Originally Posted by alk
Onboard your motherboard you have a SATA controller. This has a clockspeed, like everything else, determined from the FSB speed. If you up the FSB speed without locking the PCI bus, then the SATA controller can run to fast and write corrupted information to the disk when you try to load windows, which could corrupt your windows instalation. Its like your CPU having a rounding error in prime95 when you clock too high only on your SATA controller, if that makes sense?
It's a good thing my title is 'Overclocker In Training' because I had never heard of this until now. My PCI bus is locked steady at the default and does not move when overclocking using 3rd party software (whcih my only option) so I should be fine. When I do my next upgrade to a good overclocking motherboard I'll ensure that the PCI bus is locked there as well.