the 3500+ has an odd multiplier , so it will run ur ram at stock at 720 mhz instead of 800 mhz. Not much of a problem for A64 still since the IMC is really efficient but something that you might want to keep an eye on. However the AM2 clock like a beast and 2.9 or 3.0 ghz seem to be a breeze for them. What cooler are you using with it ?? The Arctic Cooling 64 Freezer Pro works great and is real cheap and good cooler.