What are the maximum safe frequencies for PCI and AGP?

[dp004i]

My mobo (Via P4PB) doesn't have AGP/PCI lock, do you think my card will start crapping out if I bump the FSB to 150MHz (37.2 PCI, 74.44 AGP)?
EDIT: Seems to work at 150, wonder if it will go any higher. I need faster memory...

 

[Peter]

Safe frequencies for PCI and AGP are 33 and 66 MHz respectively. Anything above is at your own risk.

 

[Occifer]

Originally posted by: dp004i
My mobo (Via P4PB) doesn't have AGP/PCI lock, do you think my card will start crapping out if I bump the FSB to 150MHz (37.2 PCI, 74.44 AGP)?
EDIT: Seems to work at 150, wonder if it will go any higher. I need faster memory...

My system has been running at 150fsb w/no PCI/AGP lock for about six months. Everyting seems to be fine. GeForce 4 4400, WD800JB, and an SB Live 5.1

Next time I am gonna get a board w/ locks though.

 

[rogue1979]

Technically, anything above 33MHz/66MHz can be unstable. However, I have run systems stable at above 40MHz/80MHz. Generally speaking, most systems/components will not have a problem with overclocking to 37.5MHz/75MHz, this seems to be "relatively" safe (providing your RAM and motherboard are up to the task).

 

[oldfart]

I agree with the above. 37.5/75 is "safe". 40/80 is what I would say is the limit. Since I use Intel chipset boards which have PCI/AGP lock, it's no longer an issue.

 

[hmsrolst]

Most AGP video cards made in the last few years have no problem running at 89mhz. Anybody who runs a BX board at 133mhz FSB is at that level. I'm running 4 with no problem and I've used Matrox, Nvidia and ATI video cards and have yet to find one that's been unstable. Getting over 37.5mhz on PCI can be a problem, but it's very dependent on the particular PCI card.