Yeah, that heatsink is verrry tiny - perhaps the latest 650i chips are being manufactured on a smaller process, thus allowing them to run cooler? Or maybe that heatsink is just really really tall...
Anyways, looks like this platform is my next upgrade - SLI on the cheap and Penryn compatibility, without the heat issues that plague the 780i. I'll wait until ASUS and Gigabyte bring out their models though - they'll probably have better features (and coolers

) than this Asrock model.