What is SATA 3

Sata 3 is the 3rd revision of the computer bus interface used to connect mass storage like mechanical hard disk drives, solid state drives and optical drives like cd/dvd drives.
 
Serial Advanced Technology Attachment 1 (or Serial ATA) devices have a maximum 1.5 gigabit per second (187.5 megabyte per second) communication rate. Serial ATA 2 devices have a maximum 3 gigabits per second (375 megabyte per second) communication rate. Serial ATA 3 devices have a maximum 6 gigabits per second (750 megabytes per second) communication rate. Actual data transfer rates of Serial ATA hard disk drives are much lower than the maximum data transfer rate.

Some Solid State Drives have read transfer rates that can average around 250 megabytes per second.
 
2048Megabytes said:
The numbers I have posted are accurate. Actual data transfer rates of most Serial ATA devices are much lower than the maximum data transfer rate. Please reference here:

http://www.sata-io.org/developers/naming_guidelines.asp

Serial ATA 3 is 6 gigabits per second (or 750 megabytes per second).
Click to expand...

You need to calculate it like this: 6000000000 / 8 * 0.8 = 600000000

There is overhead. SATA speeds are also always refered to as 150, 300 and 600 MB/s.
 
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