PDA

View Full Version : Recomended Driver for OCing (cpu)?


TB303
10-23-05, 07:58 PM
Hi People,
I'm trying to OC my system past the 250FSB mark, and I suspect my board - Abit Av8 3rd eye (Via K8T800pro chipset) is acting up with regards to the AGP.

I.e. I am able to get prime to run perfect at 280FSB, but the moment I try and run a game or any 3d ap, I get the Nv4_disp.dll BSOD.

I tried playing around with voltages, agpx4, Fast writes and what not but to no availe. As last resort I'm going to try different Nvidia drivers for my GPU (6800GT@stock) - I'm currently using 78.01.

I'm asking which recent drivers are known for thier Overclocking stability, just so I can eliminte the drivers as the cause of this mess...

If anyoen has any ideas or experience with this board please advise...

thanks!

My system:
A64 +3000 (Venice)
1GB DDR400
Abit AV8-3rd-eye
XFX 6800GT

rewt
10-24-05, 10:04 AM
Does that board have an option for PCI lock divider in the BIOS? The PCI bus should maintain around 33 Mhz, and the AGP 66 Mhz. Too much above this and you will start to get stability problems. Raising the FSB also raises PCI and AGP speed unless you can lock the PCI bus at 33 MHz.

TB303
10-24-05, 10:23 AM
Does that board have an option for PCI lock divider in the BIOS? The PCI bus should maintain around 33 Mhz, and the AGP 66 Mhz. Too much above this and you will start to get stability problems. Raising the FSB also raises PCI and AGP speed unless you can lock the PCI bus at 33 MHz.

Sure,
I set teh AGP lock to 66/33, I also tried the 8:2:1 divider @266fsb.
The dividers seem to work and are confirmed by other people with hardware to check the lock working.

It is something else in teh K8T800Pro chipset that crashes 3D apps at Fsb higher tha 250 EVEN if it is fully Prime stable!

Please advise,
thanks!

rewt
10-25-05, 12:11 AM
Have you tried raising memory timings and/or chipset voltage?

TB303
10-27-05, 08:09 PM
Have you tried raising memory timings and/or chipset voltage?

yes I have, without much success.

What DID help though, was a suggestion to increase PCI latency, from 32 to 128 - and this enabled me to actually finish 3Dmark05 @ 2.4Ghz.

However, it appears as if the 66Mhz AGP lock doesn't really function on this board so I am forced to yoru the 8:2:1 divider - and therefore limited to 267Mhzx9.

One question though, how high can I increase AGP voltage before I damage my dear GFX card? thanks!

$n][pErMan
10-27-05, 09:09 PM
yes I have, without much success.

What DID help though, was a suggestion to increase PCI latency, from 32 to 128 - and this enabled me to actually finish 3Dmark05 @ 2.4Ghz.

However, it appears as if the 66Mhz AGP lock doesn't really function on this board so I am forced to yoru the 8:2:1 divider - and therefore limited to 267Mhzx9.

One question though, how high can I increase AGP voltage before I damage my dear GFX card? thanks!
DONT TOUCH THE AGP VOLTAGE OR YOUR CARD WILL FRY AND WE WILL ALL LAUGH AT YOU! :D :p

TB303
10-28-05, 05:00 AM
Are you serious?
What if you OC your GFX? are you not allowed to increase the voltage from 1.5 to 1.6??

at all?

GOZ
10-28-05, 10:56 PM
I have had mine @1.65 for over a year and its fine, BFG 6800 NU @ 300/421/900