Question bandwidth calculation

[Koblerville]

Can someone check out my bandwidth calculation below? I end up with 750 MBps for the bandwidth of the SATA-600 bus even though Scott Mueller gets 600 MBps in his book**. Is there something wrong in my calculation in that I should get 600 MBps? Thank you.

6000 MHz X 1 data cycle per clock = 6000 MTps X 1 bit width = 6000 mbps /8 bytes = 750 MBps

SATA-600

Bus Width (bits) Bus Speed (MHz) Data Cycles per Clock Bandwidth (MBps)
1 6000 1 600


**Upgrading and Repairing PCs, 14th edition, by Scott Mueller, table 4.26

 

[kerberos_20]

its 6000mhz, that is 6Mbits
from every 10 bits only 8bits are used for data transfers, 2bits are for something else
So from 6Mbits only 80% is actual data transfer
6mbit = 750MB / 80% = 600MB

 

[Koblerville]

its 6000mhz, that is 6Mbits
from every 10 bits only 8bits are used for data transfers, 2bits are for something else
So from 6Mbits only 80% is actual data transfer
6mbit = 750MB / 80% = 600MB

Got it, thank you kerberos_20.