Problems OC'ing 8K3A

[HendrixFan]

This came as quite a suprise to me, and I have still been unable to fix my problem. I got in on the nice ARIOA 1600XP about 5-6 months ago. I paired it with an EpoX 8K3A+ and some Corsair XMS 3200 DDR RAM. First thing I did was up the FSB to 166, and everything ran fine, including temps. I couldnt go above 168 though without lockups, so back down to 166 I went. I was happy there for quite some time (no instability whatsoever), until I threw in an Adaptec 2400A RAID controller. It just wouldnt play nice with my system. After running Sisoft Sandra, it reported my PCI at 42Mhz, so it looks like the 1/5 divider on the Epox board never kicked in. What suprised me most about this was that I was able to run stable for so long at 42Mhz, until I added the Adaptec card that didnt like those speeds.

The problem is that I cant seem to get the 1/5 divider working at all, which means im running stock with my ARIOA (!!!). Is there some BIOS setting that I have missed somewhere? Is there a jumper? Anyone have a clue?

 

[mste456]

i've got an epox 8k3a mobo. my prob is that 166 mem speed sux. the sys becomes unstable on games, so i run it @ 133 and crank itup to 155x12.5 (1.95/2.60
i've got the latest bios from epox-uk.com. no news of 1/5 pci

got the dangerden, gettin the nf2 + xp2800 + 512MB Corsair PC3500

man i love overclockin

 

[ChampionAtTufshop]

theres somehting fishy....
8k3a (+) was an awesoe board for overclocking, and there (imo) has to be a 1/5 ratio (it was a kt333 board afterall i think..)

is it the new version of sandra??

 

[HendrixFan]

I will try a newer version of Sandra, and see if that is it. If the older version is misreading it, that would explain why I could "run" at 42Mhz PCI.

 

[Excelsior]

Sandra is not reading it correctly. And in the BIOS it will tell you what speed the AGP and PCI arre runnig at. But believe me, the 1/5 divider is there.

 

[ChampionAtTufshop]

Originally posted by: Excelsior
Sandra is not reading it correctly. And in the BIOS it will tell you what speed the AGP and PCI arre runnig at. But believe me, the 1/5 divider is there.

thats what i though...i mean how could ppl run at 166+ on the same board with no 1/5pci divider...
the ide would go nuts!

 

[Excelsior]

Exactly, hell I tried it on the Gigabyte 7vrxp, and it blew windows up . On the 8k3a+ it automatically kicks in. Try increasing the PCI latency a bit. It really doesn't affect the speed of any of your PCI cards, but could definitely help.