AMD Phenom II x4 820
Pros: Low temps, P95 stable @ stock
Cons: Max overclock 3.6GHz on air
I have been using this CPU for over 2 years now and it has been very reliable. I tried replacing it with a PII x4 955 with C2 stepping, but these was no performance gain and temps rose significantly. Both CPUs had a max overclock of 3.6GHz on air.










