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SamsungMZ-75E250B
SanDiskSDSSDXPS-240G
▲ 5640,704 ▼

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

VS
▲ 544,013 ▼

Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC. Release date: Q2 2014.

Effective Speed 
+13%
Real World Speed
Performance profile from 962,453 user samples
Benchmark your SSD here
951,591 User Benchmarks
Best Bench: 124% 140GB free
Worst Bench: 72% 233GB free
Poor: 72% Great: 124%
SPEED RANK: 251st / 1080
10,862 User Benchmarks
Best Bench: 114% 83GB free (System drive)
Worst Bench: 65% 20GB free (System drive)
Poor: 65% Great: 114%
SPEED RANK: 316th / 1080
Effective Speed
Effective SSD Speed 		103 % Faster effective speed.
+13% 		91.7 %
Average Score 
+18%
Read
Avg. Sequential Read Speed 		466 MB/s +2% 455 MB/s
Write
Avg. Sequential Write Speed 		434 MB/s Slightly faster write speed.
+7% 		406 MB/s
4K Read
Avg. 4K Random Read Speed 		39.4 MB/s Much faster random read.
+36% 		28.9 MB/s
4K Write
Avg. 4K Random Write Speed 		94.6 MB/s Faster random write.
+24% 		76.5 MB/s
Mixed
Avg. Sequential Mixed IO Speed 		370 MB/s Much faster mixed IO speed.
+43% 		258 MB/s
4K Mixed
Avg. 4K Random Mixed IO Speed 		52.2 MB/s Much faster random mixed IO.
+56% 		33.4 MB/s
SusWrite
Avg. Sustained Write Speed 		247 MB/s 350 MB/s Much faster sustained write speed.
+42%
Peak Score 
+13%
Read
Peak Sequential Read Speed 		507 MB/s 509 MB/s +0%
Write
Peak Sequential Write Speed 		492 MB/s +3% 479 MB/s
4K Read
Peak 4K Random Read Speed 		47.6 MB/s Much faster peak random read.
+34% 		35.6 MB/s
4K Write
Peak 4K Random Write Speed 		129 MB/s Faster peak random write.
+14% 		113 MB/s
Mixed
Peak Sequential Mixed IO Speed 		416 MB/s Much faster peak mixed IO speed.
+32% 		316 MB/s
4K Mixed
Peak 4K Random Mixed IO Speed 		64.6 MB/s Much faster peak random mixed IO.
+52% 		42.4 MB/s
SusWrite
Peak Sequential Sustained Write 60s Average 		328 MB/s 480 MB/s Much faster peak sustained write speed.
+46%
Value & Sentiment 
+∞%
Market Share
Based on 77,603,268 SSDs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.69 % Insanely higher market share.
+∞% 		0 %
Value
Value For Money 		13.4 % 13.7 % +2%
User Rating
UBM User Rating 		56 % +4% 54 %
Price
Price (score) 		$100 $79 Cheaper.
+21%
Nice To Haves 
+36%
Age
Newest 		119 Months +5% 125 Months
DQ Read
Peak 4K-64Thread Read Speed 		386 MB/s +3% 376 MB/s
DQ Write
Peak 4K-64Thread Write Speed 		362 MB/s Slightly faster peak deep queue write.
+6% 		343 MB/s
AS-SSD Total
AS-SSD Total Score 		1,290 Pts Slightly stronger server IO.
+6% 		1,214 Pts
DQ Mixed
Peak 4K-64Thread Mixed IO Speed 		370 MB/s Hugely faster peak deep queue mixed IO.
+126% 		164 MB/s
ADQ Read
Avg. 4K-64Thread Read Speed 		354 MB/s Slightly faster deep queue read.
+9% 		325 MB/s
ADQ Write
Avg. 4K-64Thread Write Speed 		308 MB/s Faster deep queue write.
+15% 		267 MB/s
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed 		320 MB/s Hugely faster deep queue mixed IO.
+116% 		148 MB/s
Specifications 
Capacity
Capacity 		250GB 240GB
Conclusion 
Average Bench 103%
Average Bench 91.7%

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

The 240GB Sandisk Extreme Pro uses the same controller and NAND as its 13 months younger predecessor, the Extreme II. Comparing the Extreme II and Extreme Pro shows that average performance has increased by 10% but peak performance remains broadly unchanged. The Pro features an improved nCache which uses an SLC buffer to cache writes prior to writing them to the slower MLC NAND. In order to benefit from this improved caching, huge amounts of data need to be written for extended periods, an unlikely consumer scenario. Comparing core performance between the Samsung 840 Evo and Extreme Pro shows that the Extreme Pro averages around 12% faster than the Evo. The Extreme Pro also has a 10 year warranty but I wonder if SATA 3 will even be around at that time. Although the Extreme Pro has a superb performance profile it's not a game changer. [Jun '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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Solid State Drives
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