I have a 1000 (200) Athlon (AXIA), running @ 1460. The temp is 45-46 C, when running at full load. I used ACII and have 2 casefans + the one blowing directly on the cooler. The case is open. I havend crossed the L1 bridges yet, and I have the voltage on default. The good thing about the cooler is it makes the PC more silent too. If you wan't better colling, just get a faster fan.... My fan has 2400 rpm and 28,3 dBa.
I Love my Zalman CNPS3100G Cooler.