I have this MB/CPU combo with 2GB 1333MHz memory running Vista Home Premium. The only changes I made to the default 0602 BIOS (latest from ASUS) is to disable Cool 'n Quiet, enable Unleashing Mode and set Active CPU Cores to 4 Core Operation. CPU-Z shows all 4 cores running at full speed (3416.6Hz). But running the PerformanceTest 7.0 CPU benchmark gives a CPU mark of 3481.2 vs 4452.9 and 4546.7 for 2 other identical MB/CPU combos from the PassMark database. I'm new to multicore CPUs and need some expert help to explain why mine seems to be running 25% slower. As I'm using this for HD video processing, I need all the speed I can get (I'll get to overclocking later!).