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Disable Crossfire on 4870X2

Posted: Mon Nov 10, 2008 9:37 pm
by foog666
I have a 4870X2 and I want to fold on both GPUs. I can't seem to disable crossfire on it. I disabled Catalyst AI and when I try to extend the desktop its tell me crossfire is still enabled and that I need to disable it. Am I missing something??? I even rebooted and I'm still getting the crossfire is still enabled. I have CCC driver 8.10 installed.

Re: Disable Crossfire on 4870X2

Posted: Mon Nov 10, 2008 10:00 pm
by Col-P-Todd
If i,m not misstaking The ATI X2 gpu's do not use crossfire, they work together as one gpu only when you have 2 X2's will crossfire be enabled.

Re: Disable Crossfire on 4870X2

Posted: Tue Nov 11, 2008 4:36 am
by DMB2000uk
Are you running vista or xp?

It's only possible with xp, and I read you need at least version 1.2.1 of the CAL.dll files.

I can't find any definitive guides to disabling crossfire on the x2's, so maybe you don't have to and the -gpu1 -gpu2 (those are wrong, but you get what i mean) flags are all that is needed to get it working?

Dan

Re: Disable Crossfire on 4870X2

Posted: Tue Nov 11, 2008 9:50 am
by foog666
I'm running XP. I've setup my shortcuts on my desktop and edited the Target and Start in in the shortcuts. I can only get one gpu to start. When I start GPU2 it tells me is not supported or I need to update the drivers.

Re: Disable Crossfire on 4870X2

Posted: Tue Nov 11, 2008 9:55 am
by DMB2000uk
You might have to have a second screen plugged into the second DVI output and the desktop enabled on that one too.

Dan

Re: Disable Crossfire on 4870X2

Posted: Tue Nov 11, 2008 10:06 am
by foog666
When I do that , it tell me I need to disable crossfire

Re: Disable Crossfire on 4870X2

Posted: Tue Dec 09, 2008 9:35 am
by foog666
Guys I've managed to get both GPUs to fold now.. I was reading in the folding@home forum, that a few people were getting between 7500 to 8000 ppd with a 4870X2. I'm waiting for my ppd to update to see the results.

Re: Disable Crossfire on 4870X2

Posted: Tue Dec 09, 2008 9:45 am
by DMB2000uk
What did you have to do to get it to work?

Dan

Re: Disable Crossfire on 4870X2

Posted: Tue Dec 09, 2008 9:54 am
by foog666
I added the flag command -forcegpu ati_r700 to the target path. Before I only had -gpu 1. I also updated to the newest core.