pci/agp lock

[fsstrike]

what is the pci agp lock? my mobo is a chaintech znf3-450gb so i know it supports it. how do i use a pci agp lock?

 

[BlueWeasel]

The PCI and AGP are two different buses in your system, and the speed of the buses are a function of the front side bus (FSB) speed. You want to try to run the PCI bus as close to the default of 33Mhz as possible, and the same thing for the AGP bus speed of 66Mhz.

Some boards have dividers that set the speed of the PCI and AGP buses. For example, if you were running at 200 FSB, then you would need a 1/6 divider for PCi and 1/3 for AGP for both buses to be running at the default.

The PCI and AGP locks on newer boards like the Nforce2 simple "locks" the buses to run at their default speeds regardless of the FSB speed. Some boards have a setting in the BIOS, while on others it can't be disabled and runs automatically. Chances are, if you know your board has PCI/AGP locks, and their is not setting in the BIOS, then the lock is automatic and always enabled.

 

[fsstrike]

Okay I understand better now. Well, I have a lock for AGP where I can set the Mhz to 66, but I do not have one for PCI, does this mean the PCI is always on by default?

 

[JBT]

the PCI bus is half the AGP bus to when you set it to 66 the PCI bus will be 33. If you set AGP to 70 it will be 35 ect ect