SamsungMZ-77Q4T0B(W|/AM)
SamsungMZ-75E250B

Release date ≈ Q3 2020.

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

Real World Speed
Performance profile from 961,619 user samples
10,028 User Benchmarks
Best Bench: 128% 2.5TB free
Worst Bench: 70% 1.5TB free
Poor: 70% Great: 128%
SPEED RANK: 240th / 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
105 % +2% 103 %
Read
Avg. Sequential Read Speed
478 MB/s +3% 466 MB/s
Write
Avg. Sequential Write Speed
412 MB/s 434 MB/s Slightly faster write speed.
+5%
4K Read
Avg. 4K Random Read Speed
33.5 MB/s 39.4 MB/s Faster random read.
+18%
4K Write
Avg. 4K Random Write Speed
88.3 MB/s 94.6 MB/s Slightly faster random write.
+7%
Mixed
Avg. Sequential Mixed IO Speed
389 MB/s Slightly faster mixed IO speed.
+5%
370 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed
46.2 MB/s 52.2 MB/s Faster random mixed IO.
+13%
SusWrite
Avg. Sustained Write Speed
382 MB/s Much faster sustained write speed.
+55%
247 MB/s
Read
Peak Sequential Read Speed
515 MB/s +2% 507 MB/s
Write
Peak Sequential Write Speed
491 MB/s 492 MB/s +0%
4K Read
Peak 4K Random Read Speed
40.7 MB/s 47.6 MB/s Faster peak random read.
+17%
4K Write
Peak 4K Random Write Speed
126 MB/s 129 MB/s +2%
Mixed
Peak Sequential Mixed IO Speed
447 MB/s Slightly faster peak mixed IO speed.
+7%
416 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed
59 MB/s 64.6 MB/s Slightly faster peak random mixed IO.
+9%
SusWrite
Peak Sequential Sustained Write 60s Average
488 MB/s Much faster peak sustained write speed.
+49%
328 MB/s
Market Share
Based on 76,205,976 SSDs tested
Market Share
Market Share (trailing 30 days)
0.03 % 0.68 % Insanely higher market share.
+2,167%
Value
Value For Money
48.4 % Hugely better value.
+262%
13.4 %
User Rating
UBM User Rating
50 % 56 % More popular.
+12%
Price
Price (score)
$294 $100 Much cheaper.
+66%
Age
Newest
46+ Months Much more recent.
+60%
114 Months
DQ Read
Peak 4K-64Thread Read Speed
388 MB/s +1% 386 MB/s
DQ Write
Peak 4K-64Thread Write Speed
363 MB/s +0% 362 MB/s
AS-SSD Total
AS-SSD Total Score
1,278 Pts 1,290 Pts +1%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
370 MB/s 370 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed
344 MB/s 354 MB/s +3%
ADQ Write
Avg. 4K-64Thread Write Speed
290 MB/s 308 MB/s Slightly faster deep queue write.
+6%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
306 MB/s 320 MB/s +5%
Capacity
Capacity
4TB 250GB
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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]

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Solid State Drive Rankings (Price vs Performance) June 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]

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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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