CPU - Intel Core I5-750 2.80ghz (OC'ed to 3. Simply put, a PWM fan turns off and on very fast to run at lower speeds. Click BIOS 5 gives you access to Total Fan Control allowing you to enhance cooling or reduce the noise of your system at will.

Also my CPU Fan is a 4-pin and my motherboard has a 4-pin for the CPU Fan so everything is good with the headers. Its always the topmost one when you click on 'BIOS' on the MSI support page for the mainboard. And if the fan is connected directly to the PSU, it will also be running at +12V (full RPM). I did a quick Google search about this setting and people say that 'PWM' is better than 'Auto', so i did what they said, i changed the setting from 'Auto' to 'PWM', my question here is, what does it actually do? I mean what are the advantages of using 'PWM' than 'Auto'? Is it better? Because i'm a bit confused here. BIOS overriding fan control Some newer laptops have BIOS fan control in place which will override the OS level fan control. The SYS fan header is not speed adjustable which means it is already running at +12V (full RPM). I went to BIOS to check for any Fan settings for my CPU, i checked every section except the last one which was 'PC Health Status', i went there and saw the setting 'CPU Smart FAN Mode', this setting was set to 'Auto' i clicked on it to see for any other options and i saw 'Voltage' and 'PWM'. BIOS fan control only works with on-motherboard sensors, so there’s no way to.

Enabling this allows you to set your GPU’s fan curve directly in firmware, bypassing the need to have MSI Afterburner open in the background.

Hello everyone, first of all, English is not my mother tongue so i hope you understand what i say. Unlike more general PC fan controller software, MSI Afterburner also has a toggle for a firmware control mode.

Msi bios fan control