CrystalDiskMark (System Utilities - Benchmarking)

CrystalDiskMark drive speed benchmark test offers detailed information about read and write speed of your system drives. The software performs sequential read/write tests on any drive on your system. Select one or many read/write operations to build a meaningful data set of test speed information. Visual results make it easy to see read/write speed test results for your drive performance testing. The software is standalone - no install required.