What is the max speed you got outta 450MHZ AMD II? I am planning to upgrade my AMD II 400 to 450. My current AMD II 400 oc to 450 rock solid but I want to hit 500MHZ with 450MHZ. ANYONE DONE THIS YET? Heard that no one has reached 500MHZ with AMD yet. I just got an alpha cooler. Let me know!