UserBenchmark: Samsung 840 Pro vs SanDisk Extreme

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SamsungMZ-7PD256BW

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SanDiskSDSSDXPS-240G

BUY • $79

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Real World Speed

Performance profile from 83,981 user samples

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73,119 User Benchmarks

Best Bench: 116% 238GB free
Worst Bench: 68% 11GB free (System drive)

Poor: 68% Great: 116%

SPEED RANK: 279^th / 1072

10,862 User Benchmarks

Best Bench: 114% 83GB free (System drive)
Worst Bench: 65% 20GB free (System drive)

Poor: 65% Great: 114%

SPEED RANK: 308^th / 1072


Effective Speed Effective SSD Speed		95 %	+4%		91.7 %


Read Avg. Sequential Read Speed	459 MB/s	+1%	455 MB/s
Write Avg. Sequential Write Speed	367 MB/s		406 MB/s	Faster write speed. +11%
4K Read Avg. 4K Random Read Speed	31 MB/s	Slightly faster random read. +7%	28.9 MB/s
4K Write Avg. 4K Random Write Speed	85.6 MB/s	Faster random write. +12%	76.5 MB/s
Mixed Avg. Sequential Mixed IO Speed	303 MB/s	Faster mixed IO speed. +17%	258 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	39.5 MB/s	Faster random mixed IO. +18%	33.4 MB/s
SusWrite Avg. Sustained Write Speed	312 MB/s		350 MB/s	Faster sustained write speed. +12%


Read Peak Sequential Read Speed	510 MB/s	+0%	509 MB/s
Write Peak Sequential Write Speed	480 MB/s	+0%	479 MB/s
4K Read Peak 4K Random Read Speed	36.1 MB/s	+1%	35.6 MB/s
4K Write Peak 4K Random Write Speed	114 MB/s	+1%	113 MB/s
Mixed Peak Sequential Mixed IO Speed	368 MB/s	Faster peak mixed IO speed. +16%	316 MB/s
4K Mixed Peak 4K Random Mixed IO Speed	47.6 MB/s	Faster peak random mixed IO. +12%	42.4 MB/s
SusWrite Peak Sequential Sustained Write 60s Average	477 MB/s		480 MB/s	+1%

Market Share

Based on 75,650,737 SSDs tested

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Market Share Market Share (trailing 30 days)	0.04 %	Insanely higher market share. +∞%	0 %
Value Value For Money	7.72 %		13.7 %	Much better value. +78%
User Rating UBM User Rating	54 %		54 %
Price Price (score)	$190		$79	Much cheaper. +58%


Age Newest	138 Months		118 Months	More recent. +14%
DQ Read Peak 4K-64Thread Read Speed	385 MB/s	+2%	376 MB/s
DQ Write Peak 4K-64Thread Write Speed	334 MB/s		343 MB/s	+3%
AS-SSD Total AS-SSD Total Score	1,221 Pts	+1%	1,214 Pts
DQ Mixed Peak 4K-64Thread Mixed IO Speed	176 MB/s	Slightly faster peak deep queue mixed IO. +7%	164 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	346 MB/s	Slightly faster deep queue read. +6%	325 MB/s
ADQ Write Avg. 4K-64Thread Write Speed	262 MB/s		267 MB/s	+2%
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	147 MB/s		148 MB/s	+1%


Capacity Capacity			256GB			240GB

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. ^{[Jun '13 SSDrivePro]}

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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]}

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

Welcome to our 2.5" and M.2 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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CPU	GPU	SSD
Intel Core i5-13600K $279	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $134	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184	Nvidia RTX 4070 $409	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $39	Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40	SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35	Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43	SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51	G.SKILL Trident Z DDR4 3200 C14 4x16GB $351	SanDisk Ultra Fit 32GB $16

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