UserBenchmark: Samsung 850 Evo vs WDC PC SN520 SDAPMUW-512G

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Real World Speed

Performance profile from 834 user samples

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69 User Benchmarks

Best Bench: 208% 477GB free
Worst Bench: 114% 325GB free

Poor: 114% Great: 208%

SPEED RANK: 129^th / 1072

765 User Benchmarks

Best Bench: 133% 2.5TB free
Worst Bench: 85% 965GB free

Poor: 85% Great: 133%

SPEED RANK: 203^rd / 1072


Effective Speed Effective SSD Speed		172 %	Much faster effective speed. +53%		113 %


Read Avg. Sequential Read Speed	885 MB/s	Hugely faster read speed. +86%	475 MB/s
Write Avg. Sequential Write Speed	847 MB/s	Hugely faster write speed. +94%	436 MB/s
4K Read Avg. 4K Random Read Speed	40 MB/s	+3%	39 MB/s
4K Write Avg. 4K Random Write Speed	132 MB/s	Much faster random write. +50%	87.8 MB/s
Mixed Avg. Sequential Mixed IO Speed	795 MB/s	Hugely faster mixed IO speed. +98%	402 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	57.7 MB/s	Faster random mixed IO. +12%	51.7 MB/s
SusWrite Avg. Sustained Write Speed	596 MB/s	Much faster sustained write speed. +38%	432 MB/s


Read Peak Sequential Read Speed	1206 MB/s	Hugely faster peak read speed. +136%	510 MB/s
Write Peak Sequential Write Speed	1279 MB/s	Hugely faster peak write speed. +162%	489 MB/s
4K Read Peak 4K Random Read Speed	47.8 MB/s	+3%	46.5 MB/s
4K Write Peak 4K Random Write Speed	180 MB/s	Much faster peak random write. +43%	126 MB/s
Mixed Peak Sequential Mixed IO Speed	1093 MB/s	Hugely faster peak mixed IO speed. +148%	441 MB/s
4K Mixed Peak 4K Random Mixed IO Speed	73 MB/s	Faster peak random mixed IO. +13%	64.6 MB/s
SusWrite Peak Sequential Sustained Write 60s Average	790 MB/s	Much faster peak sustained write speed. +62%	488 MB/s

Market Share

Based on 75,634,111 SSDs tested

See market share leaders


Market Share Market Share (trailing 30 days)		0 %			0 %
User Rating UBM User Rating		50 %			50 %


Age Newest	65+ Months	More recent. +29%	91+ Months
DQ Read Peak 4K-64Thread Read Speed	1081 MB/s	Hugely faster peak deep queue read. +180%	386 MB/s
DQ Write Peak 4K-64Thread Write Speed	1147 MB/s	Hugely faster peak deep queue write. +226%	352 MB/s
AS-SSD Total AS-SSD Total Score	3,357 Pts	Hugely stronger server IO. +163%	1,274 Pts
DQ Mixed Peak 4K-64Thread Mixed IO Speed	1078 MB/s	Hugely faster peak deep queue mixed IO. +196%	364 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	878 MB/s	Hugely faster deep queue read. +164%	332 MB/s
ADQ Write Avg. 4K-64Thread Write Speed	781 MB/s	Hugely faster deep queue write. +178%	281 MB/s
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	848 MB/s	Hugely faster deep queue mixed IO. +186%	296 MB/s


Capacity Capacity			512GB			4TB

i sell child to buy good ssd ^{[Apr '19 userbanchmark]}

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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]

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.

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute

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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How it works

- Download and run UserBenchmark
- CPU tests include: integer, floating and string
- GPU tests include: six 3D game simulations
- Drive tests include: read, write, sustained write and mixed IO
- RAM tests include: single/multi core bandwidth and latency
- SkillBench (space shooter) tests user input accuracy
- Reports are generated and presented on userbenchmark.com
- Identify the strongest components in your PC
- See speed test results from other users
- Compare your components to the current market leaders
- Explore your best upgrade options with a virtual PC build
- Compare your in-game FPS to other users with your hardware

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?

What is sequential write speed?

What is sequential read speed?

What is incompressible data?

What is queue depth?

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?

What is the effective SSD speed index?

How is the AS SSD write score calculated?

How is the AS SSD read score calculated?

How is the AS SSD total score calculated?

ALL FAQs »

CPU	GPU	SSD
Intel Core i5-13600K $273	Nvidia RTX 4060 $300	Crucial MX500 250GB $40
Intel Core i5-12400F $132	Nvidia RTX 4060-Ti $385	Samsung 850 Evo 120GB $80
Intel Core i5-12600K $186	Nvidia RTX 4070 $409	Samsung 860 Evo 250GB $52

HDD	RAM	USB
Seagate Barracuda 1TB (2016) $34	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