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Title: MSI 990FXA-GD65 & 2xHD5850 + HD7970 problem Post by: Bunny84 on May 24, 2013, 06:57:46 AM Hello,
I've got a following rig: MSI 990FXA-GD65 Sempron 145 2GB DDR3 40GB HDD 2xHD5850 reference (Gigabyte & Sapphire) HD7970 reference (MSI) 3 risers 1/16. Windows 7 x64 Catalyst 13.1 http://i42.tinypic.com/2uomh52.png I can only use these slots because I have my cards fastened to my case and my risers work only if they aren't bent too much. I've got a problem. When I have 2 cards of the same (HD5850) my Windows starts without problems and I can use cgminer, Afterburner etc. When I mix 1 of those HD5850 with HD7970, then it also works. When I have all of them, then after UEFI proceeds to looking for OSes on all mass storages, a black screen appears (with a green indicator on a monitor, so the graphic card passes video to it). My hard drive is fairly loud so I could hear if it would have been loading OS with a black screen. It is just stuck. The same happens when I try to boot from Windows 7 install CD. A prompt 'Press any key to proceed' appears, and when I press any key it gets stuck. But when I start from Linux LiveCD and I type 'lspci' into console, I can see all of those cards detected. Any help will be appreciated. Best regards Title: Re: MSI 990FXA-GD65 & 2xHD5850 + HD7970 problem Post by: bruiser on May 24, 2013, 06:59:53 AM Have you tried swapping around the order of the cards? Maybe have the 7970 as your main GPU and the 5850's as your backup/secondaries (with no CFX enabled)?
Title: Re: MSI 990FXA-GD65 & 2xHD5850 + HD7970 problem Post by: HellDiverUK on May 24, 2013, 08:41:38 AM Yeah, you need to use the HD7xxx card in the primary slot (on my SABERTOOTH 990FX that's the bottom x16 slot for some reason). I run a HD7950 in the bottom slot, HD6970 in the next up, then the HD5870 in the top slot. Works 100% for me.
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