We move on with the AS SSD benchmark, which contains five synthetic as well as three practical tests. The synthetic tests determine the sequential and the random read / write performance of an SSD. These tests are carried out without using the operating system's cache. The Seq-test measures how long it takes to read and write an 1GB file. Most importantly, this sequential benchmark uses incompressible data for all of its transfers.

The Crucial BX300 480GB SSD reached a very high score of of 1243. Sequential speeds for the drive hit the 520MB/s for reads and 480MB/s write while 4K speeds reached 32MB/s for read and 106MB/s for write:

The BX300 SSD goes head to head with the Samsung 850Pro model in the sequential read test:

The BX300 lost some ground in the 4K random read tests, although it remained very competitive. It made an impresive come back in the 4K miltithreaded read test, in which it topped the in the rank:

The performance for the BX300 SSD in the sequential write test was good adn in par with the 850 EVO's result, although not higher than the 850 Pro's:

Both the BX300 and the 850 Evo drives had almost the same performance in the 4K random write test, but Crucial's drive showed its muscles in the 4K/64 thread write benchmark:

Next up we ran the Compression Benchmark built-into AS SSD. This test uses a mix of compressible and incompressible data and outputs both Read and Write throughput of the drive.

The Crucial BX300 SSD showed a stable behavior across the board, with not significant dips in the write graph: