Replacing Everest in our labs is AIDA64. This new testing suite is from the core development team from Lavalys and continues that tradition. The guys have thrown in better support for multithreaded CPUs as well as full 64 bit support. We use this to test memory and HDDs for now, but may find ourselves opening this up to other areas of the motherboard.
At stock the performance is strong and lines up with the other 990 based boards we've looked at. Overclocked you can see we get a nice boost in CPU performance and it really helps separate the results a bit.