Dell optiplex 960's (and other optiplex models) are normally supposed to run quiet with the fans at low speed, though this can be bypassed in the bios with the fan control setting, which runs them one thermal sensor is on the front of the case and measures intake air temperate for the cpu cooler.
35+ Dell Optiplex Cpu Fan Control PNG. Dell optiplex 960's (and other optiplex models) are normally supposed to run quiet with the fans at low speed, though this can be bypassed in the bios with the fan control setting, which runs them one thermal sensor is on the front of the case and measures intake air temperate for the cpu cooler. By any chance did you replace the cpu fan with one exactly like it?
Speedfan Cannot Find My Fan Super User from i.stack.imgur.com
The only issue is that the system fans run high speed all the time, regardless if the cpu is being taxed or not. Testing pwm control hwmon1/device/pwm1 … hwmon1/device/fan1_input … speed was 3292 now 1051 it appears that fan hwmon1/device/fan1_input is controlled by pwm у меня вентилятор работает в автоматическом режиме по умолчанию (dell inspiron 1525 и ubuntu 14.04). I installed ubuntu server 16.04.3 on an old dell optiplex from 2011 with an intel core 2 duo e7500 @2.93ghz, 2 cores.
Under cpu load, the fan speed increases with a long delay.
Control the fan in your dell laptop using i8kfangui, a free utility. The fan makes an incredibly loud and fast whirring noise and the pc shuts down. Dell is very proprietary, fans included. The optiplex is brand new, unboxed it myself yesterday.
