Why do 6 gbps drives get only upto 500 mbps in read/write speeds?

[Rohan Rathi]

The title says it Why do 6 gbps drives (SSD's mainly) get only upto 500 mbps in read/write speeds?

http://www.tomshardware.com/reviews/ssd-recommendation-benchmark,3269.html

Also, here it says that "Samsung's 840 Pro and OCZ's Vector really push the SATA 6Gb/s interface to its limits". I've seen the benchmarks they too can get 550 mbps max, how is it that 500 mbps speed pushing a 6gbps interface to the limit?

 

[cin19]

The sata3 (6GB/s) has the maximum speed 600MB/s that is from wikipedia.org http://en.wikipedia.org/wiki/Serial_ATA

 

[Rohan Rathi]

Okay, it means 6 Gbits pre second not GBytes which I first thought. 6 gbits per second equals 600 megabytes of data transfer per second. Thanks!