[SOLVED] 7 GPU max on GA-990FXA-UD3 motherboard?

[CrazyGuy]

I can't get the system to post with more than 7 GPUs. Is there a 7 GPU limit on this MB? 3x5970 and a 5830 works just fine. 4 5970 and it won't even post. Anybody running with 8 + GPUs on this Motherboard?

[Cablez]

I believe I tried 8 gpus with this board and it gave me nothing but grief.  Right now I have it running rock solid with 3x5970s though. 

[twoBitBasher]

Try turning everything off from the bios... usb you probably need, so not that but the rest: Firewire, Sata, Sound, Marvell 88SE9172, extra usb  Etron EJ168 chips, etc. Then see if that helps. If not try with just one stick of ram. My theory is that the BIOS can't allocate enough memory to map all the stuff that can be addressed. The Fastra2 project had 13 GPUs and they needed a custom bios to be able to boot.

[CrazyGuy]

Try turning everything off from the bios... usb you probably need, so not that but the rest: Firewire, Sata, Sound, Marvell 88SE9172, extra usb  Etron EJ168 chips, etc. Then see if that helps. If not try with just one stick of ram. My theory is that the BIOS can't allocate enough memory to map all the stuff that can be addressed. The Fastra2 project had 13 GPUs and they needed a custom bios to be able to boot.

Good idea, that worked!

[twoBitBasher]

Just out of curiosity could you list what needed to go to get it booting? could you keep sata and sound and still boot? For BAMT or LinuxCoin you really just need the chipset usb and networking, but if you want Windows then the chipset sata and sound would be nice too 

[CrazyGuy]

Just out of curiosity could you list what needed to go to get it booting? could you keep sata and sound and still boot? For BAMT or LinuxCoin you really just need the chipset usb and networking, but if you want Windows then the chipset sata and sound would be nice too 

Linuxcoin from usb stick. I disabled everything but usb and NIC, didn't try any other configs.