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CrossfireX Black Screen Crash

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omega9380

n00b
Joined
May 20, 2013
Messages
7
Need some help, guys. I'm taking my first foray into CrossfireX and I am running into some problems. My system specs are as follows:

Code: 
GIGABYTE GA-970A-D3 Motherboard
AMD FX-6200 Processor
16GB G.Skill Ripjaws X F3-14900CL9Q-16GBXL Memory
XFX Core Edition PRO850W 850W PSU

My video card is an XFX Radeon HD 6870 (HD-687A-ZHFC). I purchased a second XFX Radeon HD 6870 (HD-687A-ZDFC, double fan model). I am running CCC 13.4 on Windows 7 Pro x64.

Both vid cards are working great, they get around ~3000 3DMarks in Firestorm with the new 3D Mark. If they are installed together (without the CFX bridge) the system boots fine, both cards are detected, and CCC warns about the missing bridge. Ive tried both the ZDFC and the ZHFC as primary cards. After I attach the CFX bridge, again the system boots fine, CCC detects the bridge and asks if I want to enable CFX,

As soon as I enable CFX, the screen goes black, I hear the "device disconnect" sound, I get the cursor in the upper left corner, the screen goes black again, and never comes back. The whole system locks up tight. I've checked the event logs, the crash must happen so fast it doesnt have time to generate an error log.

I am at my wits end here. Ive tried every troubleshooting technique I can think of short of replacing the mobo, and I am actually considering that anyway. Any ideas, guys?
 
Have you tried another crossfire bridge by chance? If not do that, and maybe switch the card slots and see what happens.
 
I've tried 3 different CFX bridges, all sourced from different places - One from Newegg, one from Aamzon, one borrowed off of a friend. It also doesn't matter which one of the two cards is in the primary slot.'
 
Have different driver versions made any difference?

Try some older official driver version, maybe the final version 12 release, from early this year.

Just a suggestion, not sure if this will help.
 
Haven't tried older drivers yet. I did try the 13.5 Beta drivers, but got the same result. I'll give the older drivers a shot when I get home tonite, any recommendation on the best version for top compatibility with CFX?
 
UPDATE: It was the motherboard. I upgraded to a Gigabyte GA-990FXA-UD5, and all is right with the world.
 
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