Pro Pioneer fan failed (?)

Sandshark wrote:
I have always found the CPU temperature to be rather low and have wondered if the two temperatures are reported backwards. My CPU temp is always reported lower than the case temp, which seems odd.

Odd but true. The CPU, with its big heatsink and powerful fan, runs at close to ambient temperature whenever it's not heavily loaded. The heat from the CPU has to go somewhere, though, so it's transferred into the case. The drives get warm, too -- typically 10-20 degrees C above ambient -- and they also radiate heat into the case. The case fan draws cool air in and through the case, but there's a lot of mass in there to cool down, so the SYS (case) temperature typically equalizes to around 10-20 degrees above the drive temperatures.

You can see for yourself that the CPU and SYS temperatures are reported correctly by putting a heavy load on the CPU and watching the temperatures. CPU will rapidly spike; SYS, if it increases at all, will do so much more slowly.

Sandshark wrote:
When my drives are spun down, I have had the CPU temperature reported at or even a little below ambient room temperature. I highly doubt that to be the case. I can easier believe that of the case temperature, the slightly below just being lack of calibration.

Yes. The CPU's temperature sensors are not extremely accurate.