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View Full Version : Overclocking AGP bus speed.


Dazz
09-07-04, 02:14 PM
Does anyone know how much around the 6800 serise video cards can stand upto? I know that nVidia cards handle higher speed AGP clocks then ATi. Which was why i ordered an MSI 6800GT, but how much i have a 1st revision ASUS A8V which doesn't support AGP/PCI locks :rolleyes: my Radeon 9800 can take upto 219Mhz FSB @ AGP 4x but is completly unstable @ AGP 8x. Anyone tried it?

Lfctony
09-07-04, 02:47 PM
My 6800 couldn't take the extra frequency when I was running my A64@210FSB, on my K8T. That was a frequency of 70Mhz.

zoomy942
09-07-04, 03:20 PM
i dont have a 6800gt yet.. but i will soon. :) but i have oc'ed the agp bus with lots of cards and i find that the things slow down. i dont know why that is, but its always more of a bog down than help when i oc the agp bus

Dazz
09-07-04, 04:10 PM
Wooh only 70Mhz thats much at all :o i hope i will have better luck, have you decreased your HTT from 800 to 600Mhz?

55illinois
09-07-04, 04:35 PM
I've run my 6800GT (before the fan died) at an AGP bus of 78 MHz because I have an 815EP chipset the doesn't have AGP locks and only has dividers of 1/2 and 2/3 for AGP while I was running my FSB 117MHz. It worked fine.

Woodelf
09-07-04, 09:27 PM
Does anyone even notice a difference when increasing it?. I never did when benching my old GF3. Isn't the bus all ready fast enough?. :)

WeReWoLf
09-07-04, 10:36 PM
I have increased mine to like 71Mhz. It gave me an increase of about 1500 points in aquamark 3 using my old 5700

Dazz
09-08-04, 02:43 PM
AGP speeds make very little diffrence but if your board doesn't have locked PCI/AGP multiplires you have no choice.

Woodelf
09-08-04, 03:22 PM
Maybe i'll give it another try someday.

Goth
09-08-04, 05:03 PM
My 6800 Ultra runs fine with a 75mhz AGP Bus speed