Yeah, I'm already running the zalman. Was hoping this would be better, as it seems a lot larger. Its too bad they didn't make it as a all copper or mostly copper gpu cooler, except for the flat aluminum heatsink. I'd pay a lot more than their $30 asking price for a top of the line cooler.
Zalman seems to have a lot of trouble dissipating the heat. In artifact scanning in atitool, I put my hand on the zalman, and can just feel it heating up very fast. Just seems that their gpu cooler is too small and not designed to cope with something like the 1900.
I had to drop the voltage to 1.40 core to control the heat under load. Think my temps are around 47C idle, 72 load. Clocks are 650/800
BTW I have very good airflow. 3 70mm tray fans blowing straight up at the card (horizontal below card). 2 70mm fans exhausting away from the heatsink (vertical in front of gpu cooler).