1x 7970 and 2x 7950 in 1 rig..

[Beans]

I've been running 2x 7950's in one rig and my 7970 in another rig because I have not been able to get them working together in one pc. I can't get the display on the pc to come up at all with three cards in it. I've had 3x5970's in the rig before and I know all my new cards work. Is there some driver issue on the new cards that prevents it? I had to upgrade to the new ati drivers to run my 7950's. Any advise on this would be great.

[notlist3d]

How many watts is your power supply?   I ran into something that sounds close on a recent build.  When i would put any load to one card it would go black if i went when giving its own power supply not sharing with other cards no black screen, and mining great.   

[Beans]

How many watts is your power supply?   I ran into something that sounds close on a recent build.  When i would put any load to one card it would go black if i went when giving its own power supply not sharing with other cards no black screen, and mining great.   

It's 1500 watt thermaltake. I just realized that the issue is specific to the 7970. Even when it's the only card on the pc it won't boot. It works fine in my other pc though. I uninstalled all the video drivers, but still nothing on the video at all when its installed. Not even the bios show up.

[seannnyx]

As consume power?

[Beans]

As consume power?

Not sure what you mean, the power supply should not break a sweat booting up the pc.