Looks like a test pattern to me.
ATI Overdrive looks something like that when its calculating overclocks.
I know the test pattern but it has the "AMD Overdrive" logo on the lower right corner. The error one doesn't.
Did you try to disable Crossfire?
I also tried it with crossfire disabled but the problem persists.
Are you still getting those 90+ deg C temps while you are mining? That is arguably too hot. If I had to guess, your card is not stable at those temps and this is just the result that happens when it crashes.
No, I don't get temps over 80C. After it was 93C, I cleaned the heatsinks and it's about 60-80C while mining.
It looks like you closed the blinds on your window. sorry, i can't help but couldn't resist commenting.
LOL