How do i O.C Phenom II X2 550..? My motherboard comes with nVidia 720a chipset... AMD Overdrive application is supported by only motherboards with AMD/ATi chipset.So i can't use it .. I'm using the CPU fan that came with the CPU package.. for efficient O.C(stable, for playing games) do i need to change it.. Also i have a spare Asus X70 CPU fan with me.. which i think is better than the fan with the Phenom II(due to the Copper pipings)... what do you think?