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OCZAGT4-25SAT3-256G
SamsungMZ-75E250B
▲ 51500 ▼

Controller: Indilinx Everest 2 IDX400M00. Flash Memory: Micron Asynchronous 25nm MLC. Release date: Q2 2012.

VS
▲ 5640,704 ▼

Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND. Release date: Q4 2014.

Effective Speed 
+43%
Real World Speed
Performance profile from 953,007 user samples
Benchmark your SSD here
1,416 User Benchmarks
Best Bench: 87% 238GB free
Worst Bench: 57% 185GB free (System drive)
Poor: 57% Great: 87%
SPEED RANK: 634th / 1080
951,591 User Benchmarks
Best Bench: 124% 140GB free
Worst Bench: 72% 233GB free
Poor: 72% Great: 124%
SPEED RANK: 251st / 1080
Effective Speed
Effective SSD Speed 		72.3 % 103 % Much faster effective speed.
+43%
Average Score 
+57%
Read
Avg. Sequential Read Speed 		276 MB/s 466 MB/s Much faster read speed.
+69%
Write
Avg. Sequential Write Speed 		304 MB/s 434 MB/s Much faster write speed.
+43%
4K Read
Avg. 4K Random Read Speed 		18.4 MB/s 39.4 MB/s Hugely faster random read.
+114%
4K Write
Avg. 4K Random Write Speed 		94.5 MB/s 94.6 MB/s +0%
Mixed
Avg. Sequential Mixed IO Speed 		193 MB/s 370 MB/s Hugely faster mixed IO speed.
+92%
4K Mixed
Avg. 4K Random Mixed IO Speed 		27 MB/s 52.2 MB/s Hugely faster random mixed IO.
+93%
SusWrite
Avg. Sustained Write Speed 		275 MB/s Faster sustained write speed.
+11% 		247 MB/s
Peak Score 
+52%
Read
Peak Sequential Read Speed 		336 MB/s 507 MB/s Much faster peak read speed.
+51%
Write
Peak Sequential Write Speed 		391 MB/s 492 MB/s Faster peak write speed.
+26%
4K Read
Peak 4K Random Read Speed 		21.3 MB/s 47.6 MB/s Hugely faster peak random read.
+123%
4K Write
Peak 4K Random Write Speed 		131 MB/s +2% 129 MB/s
Mixed
Peak Sequential Mixed IO Speed 		236 MB/s 416 MB/s Much faster peak mixed IO speed.
+76%
4K Mixed
Peak 4K Random Mixed IO Speed 		31.8 MB/s 64.6 MB/s Hugely faster peak random mixed IO.
+103%
SusWrite
Peak Sequential Sustained Write 60s Average 		382 MB/s Faster peak sustained write speed.
+16% 		328 MB/s
Value & Sentiment 
+∞%
Market Share
Based on 77,546,240 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0 % 0.65 % Insanely higher market share.
+∞%
Value
Value For Money 		20.9 % Much better value.
+56% 		13.4 %
User Rating
UBM User Rating 		51 % 56 % Slightly more popular.
+10%
Price
Price (score) 		$35 Much cheaper.
+65% 		$100
Nice To Haves 
+43%
Age
Newest 		150 Months 119 Months More recent.
+21%
DQ Read
Peak 4K-64Thread Read Speed 		255 MB/s 386 MB/s Much faster peak deep queue read.
+51%
DQ Write
Peak 4K-64Thread Write Speed 		316 MB/s 362 MB/s Faster peak deep queue write.
+15%
AS-SSD Total
AS-SSD Total Score 		964 Pts 1,290 Pts Much stronger server IO.
+34%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		208 MB/s 370 MB/s Much faster peak deep queue mixed IO.
+78%
ADQ Read
Avg. 4K-64Thread Read Speed 		231 MB/s 354 MB/s Much faster deep queue read.
+53%
ADQ Write
Avg. 4K-64Thread Write Speed 		235 MB/s 308 MB/s Much faster deep queue write.
+31%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		194 MB/s 320 MB/s Much faster deep queue mixed IO.
+65%
Specifications 
Capacity
Capacity 		256GB 250GB
Conclusion 
Average Bench 72.3%
Average Bench 103%

The OCZ Agility 4 is a relatively old SSD and has been included in the group test as a reference. In terms of overall speed the Agility 4 lags the current ten market leaders by an average of around 30%, considering that the Agility 4 is only 16 months old this highlights just how quickly the SSD market has evolved over the last two years. It's probably not worth upgrading for the sake of more speed unless you have a specific use case that demands it but if you are looking for a speed upgrade, you will gain up to around 50% by going for the Samsung 840 Pro or the OCZ Vector. [Sep '13 SSDrivePro]

MORE DETAILS

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders. [Dec '14 SSDrivePro]

MORE DETAILS

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Solid State Drive Rankings (Price vs Performance) November 2024 SSD Rankings

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]

Group Test Results

  • 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?
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What is sequential write 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?
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Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
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The Best
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Intel Core i5-12600K $159Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $84
Intel Core i5-12400F $111Nvidia RTX 4070 $500Crucial T700 M.2 4TB $370
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