Another nice little Portable and Free Benchmarking Software Tool is HDBench. It can be used to quickly test and benchmark CPU, Memory, Video, and Disk Drive performance. Also works great for Benchmarking USB Flash Drives. Although English language support is minimal, the Benchmarking Tool appears to work well.
Free Benchmark Software Utility | HDBench
Note: If you find this tool useful, you might also want to check out CrystalDiskMark. I find it even better for specifically speed testing USB flash drives and hard drives.