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SamsungMZ-77E250B
CrucialCT512M550SSD1
▲ 57219 ▼

Controller: Samsung MKX. Memory: Samsung 128 layer TLC V-NAND. Release date: Q1 2021.

VS
▲ 506 ▼

Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC. Release date ≤ Q2 2014.

Effective Speed 
+10%
Real World Speed
Performance profile from 19,765 user samples
Benchmark your SSD here
14,082 User Benchmarks
Best Bench: 128% 0GB free
Worst Bench: 67% 59GB free (System drive)
Poor: 67% Great: 128%
SPEED RANK: 259th / 1080
5,683 User Benchmarks
Best Bench: 111% 167GB free
Worst Bench: 65% 6GB free (System drive)
Poor: 65% Great: 111%
SPEED RANK: 310th / 1080
Effective Speed
Effective SSD Speed 		101 % Slightly faster effective speed.
+10% 		92.5 %
Average Score 
+11%
Read
Avg. Sequential Read Speed 		461 MB/s Slightly faster read speed.
+10% 		421 MB/s
Write
Avg. Sequential Write Speed 		395 MB/s 422 MB/s Slightly faster write speed.
+7%
4K Read
Avg. 4K Random Read Speed 		36.4 MB/s Much faster random read.
+38% 		26.3 MB/s
4K Write
Avg. 4K Random Write Speed 		81.9 MB/s 86.6 MB/s Slightly faster random write.
+6%
Mixed
Avg. Sequential Mixed IO Speed 		365 MB/s Faster mixed IO speed.
+24% 		295 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		45.9 MB/s Faster random mixed IO.
+24% 		36.9 MB/s
SusWrite
Avg. Sustained Write Speed 		322 MB/s 343 MB/s Slightly faster sustained write speed.
+7%
Peak Score 
+22%
Read
Peak Sequential Read Speed 		514 MB/s Faster peak read speed.
+11% 		464 MB/s
Write
Peak Sequential Write Speed 		486 MB/s +3% 470 MB/s
4K Read
Peak 4K Random Read Speed 		49.1 MB/s Much faster peak random read.
+62% 		30.3 MB/s
4K Write
Peak 4K Random Write Speed 		123 MB/s +2% 120 MB/s
Mixed
Peak Sequential Mixed IO Speed 		457 MB/s Much faster peak mixed IO speed.
+42% 		322 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		66.1 MB/s Much faster peak random mixed IO.
+49% 		44.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		396 MB/s 463 MB/s Faster peak sustained write speed.
+17%
Value & Sentiment 
+185%
Market Share
Based on 76,510,721 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.06 % Hugely higher market share.
+500% 		0.01 %
Value
Value For Money 		22.7 % Hugely better value.
+143% 		9.36 %
User Rating
UBM User Rating 		57 % More popular.
+14% 		50 %
Price
Price (score) 		$48 Hugely cheaper.
+83% 		$283
Nice To Haves 
+23%
Age
Newest 		42 Months Much more recent.
+66% 		123+ Months
DQ Read
Peak 4K-64Thread Read Speed 		389 MB/s +1% 384 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s 362 MB/s
AS-SSD Total
AS-SSD Total Score 		1291 Pts +4% 1,236 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		372 MB/s Much faster peak deep queue mixed IO.
+60% 		232 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		349 MB/s Slightly faster deep queue read.
+9% 		320 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		299 MB/s +1% 295 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		280 MB/s Much faster deep queue mixed IO.
+38% 		203 MB/s
Specifications 
Capacity
Capacity 		250GB 512GB
User Builds 
14,082
5,683
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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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  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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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?
What is sequential write speed?
What is sequential read speed?
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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?
What is the effective SSD speed index?
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The Best
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Intel Core i5-12400F $110Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $85
Intel Core i5-13600K $235Nvidia RTX 4070 $499Crucial T700 M.2 4TB $342
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