Well, I've just installed the new ACF64Pro on the AMD X2 (Thank you again Buck!) and it's working great. Temperatures are practically identical to the Gaia (even though the Gaia was push/pull). I think it probably helps that there's a tad less thermal paste.
I've been getting a ton of the 2387pt WUs today, and I must say I'm happy enough with them. PPD is a bit lower than before (~15k per GTX460 vs 16.3k, 16.9k vs 20.3k on the GTX470), but they run a lot cooler than before.
Something is definitely up with Windows or FAH on the AMD X2, when I shut down the computer to install the new HSF it lost all progress on the GPU WU again
