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Introduction

This time we tested one more value SSD, the WD Green 240 GiB. Let’s see how it performs, comparing it to other SSDs with the same capacity.

Recently, we tested the 120 GiB WD Green, but we know SSDs from different capacities, even from the same model, have different performances. Because of this, now we tested the 240 GiB model from the same line, which is the most recent entry-level SSD family from Western Digital.

As most of the recent entry SSDs, the WD Green 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 main issue 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) is the smaller lifespan, because there is more cell wearing on the erasing process (executed before writing new data), which reflects in a smaller TBW (Total Bytes Written, which means the amount of data that can be written to the drive before it can have problems). This value is usually very high and will not be a problem for typical home usage, but it makes these models 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. All the tested drives have 256 GiB total memory, but they are sold as 240 GiB because 16 GiB are reserved for “overprovisioning”.

Manufacturer

Model

Model #

Nominal capacity

Price

Western Digital

WD Green

WDS240G1G01

240 GiB

USD 78

Kingston

SSDNow UV400

SUV400S37/240G

240 GiB

USD 64

SanDisk

SSD PLUS

SDSSDA-240G

240 GiB

USD 70

Prices we researched at Newegg.com on the day this review was published.

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

Model Controller Buffer Memory TBW
WD Green Silicon Motion SM2258XT 4x 64 GiB SanDisk 05497 064G 80 TiB
Kingston SSDNow UV400 Marvell 88SS1074 256 MiB Nanya NT5CC128M16FP-DI 16x 16 GiB Kingston FT16B08UCT1-0F 100 TiB
SanDisk SSD PLUS Silicon Motion SM2246XT 4x 64 GiB SanDisk 05446 064G NA