SiSoft doesn't show to much variation when it comes to memory performance. It will be one of the first benchmarks to go when we revamp our testbeds in the coming month.
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.
AIDA64 of course separates everything a bit more. At stock there's little between the setups. Where we begin to see a difference is when we start to overclock; you can see nice improvements on the ASUS board as we head more and more north on the clock speed.