Ok, so Dell updated the Bios recently for my Dell Inspiron 7570 and once again the Fan is on when the power is plugged in.
So after some more tinkering with power options and BIOS, I found in the BIOS that there is an option called Intel – TurboBoost and this basically allows the CPU and GPU to work above normal performance levels.
Since disabling Intel – TurboBoost in the BIOS, fan has remained quiet but as a result I have noticed the laptop is not as responsive as it used to be.
To Disable Intel TurboBoost for the Dell Inspiron 7570 laptop, follow the below steps:
- Power On laptop and when Dell image appears, click the F2 button
- Once the BIOS screen menu appears, scroll down to Performance Category and expand
- Then in that sub category is Intel TurboBoost
- Expand Intel TurboBoost Category and on the Right Screen panel is the option to Enable Intel TurboBoost, which is ticked / enabled by default
- Untick this check box and save settings
- Exit BIOS
It is strange why this is an issue with Dell’s and I have used HP’s – Sony (old school) and MaC books etc. even the kids Lenovo’s are quiet when plugged in, i7’s must run really hotย 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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