Quest for speed: 3. Kingston UV400 SSD
Another one of the most economical SSD is the Kingston’s SSDNow UV400, the SSD that will be used for testing is a 120GB SSD.
The controller used by the SSDNow UV400 120 GiB is the Marvell 88SS1074.
With a Nanya NT5CC128M16FP-DI, 256 MiB capacity, DDR3-1600 memory chip, that works as a data buffer.
The NAND flash memory chips are from Kingston, model FT16B08UCT1, same ones from Kingston’s SSDNow V300 SSD.
Below is the official specification taken from Kingston’s web site:
Specifications
Form factor: 2.5"
Interface: SATA Rev. 3.0 (6Gb/s) – with backwards compatibility to SATA Rev. 2.0 (3Gb/s)
Capacities2: 120GB, 240GB, 480GB, 960GB
Controller: Marvell 88SS1074
NAND: TLC
Baseline Performance: Data Transfer (ATTO): 120GB — up to 550MB/s Read and 350MB/s Write
Power Consumption: 0.672W Idle / 0.693W Avg / 0.59W (MAX) Read / 2.515W (MAX) Write
Storage temperature: -40°C~85°C
Operating temperature: 0°C~70°C
Dimensions: 100.0mm x 69.9mm x 7.0mm
Weight: 57g
Vibration operating: 2.17G Peak (7–800Hz)
Vibration non-operating: 20G Peak (10–2000Hz)
Life expectancy: 1 million hours MTBF
Measurements
The hardware system configuration info can be found in -> Quest for Speed: 1. RAID 0
It is important to note that the HP z800 workstation motherboard only supports SATA II, which run with a native transfer rate of 3.0 Gbit/s. When accounted for the 8b/10b encoding scheme, equals to the maximum uncoded transfer rate of 2.4 Gbit/s (300 MB/s).
Measurements were taken using:
The official specification only mentions
"Baseline Performance: Data Transfer (ATTO): 120GB — up to 550MB/s Read and 350MB/s Write"
The AS SSD measurements shows sequential read 263MB/s and write 243 MB/s.
The result on ATTO shows read speed consistently exceeds 250 MB/sec with file size larger than 16KB. Write speed only consistently exceeds 200 MB/sec with file size larger than 8KB.
CrystalDiskMark measurements shows sequential read 282MB/s and write 268 MB/s.
Conclusion
All Write measurements seems measure up to around 60~70% of the "Baseline Performance: Data Transfer (ATTO): 120GB — up to 350MB/s Write"
All Read measurements seems measure up to around 45~50% of the "Baseline Performance: Data Transfer (ATTO): 120GB — up to 550MB/s Read"
All read and write data transfer speed hovers around 80% of SATA II maximum uncoded transfer rate of 2.4 Gbit/s (300 MB/s).