1000W psu, gigabyte X58-UD7 board
I can't seem to run both at the same time, when I plug them both in, I get no video on any of the outputs on either card (not connecting the crossfire patch between the two as they are not cfx compatible with eachother).
I can boot it with the 7970 plugged into the main pci-e slot and the 5970 plugged into the pci-e slot but with the two extra power plugs not plugged in (the fans run at 100% and it is not detected).
I am plugging the 7970 into the first pci-e slot (16x?) and the second into the 3rd slot as configured below:http://i.imgur.com/aYMVo.png
The odd thing is... it boots to windows when doing this - I get the windows chime after a bit of waiting.
I guess I could try remote desktop into it while it's running but with no output.
It's also worth mentioning I have an LSI 9280-8i plugged into the last pci-e slot at the very bottom.
Also, when crunching with the 7970 at 550Mhash/s my computer beeps loudly after a while -- not sure why it would be doing this as with the 5970 (which takes more juice) it wasn't doing it.