Hello,



Just wondering if anyone out there can help me with this problem I've been having since I installed a pair of VisionTek 4870's in Crossfire on my Rampage Formula X48 Motherboard. I have a 750W power supply, so I don't think that's the issue.

Everything was working great with my old Nvidia Geforce 8800 GTS, but I wasn't getting the framerates on my 1920x1200 monitor.

The problem seems to happen when I'm playing games (like Warhammer Online, Mass Effect, or even older ones like Dawn of War 40K) it crashes my system.

I've checked my NB temperatures and they're around 58-60 Celcius (seems a bit hot).

Does anyone know what I might be able to try to fix this instability? I read somewhere that I could increase the PCI-E voltage, but I'm not sure.

Thanks for any help that you can provide.

Thanks for the suggestion.

I'm going to buy a 40mm fan and try strapping it to the northbridge with a plastic tie (it's going to be ugly cause the heatsink on the x48 is so large).

The alternative I've read about is to actually remove the whole heatpipe from the MB and put on decent thermal paste.

Here are some threads about it:
Asus Rampage Formula (X48) Thread - Page 11 - Overclock.net - Overclocking.net

I'll let you know how it goes. I think the temp on the nb is high because of the Crossfire traffic.

Jonathan

Do not up the voltage or increase the PCI-E bus with an ATI card(s) installed. You can get away with that running an nVidia card, but ATI's don't react well at all to this.

If you have an nVidia card you can get away with increasing the Hz on the PCI-e bus or the AGP bus. There are some benefits to this, but as far as tricks to improve performance go, it's relatively low on the list. 100-110MHz is as high as I'd go on the PCI-e and 68-69Hz is as high as I'd go on the AGP.. but again, only if you have an nVidia card.

ATI's like it best when they're run as spec'd; they get tempermental if not 66Hz on the AGP bus or 100MHz on the PCI-e bus.