CrystalDiskMark is a disk benchmark utility provides throughput data based on sequential reads and writes, and random (512K/4K/4KQD32) reads and writes of various sizes. We used both the older v3.04 and the newest v6.0.2 versions of the software, under both compressible and incompressible data modes. Below you see the results of both the older CrystalDiskMark v3.04 and the latest v6.032 versions.

Toshiba’s rated sequential speeds of up to 3,180 MB/s read and 2,960 MB/s write were confirmed, with the XG6 1TB SSD to hit 3,214 MB/s read and 3,010 MB/s write with one worker at a queue depth of 32. At QD1 the sequential read was 2142 MB/s and the sequential write was 2033 MB/s.

Toshiba's SSD left behind the ADATA XPG SX8200 drive in the SeqQ32T1 read test, although it was a bit slower than both the ADATA and Samsung 950 Pro SSDs in the sequential QD1 read benchmark:

Toshiba's 4K random read performance at QD1/QD21 was a bit slower than we expected in this benchmark, with the Samsung 950 Pro and the ADATA XPG SX8200 SSDs to be faster:

Compared to the rest drives in the chart below, the Toshiba XG6 SSD was fast in both sequential and random write tests, especially at higher QDs: