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.