UserBenchmark: Samsung 840 Pro vs SanDisk Ultra Plus

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SamsungMZ-7PD128BW

BUY • $150

SanDiskSDSSDHP-256G-G25

BUY • $139

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Real World Speed

Performance profile from 52,387 user samples

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34,842 User Benchmarks

Best Bench: 110% 62GB free
Worst Bench: 62% 119GB free

Poor: 62% Great: 110%

SPEED RANK: 336^th / 1072

17,545 User Benchmarks

Best Bench: 99% 168GB free
Worst Bench: 58% 238GB free

Poor: 58% Great: 99%

SPEED RANK: 469^th / 1072


Effective Speed Effective SSD Speed		89.5 %	Slightly faster effective speed. +10%		81.4 %


Read Avg. Sequential Read Speed	444 MB/s	+1%	438 MB/s
Write Avg. Sequential Write Speed	336 MB/s		347 MB/s	+3%
4K Read Avg. 4K Random Read Speed	30.5 MB/s	Faster random read. +15%	26.5 MB/s
4K Write Avg. 4K Random Write Speed	81.6 MB/s	Faster random write. +15%	71.2 MB/s
Mixed Avg. Sequential Mixed IO Speed	268 MB/s	Much faster mixed IO speed. +38%	194 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	35.9 MB/s	Faster random mixed IO. +23%	29.3 MB/s
SusWrite Avg. Sustained Write Speed	286 MB/s		297 MB/s	+4%


Read Peak Sequential Read Speed	497 MB/s	+3%	484 MB/s
Write Peak Sequential Write Speed	445 MB/s	+2%	437 MB/s
4K Read Peak 4K Random Read Speed	36.3 MB/s	Faster peak random read. +13%	32.2 MB/s
4K Write Peak 4K Random Write Speed	113 MB/s	Slightly faster peak random write. +9%	104 MB/s
Mixed Peak Sequential Mixed IO Speed	331 MB/s	Much faster peak mixed IO speed. +37%	242 MB/s
4K Mixed Peak 4K Random Mixed IO Speed	44.1 MB/s	Faster peak random mixed IO. +22%	36 MB/s
SusWrite Peak Sequential Sustained Write 60s Average	440 MB/s		440 MB/s

Market Share

Based on 75,666,107 SSDs tested

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Market Share Market Share (trailing 30 days)	0.01 %		0.02 %	Hugely higher market share. +100%
Value Value For Money	5.17 %		8.37 %	Much better value. +62%
User Rating UBM User Rating	54 %	+2%	53 %
Price Price (score)	$150		$139	Slightly cheaper. +7%


Age Newest	138 Months		135 Months	+2%
DQ Read Peak 4K-64Thread Read Speed	376 MB/s	Faster peak deep queue read. +15%	326 MB/s
DQ Write Peak 4K-64Thread Write Speed	330 MB/s	Much faster peak deep queue write. +53%	216 MB/s
AS-SSD Total AS-SSD Total Score	1,196 Pts	Stronger server IO. +21%	987 Pts
DQ Mixed Peak 4K-64Thread Mixed IO Speed	155 MB/s	Faster peak deep queue mixed IO. +21%	128 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	332 MB/s	Faster deep queue read. +16%	287 MB/s
ADQ Write Avg. 4K-64Thread Write Speed	245 MB/s	Faster deep queue write. +30%	189 MB/s
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	126 MB/s	Slightly faster deep queue mixed IO. +9%	116 MB/s


Capacity Capacity			128GB			256GB

The 128GB 840 Pro is a rock solid performer. On release, nearly a year and a half ago, the Pro smashed several speed records. Today, with sequential read/write speeds of 519/438 MBps, the Pro is still one of the fastest SSDs available. One of the Pro's top competitors is Samsungs own, newer 840 Evo. Looking at a raw synthetic speed comparison of the 128GB Pro and Evo is a little misleading. On the face of it the Pro only has a marginal lead over the Evo. This due to the fact that the Evo can only maintain its burst write speed for transfers of up to 3GB, the size of its SLC cache. The Pro on the other hand can sustain higher throughputs indefinitely. The Pro also utilizes MLC which is rated for far more erase cycles than the TLC used in the Evo. Server IO is often continuous and would quickly exhaust the 3GB cache on the Evo but for typical consumer use the Evo will remain within the SLC cache most of the time. ^{[Feb '14 SSDrivePro]}

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The Sandisk Ultra Plus has an above average consumer performance profile and is available at a fantastic price. It's one of the cheapest SSD's we have reviewed and we like it a lot. With a real world speed of 488.1 MB/s and an AS-SSD Total score of 910 points, the Ultra Plus is able to handle consumer workloads reasonably well and enterprise workloads just below average. The slightly below average server performance is primarily due to the Ultra's deep queue 4k write speed which clocked in at just 165 MB/s, considerably below the group average of 241 MB/s. Given that this drive is only a few months old, there is a good chance that its prices will drop even further which would make it an even better value consumer proposition than it already is. ^{[Apr '13 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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Welcome to our PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best value for money upgrades.

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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?

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What is 4K 64 thread write speed?

Can CPU power saving states (C1,C2,C3) impact SSD speed?

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CPU	GPU	SSD
Intel Core i5-13600K $279	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $133	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $182	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) $30	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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