I have an old Northwood compatible Shuttle XPC that I upgraded from a 2.6 GHz Pentium 4 (Northwood) to a 3.4 GHz Pentium 4 (Northwood). Now, I'm wondering if it is cooling it well enough. I've seen it in the low 60's (C) while idling, but CPU World says the maximum operating temperature is 68 degrees. The BIOS's default temperature for increasing the fan speed was 60 degrees, with the fans reaching full speed at 70 degrees. I've lowered the lower threshold to 56 degrees, but that causes the fan to kick in quite a bit more. Is that the maximum ambient temperature and I'm OK or is that the temperature reported by the CPU (in which case I should be concerned?
I'm wondering if perhaps I didn't do a good enough job applying the thermal grease.