I would first of all try this option as it is the exact same option as I have on one of my Abit boards here and that option does indeed lock the AGP and PCI clocks
However on my board they are locked at 66/33MHz so slightly out of the standard locking range. However as they are within 5% I am not worried.
The chance is fair as most boards have different ways so saying "lock AGP/PCI clocks at set frequencies".
If however this option does not allow you to lock your frequencies you will be limited in your ability to overclock your computer system. As you most likely know without these locks implemented the AGP and PCI clocks will increase in conjunction to the increase in the system bus speed.
The recommended limits that you should go to without causing physical damage to the computer hardware for these locks are:
72MHz for the AGP clock and 37MHz for the PCI clock. Exceeding these limits is not recommended and may cause physical damage to hardware connected to these interfaces.
You can exceed these frequencies in certain conditions depending on the hardware that is connected to the interfaces.
Recommendations if that option does not lock the clocks:
- Purchase a motherboard with PCI-E/AGP/PCI locks implemented
- Increase your FSB until you aproach that limit then stop