ADATA has formally introduced its first SSDs based on 3D NAND flash memory. The
Ultimate SU800 drives are designed for price-conscious market segments and use
SATA interface, which means that they do not offer very high performance.
Nonetheless, usage of high-capacity 3D NAND chips helps the manufacturer to
increase its MTBF rating and could eventually help ADATA to offer very
competitive pricing for these drives.
The family of ADATA¡¯s Ultimate SU800 SSDs includes models with 128 GB, 256 GB,
512 GB and 1 TB capacity. The drives are based on Silicon Motion¡¯s SM2258
controller (which has four NAND flash channels and LDPC ECC technology) as well
as 3D TLC NAND flash memory from an unknown manufacturer (either IMFT or SK
Hynix). The drives come in 2.5¡±/7 mm form-factor and use SATA 6 Gbps interface.
The manufacturer claims that the Ultimate SU800 SSDs support sequential read
performance up to 560 MB/s as well as sequential write performance up to 520
MB/s when pseudo-SLC caching is used. The 128 GB model is naturally slower than
its brethren are when it comes to writing (up to 300 MB/s), but its read speed
is in line with higher-capacity SKUs. ADATA did not mention random performance
of the SSDs as well as their power consumption, but the SM2258 controller is
capable of up to 90,000 read and up to 80,000 IOPS.