What is the safe operating temperature range of the Radeon 9800 Pro. I ask because I removed the OEM fan and heatsink and installed a passive Zalman heatpipe ZM80A-HP(www.zalman.co.uk) and am wondering if the temps I'm getting are appropriate. Currently the base of the heatsink is running at between 60 and 65 degrees, much hotter than the CPU (AMD XP 2500+). Mind you, this is running at near idle. Is this fine? What temperature should I strive for? Thanks.