Opinions on CPU HSF for AM3 system

- I still use the original Thermalright Ultra 120 with two Scythe S-Flex 1600rpm fans, and IC Diamond 7 Carat thermal compound. Results are outstanding.

- The last time I used a stock cpu heatsink fan was many years ago so I can't comment on temp improvements. I doubt that any of the regulars and veterans here have used a stock cpu heatsink in a long time.

-I bought my cpu heatsink from The Heatsink Factory:

http://www.heatsinkfactory.com/

-Yes, flatness is preferred. I lapped my heatsink and my cpu. It is not a mandatory requirement. I just wanted to see if an old fart like me could do it. There is an exception to the preference for flatness. Sometimes the heatsink and cpu are slightly curved in such a manner that they mate perfectly.

Now, about those temps - One should also have a case with excellent ventilation, airflow, cooling, and cable management. Your Antec Twelve Hundred is just such a case. Here's a link to a full tower case comparison that includes thermal testing:

http://www.tomshardware.com/review [...] 05-10.html