I bought a 4870 ZHFC 1g model flashed it with the wonderful tutorial and rom below. This is a mac 1,1 2.8ghz with 11g ram. http://web.me.com/jacobcroft/4870Flash/4870Flash.html Everything flashed fine, rebooted and screen is gorgeous, afterfx and 3d apps are running great, BUT the fan NEVER spins up. and it gets really hot In bootcamp Catalyst I can go manual and have the fan run, but the temp is hitting 80c and the fan isn't running on its own. I've tried making my own ROM with RBE setting the lookup table significantly lower. but still no results. I've been toying with this for a few days and have read numerous threads but have yet to find the answer. any help is greatly appreciated. Thank you.