UserBenchmark: Kingston SSDNow UV400 vs WD Green (2018)

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KingstonSUV400S37/120G

BUY • $35

WDWDS120G2G0A

BUY • $59

BenchYourSSD

Real World Speed

Performance profile from 150,849 user samples

Benchmark your SSD here

80,916 User Benchmarks

Best Bench: 82% 117GB free
Worst Bench: 44% 25GB free (System drive)

Poor: 44% Great: 82%

SPEED RANK: 719^th / 1072

69,933 User Benchmarks

Best Bench: 53% 111GB free
Worst Bench: 32% 45GB free (System drive)

Poor: 32% Great: 53%

SPEED RANK: 929^th / 1072


Effective Speed Effective SSD Speed		66.9 %	Much faster effective speed. +54%		43.3 %


Read Avg. Sequential Read Speed	450 MB/s	Slightly faster read speed. +9%	411 MB/s
Write Avg. Sequential Write Speed	342 MB/s	Much faster write speed. +55%	220 MB/s
4K Read Avg. 4K Random Read Speed	26.8 MB/s	Much faster random read. +46%	18.4 MB/s
4K Write Avg. 4K Random Write Speed	66.4 MB/s	Hugely faster random write. +125%	29.5 MB/s
Mixed Avg. Sequential Mixed IO Speed	198 MB/s	+3%	192 MB/s
4K Mixed Avg. 4K Random Mixed IO Speed	29.4 MB/s	Hugely faster random mixed IO. +92%	15.3 MB/s
SusWrite Avg. Sustained Write Speed	80.3 MB/s	Faster sustained write speed. +21%	66.4 MB/s


Read Peak Sequential Read Speed	499 MB/s	Slightly faster peak read speed. +10%	454 MB/s
Write Peak Sequential Write Speed	372 MB/s	Faster peak write speed. +26%	295 MB/s
4K Read Peak 4K Random Read Speed	32.5 MB/s	Much faster peak random read. +39%	23.4 MB/s
4K Write Peak 4K Random Write Speed	96.5 MB/s	Hugely faster peak random write. +133%	41.4 MB/s
Mixed Peak Sequential Mixed IO Speed	344 MB/s	Faster peak mixed IO speed. +19%	290 MB/s
4K Mixed Peak 4K Random Mixed IO Speed	40.3 MB/s	Hugely faster peak random mixed IO. +104%	19.8 MB/s
SusWrite Peak Sequential Sustained Write 60s Average	87.8 MB/s		113 MB/s	Faster peak sustained write speed. +29%

Market Share

Based on 75,661,796 SSDs tested

See market share leaders


Market Share Market Share (trailing 30 days)	0.08 %		0.23 %	Hugely higher market share. +188%
Value Value For Money	11 %	Hugely better value. +128%	4.8 %
User Rating UBM User Rating	53 %	Slightly more popular. +6%	50 %
Price Price (score)	$35	Much cheaper. +41%	$59


Age Newest	94+ Months		77+ Months	More recent. +18%
DQ Read Peak 4K-64Thread Read Speed	310 MB/s	Hugely faster peak deep queue read. +158%	120 MB/s
DQ Write Peak 4K-64Thread Write Speed	269 MB/s	Hugely faster peak deep queue write. +204%	88.5 MB/s
AS-SSD Total AS-SSD Total Score	1,001 Pts	Hugely stronger server IO. +124%	446 Pts
DQ Mixed Peak 4K-64Thread Mixed IO Speed	177 MB/s	Hugely faster peak deep queue mixed IO. +318%	42.3 MB/s
ADQ Read Avg. 4K-64Thread Read Speed	268 MB/s	Hugely faster deep queue read. +158%	104 MB/s
ADQ Write Avg. 4K-64Thread Write Speed	152 MB/s	Hugely faster deep queue write. +141%	63 MB/s
ADQ Mixed Avg. 4K-64Thread Mixed IO Speed	118 MB/s	Hugely faster deep queue mixed IO. +265%	32.3 MB/s


Capacity Capacity			120GB			120GB

greate ^{[Sep '19 rakib1971]}

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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 $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