The Toshiba OCZ RD400 (256GB, 512GB, 1TB) M.2 PCIe SSD Review

AnandTech Storage Bench - Heavy

Our Heavy storage benchmark is proportionally more write-heavy than The Destroyer, but much shorter overall. The total writes in the Heavy test aren't enough to fill the drive, so performance never drops down to steady state. This test is far more representative of a power user's day to day usage, and is heavily influenced by the drive's peak performance. The Heavy workload test details can be found here.

Samsung's PCIe 3 SSDs all clearly outclass the RD400 on the Heavy test, but the RD400 is slightly ahead of the Intel SSD 750 and much faster than everything else.

Average service time on the Heavy test shows clear separation between drive classes. The RD400 is relatively slow for a PCIe 3 SSD, but has less than half the latency of the good SATA drives and is five to ten times better than low-end TLC SATA drives.

The inclusion of a few TLC SATA drives shows how almost everything else handles the Heavy test without being overwhelmed, but the RD400 is also clearly lagging behind the other PCIe 3 drives and the 256GB model needs to perform better when full.

The three capacities of the RD400 all use very similar amounts of energy over the Heavy test, and significantly more than the other drives we've measured.