I got up to 98.2% CPU usage using 3xOrthos running small fft's, 1 super-pi 1.5 running 8M figures, 1x Prime95 running small fft's.
The thing that is weird is temps are 68*C, 66*C, 61*C, 60*C and cores 0 and 1 seem to be straight 100% while cores 2 and 3 seem to jump a little every millisecond(from 90-99%?). Is this normal?
I doubt I will ever actually use all 4 cores and get 100% out of them if it takes this much just to get to 98.2%...