WD Green 120 GiB SSD Review

Introduction

We tested another entry SSD, the WD Green 120 GiB SSD Review from Western Digital. Let’s seek how does it perform against its competitors. Check it out!

Recently, we tested three new-generation entry SSDs: the Corsair Force LE, the Kingston SSDNow UV400, and the SanDisk SSD Plus, which are some of the most inexpensive SSDs available today. Now we are including a new inexpensive SSD: the WD Green.

Before proceeding, we highly suggest that you read our “Anatomy of SSD Units” tutorial, which provides all the background information you need to know about SSDs.

Just like the Kingston UV400 and the Force LE, the WD Green SSD uses TLC (triple level cell) memories. This kind of memory stores not two, as on most MLC memory chips, but three bits instead. It allows a higher data density and, thus, a smaller manufacturing cost for a same capacity chip.

The issues with TLC memory chips, compared to the two-bit MLC chips (and even more compared to the SLC memory chip, that store only one bit per cell) are the smaller speed (due to the error correcting mechanism) and a shorter lifespan, because there is more cell wearing on the erasing process (executed before writing new data).

The TBW (total bytes written, which means the amount of data written on the drive before it begin to experience tearing problems) for this model is 40 TiB . Obviously, this is a very high number and must not worry home users, but it makes this model inadvisable for applications that need a big amount of data writing, like servers, for example.

In the table below, we compared the tested units. All of them use SATA-600 interface and the 2.5” form factor, with 7 mm height.

Manufacturer

Model

Model #

Nominal capacity

Price

Western Digital

WD Green

WDS120G1G0A

120 GiB

USD 55

Corsair

Force LE

CSSD-F120GBLEB

120 GiB

USD 50

Kingston

SSDNow UV400

SUV400S37/120G

120 GiB

USD 41

SanDisk

SSD PLUS

SDSSDA-120G

120 GiB

USD 45

In the table below, we compared technical specs of the tested drives.

Model Controller Buffer Memory
WD Green Silicon Motion SM2258XT 4x 32 GiB SanDisk 05497 032G
Corsair Force LE Phison PS3110-S10C-12 256 MiB Nanya NT5CC128M16IP-DI 4x 32 GiB Toshiba TT58G51ARA
Kingston SSDNow UV400 Marvell 88SS1074 256 MiB Nanya NT5CC128M16FP-DI 8x 16 GiB Kingston FT16B08UCT1-0F
SanDisk SSD PLUS Silicon Motion SM2246XT 2x 64 GiB SanDisk 05446 064G

Author: Rafael Coelho

Rafael Otto Coelho is a physicist with a master's degree in Education, and is a college professor in Brazil.

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