I recently upgraded from an E6700 to a Q6700 in my system, built with a DG35EC board. Since the upgrade, I'd noticed temperatures getting a wee bit toasty, the cores of the CPU reporting upwards of 100°C (in CPUID's HWMonitor) when doing anything CPU-intensive.
Cooking the processor is highly undesirable, and normally I would have chalked it up to insufficient cooling, or a poor connection with the heatsink/fan, or even dirty stinking liars of temperature sensors, but when I went to check the heatsink temperature with my forefinger (this particular finger test caused a torrent of creative epithets describing just how blasted hot it was) I found the fan to be spinning very slowly. A few seconds of headscratching and an install of speedfan later I found the CPU fan to be reporting a speed of just ~850RPM. Attempts to increase this speed using speedfan's controls were unsuccessful.
Some googling later, and I came across this thread: DG35EC + Q9550 Problem with CPU Fan and Temperature describing a similar problem with the same board. Following some of what was listed there, I fired up Prime95 to heat the CPU up to around 95°C briefly, and immediately rebooted and entered the hardware monitoring section of the BIOS. There I found that the fan speed had increased to 2500RPM. I booted into Windows, and fired up speedfan again, and found I was able to control the speed between ~850 and ~2500RPM, where ~850RPM was the "0%" value, and 2500RPM was the "100%" value.
Through this testing ,I have established that the fan speed will not increase beyond the maximum speed from the last time the system booted.
I seem to recall as well, that previously, this system on boot would run its fans up to maximum for a brief moment after power on, and then settle back to appropriate values for the temperature, but I could be wrong on that one. I never really paid too much attention to it prior to noticing this problem.
Any ideas on why I'd be experiencing these issues? I'm not sure if they started as a result of installing the Q6700, or if they'd been going on with my E6700 as well. The E6700's lesser heat output may have led it to be just peachy even though the fans didn't crank up.
My BIOS is the latest revision for this board offered by Intel, and when I attempted to reinstall chipset drivers to see if this was a peculiar driver issue, I was informed that a newer version was installed than the latest version available (as of yesterday) on Intel's download page. I told it to go ahead and install, and it went ahead, but completed almost instantaneously leading me to believe that it didn't do a whole lot, and didn't prompt for a reboot. I rebooted anyway to be on the safe side, but same issue persists.
Anyway, Thanks in advance!