Can anyone tell me what rpm's the OEM hsf on a PIII600EB FC-PGA cpu should normally be. I replaced the HSF on my Asus V6600 video card with the Intel HSF mentioned above a couple months ago. Using Asus' Smart Doctor to monitor my video card and HSF rpm, now reports it's fan rpm at 7100 rpm. It has always reported it to be somewhere around 4500 rpm with the Intel HSF. Does anyone have any idea why Smart Doctor would be reporting HSF rpm as being higher than it has been reporting for the past 2 months. ??? Dan, I wasn't sure where would be the most appropriate area to post this in. So I apologize if I place it in the wrong area.