I'm having the weirdest issue, and I'm wondering if anyone else has experienced this --
My motherboard is a DG35EC, and after a recent upgrade to a hotter CPU, I started to notice that things were getting mighty toasty.
I had a look-see at what was going on, and it turned out that my CPU fan (stock Intel cooler) was spinning at 800RPM. individual core temperatures were upwards of 90°C (according to both speedfan and CPUID's HWMonitor) and hotter under load, but the fan wasn't spinning any faster, and speedfan didn't seem to be able to do anything to control it.
Some googling later, I stumbled upon this thread: http://communities.intel.com/thread/28206 -- same board, what looks to be the same problem. I tried what he suggested and got things good and hot and rebooted immediately, and the fan sped up in the BIOS hardware monitor. Booting into windows, I was able to get it spinning up to around 2000RPM, with a noticeable difference in temperature in both the software readouts, and the "finger test" on the heatsink.
After this, I tried again with speedfan, and found that I can indeed regulate the CPU speed, but only from the minimum, to whatever it was spinning at the last boot. (Previously, when I thought speedfan wasn't working, the fan was spinning at minimum at boot, therefore there was no wiggle room)
Case fans don't seem to respond to speedfan at all either, they just sit at 500-600RPM without any change. Neither does the graphics card fan, but that's a whole other kettle of fish.
CPU is either a Q6700 or a QX6700 (Windows reports Q6700, CPUZ reports QX6700 -- Markings on the chip were unreadable, I picked it up secondhand)
Should mention -- there are absolutely no fan control options in the BIOS. Under the fan control menu, there is "enable automatic fan detection" with the choices of "disable" "enable" and "next boot" -- I have tried this in all settings, without any change in behavior. The BIOS otherwise doesn't let you touch anything to do with the fans.
I'm at the end of my wits here, and would really like to know what in the blazes is going on, and get it corrected so I can stop cooking my components!