I'm Using a AIW 9800p, with the zalman ZM80C-HP (and arctic silver )and a vantec 80mm stealth fan (SF8025L) ( with the zalman Quiet mode adapter) (in place of the zalman option[al] fan (zm-op1). My case has 2 fan openings in the back 1 right above the 9800pro so I also use the Zalman 80mm fan w/QuietMode adapter and using two ThermalTake Ducting mods bolted on ---1 for intake pointing down, and 1 for directing the airflow onto the Heatsink)
BY the way the cooling is silent...(must use fan with zalman zm80c or the temps hit over 130F (no high pitched whines etc. (quieter that the zalman 7000alcu at 2000 rpms)
After all of this effort I have managed to reduce the max temp.[measured as close to gpu as possible and using the ATI 9800 caves demo v1.1 ] of the GPU to approx. 113 degrees F.(room temp approx 70 F )
or 101F idle.
The stock heatsink produces about 127F under same conditions... or approx 110F idle...
The CPU temp is approx 52C (or 45C idle) when the si-soft burnin wizard is running with the ati demo.
I am also using the OCZ Copper BGA Ramsinks ('flower flattened' to fit under the Zalman VGA Heatpipe cooler)
(before the Bga's were to hot to touch (probably 50-60)... now same temp as the heatsink.