Under normal circumstances the cpu fan should be running at 1000-1200 rpm and the normal settings (proposed) should be
Under speed-threshold 250
Minimum duty- cycle 20
max duty-cycle 100
The processor temperature should be fine under those numbers, if you are see some higher temperatures, you can move the minimum duty-cycle to 100 and it can give you 2300-2400 RPM. Rendering and video converting are heavy application and is normal to see high temps, is good to keep an eye on that.
Please go into BIOS setup and respond with the settings for the CPU Temperature and the CPU Fan.