That card is easy to overclock. I had the 1gb version which I did up to 5% of it's maximum; at total max overclock textures went a bit funny; and there wasn't that much to be had from it; the cooling side of it hmm well I stuck a few copper shims on the ram since there was no clearance for any heat sinks; and replaced the Thermal interface Material with mx-2. you can probably rev it up without any fear. I only added 1% power.