HD Tach will test the sequential read, random access and interface burst speeds of your attached storage device (hard drive, flash drive, removable drive, etc). All drive technologies such as SCSI, IDE/ATA, 1394, USB, SATA and RAID are supported. Test results from HD Tach can be used to confirm manufacturer specs, analyze your system for proper performance, and compare your performance with others. HD Tach is very easy to use, quick, and presents data in easy to read graphs, including the ability to compare two storage devices on screen at the same time for easy analysis.
In our burst test on HDTach, the iRAM comes in as the fastest SATA 150 MB/s device, but it is still passed by the Western Digital SE16 drive that runs on the SATA 300 MB/s spec is able to 30 MB/s more at its peak.
The tides takes a big turn though when we look at the average transfer rates instead of the burst transfer rates. While even the Raptor 74 GB pushes only 65.1 MB/s on average, the Gigabyte iRAM can push 131.6 MB/s as the average! Obviously the sustained transfer rates on the iRAM are going to exceed hard drives for the foreseeable future.
The average random access time on the iRAM is pretty much 0 here while the fastest hard drives are able to 7.7 ms access time.
Though the iRAM does use more CPU time than the rest of the hard drives in our tests, the 4% that HDTach reports is still very low.