my system runs anywhere fom 32 to 36 when idle and i had noticed it creeping up a bit. my heatsink fan (stock intel) is only spinning around 1000 rpm and the core temp is now around 48-49. i think the heatsink fan is dying, since both pc probe and my bios agree on the fan speed. So, a few questions. What is a good heatsink/fan for a socket 478 2.8 gz northwood chip? the mb model is below? I don't have any crazy stuff in the case so space isn't an issue. How do I know it's really the fan going kaput and not a controller on the motherboard?