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7950 Crossfire 32 bit bus width

Last response: in Graphics & Displays
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December 28, 2012 5:10:38 AM

Hey guys I have 2 7950s in crossfire and one is running at the normal bus and bandwidth of 384bit and 240GB/s
but the other card is running at 32bit bus width and 20GB/s Bandwitch:

http://gpuz.techpowerup.com/12/12/28/3hf.png The normal one

http://gpuz.techpowerup.com/12/12/28/de4.png The slow one

here are my system specs:
i7 3770K Stock (currently)
Asrock Extreme 4 Z77
2x 7950 Powercolor PCS+
8GB of Cosair Vengeance
OZC Agility 3 120GB

Any Ideas on how to fix up that bus speed?

December 28, 2012 10:38:59 AM

Fixed it by myself, new crossfire bridge, regestry edits, disabled the CCC overdrive Boost, Disabled UPLS, so yer done
December 28, 2012 11:12:11 AM

Gpu set up look like this. 1x gpu=x16; 2x gpu=x16+x16=(x32); 3x gpu=x16+x8+x8=(x32); 4x gpu=x16+x8+x4+x4=(x32). so 2xgpu=4xgpu.
If the slow gpu is in x4 port u only get 25% of the speed.
insert both cards in x16 slot to get full speed .
!