P5B Deluxe woes...

[Oceanborn]

Hey guys, in my adventures overclocking my ASUS P5B-Deluxe I noticed something really weird, the games were all choppy and slowing down to a crawl and after some troubleshooting I found out the problem was the Main graphics slot that is supposed to work @16x was working @1x !!!

To confirm my suspicions I ran 3dmark 03 and my Core2duo E6420 @3.2GHZ with an eVGA7900GS overclocked to 580/1600mhz scored a measly 10500 !

Just to give you an idea, my old system X2 3800+ with a 7800GT scored 17000 !!

So long story short, If my FSB goes beyond 360mhz the PEG slot runs @1x rather than 16x

Anybody here heard about this problem? maybe it's a setting that I have to change and don't know...

by the way, the PCI Bus is locked at 33mhz and the PCIex is locked at 100mhz

 

this is driving me nuts I'd appreciate any feedback from you guys

[Thraxz]

I've heard of that before. I thought the newest BIOS had fixed that problem. Otherwise... you're stuck using clockgen to clock past 360.

[Oceanborn]

Tried the latest BIOSes

the last two anyway

I can't believe this crap...if a board can't get past 360FSB is not a reason for RMA is it ? :-)

[Oceanborn]

Found the answer in another forum...

It seems some 965 boards include gigabytes have this problem, as soon as the FSB is raised above a certain level the link width for the 16x slot goes to 1x after a WARM boot, the solution apparently is to raise the North Bridge voltage a bit, in my case I just set it to the first available voltage, 1.25v I think....it WORKS!