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Author Topic: [SOLVED] 7 GPU max on GA-990FXA-UD3 motherboard?  (Read 5601 times)
CrazyGuy
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April 20, 2012, 12:35:54 AM
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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?

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Cablez
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April 20, 2012, 01:21:49 AM
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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.  Smiley

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April 20, 2012, 01:37:21 AM
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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.

If you think my comments have benefitted you it would be nice to hear thanks Smiley

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CrazyGuy
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April 20, 2012, 02:46:21 AM
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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!

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twoBitBasher
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April 20, 2012, 03:04:51 AM
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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 Grin

If you think my comments have benefitted you it would be nice to hear thanks Smiley

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CrazyGuy
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April 20, 2012, 03:13:54 AM
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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 Grin

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

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