I got a really weird problem
I did 2 dummy plugs for the 7970's I put in my 280X rig. Booted up and CCC detects all 3 displays. But...I ran GUIMiner, that I've been using for the 280X all along, and there's no load on the cards :/. I made 3 instances of CGminer, selected GPUs 0, 1, and 2 respectively, for each. But when I run them, they show a weird ~100 M/hashes, even though they should be showing around 700 K/hash (that's MEGAhashes, not KILOs). Also, Afterburner shows no load on the cards and the temps not increasing, but it sounds like the fans might be increasing in RPMs a little.
I don't know, pretty weird. I'm going to get the drivers reinstalled today, just in case that's the reason this is all happening. But yeah is there a reason the cards are showing Mhashes instead of Khashes? And not showing a load on them while doing so? Just ran GPU-Z render test and the first card showed a full load, full 3D clocks. Mining shows no usage on any card though.