This cpu never had a problem with being idle stable. The BE I have is the only one to ever show problems with that, but it was because it had started to deteriorate. Max boot so far was 268x11.5, not at all stable though. Right now I'm doing everest stability at 262x11.5 with 1.34v cpu and 1.35v nb. I need a 790fx board or 780a board with the tweakability of my crosshair, I miss the memory bandwidth.

Edit: And the 9600 was previously bench stable at 266x11.5 for wprime32m and superpi1m, 264 was where I did other benches I think.