black SN850X. Samsung’s superior SSD technology allowed them to dominate the consumer market since SSDs became mainstream in 2010. However, in today’s market, their technology no longer justifies a price premium. [Jun '24 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
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?
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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?
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The Best
CPUGPUSSD
Intel Core i5-12600K $169Nvidia RTX 4060 $296WD Black SN850X M.2 2TB $135
Intel Core i5-12400F $111Nvidia RTX 4060-Ti $345WD Black SN850X M.2 1TB $84
Intel Core i5-13600K $225Nvidia RTX 4070 $500Crucial T700 M.2 4TB $350
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