Hi everyone. I'm trying to change the fan speed on my new Sapphire HD2600XT to slow it down a bit - currently it sounds like its working at 100% & it is stupidly loud. I can't watch Blu Rays or HD DVDs with the noise it is making. I've tried both ATi Tool & Riva Tuner in Vista Home Premium x64 but neither work. ATi Tool shows me the fan speed options but doesn't actually do anything when I change them, & Riva Tuner doesn't even give me the option in the drop down menu icons. Is there no way to change fan speed on this card under Vista? I really don't want to have to send a second card back to E-Buyer after the first (a Sapphire HD2400XT) kept overheating. Thanks.