Product Comparison: Kingston A400 vs Western Digital Green (WDS120G2G0A)

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General Specifications
Green (WDS120G2G0A)
About the Product
Kingston’s A400 solid-state drive dramatically improves the responsiveness of your existing system with incredible boot, loading and transfer times compared to mechanical hard drives. Powered by a latest-gen controller for read and write speeds of up to 500 MB/s and 450 MB/s.
For use in laptops and desktop computers, WD Green SSDs offer high performance and reliability to boost your daily computing activities. With comprehensive WD F.I.T. Lab certification, and available in 2.5”/7mm cased or M.2 2280 models, WD Green solid state drives are compatible with most PCs. The free WD SSD Dashboard lets you monitor your storage, and when combined with the 3-year limited warranty, upgrading your digital storage is worry-free.
Key Specs
480 GB
120 GB
Read Speed
500 Mb/s
545 Mb/s
Write Speed
450 Mb/s
465 Mb/s
What customers say about "Key Specs"
Kingston A400 Solid State Drive (2.5 Inch, SATA III)
  • This is a great ssd robust, decent speed and has never given me any problems.
  • Startup time went from a few minutes to about 15 seconds, and everything runs much faster and smoother. Good purchase!
  • My computer boots up in less than 15 secs and thats including logging in with my password set. Recommended for everyone!
  • My overall boot time including passwords, apps launching etc is around 10-15 seconds which is handy.
  • I have been using it for a few days and my boot-up time has reduced from around 4 minutes to around 30 seconds.
Western Digital Green (WDS120G2G0A) WD 120 GB Internal SSD 2.5 Inch SATA
  • This solid state drive is one of the cheapest 120GB drives available, making it appealing for older or basic office PCs.
  • Booting and loading applications is faster and the OS feels more responsive.
  • It has all the storage capacity it's supposed to. Easy to install but I think it would be nice to include the retaining screw it requires.
  • The read performance is acceptable though write is disappointing.
  • Commonly SSD performance degrades as you fill the capacity and unfortunately this drive gets hit particularly hard.
Size & Weight
0.27 in.
0.27 in.
3.93 in.
3.95 in.
2.75 in.
2.75 in.
1.44 oz.
1.12 oz.
Form Factor
Memory Chip Type
Encryption Algorithm
AES 256-bit
AES 256-bit
Fast start-up, loading and file transfers, Multiple capacities, Rugged
Shock-resistant, Ultra-low power-draw, Downloadable WD SSD Dashboard
What customers say about "Features"
Kingston A400 Solid State Drive (2.5 Inch, SATA III)
  • Very light, easy to install (unscrew case, unscrew old drive, screw in new drive).
  • The drive is very lightweight, easy to install. Seems quite fast.
  • Fairly easy to install and to clone my existing drive .I'm not disappointed!
  • Only drawback was that I thought it would be easy to clone the old drives to swap the new ones in, but that was a total pain, so ended up doing a fresh install and copying data across to new drive.
  • My issue is that there is no drive imaging software support from Kingston for the this range of SSDs, most disappointing.
Western Digital Green (WDS120G2G0A) WD 120 GB Internal SSD 2.5 Inch SATA
  • With available SATA interface, these drives offer high-performance, low power consumption, and cool operation.
  • The Green version have a SATA version 3 interface. Old PC's like my DV2 have a SATA Version 2 interface (compatable with V3) that runs at half the speed of V3.
  • SLC caching boosts write performance to quickly perform everyday tasks. Performance is really superb.
  • Ultra low power draw so you can use your laptop PC for longer periods of time. It is very very important feature for me!
  • The device arrived in a standard retail box with a few instruction on the packaging but no software or any USB to SATA connection cable to facilitate the transfer of data and operating system.
Warranty / Certifications
Manufacturer Warranty
3 year(s)
3 year(s)
Other Information

Other reviews