I had the same problem on my Alienware 17 (2013). The CPU fan turns 5400, and GPU fan stopped working . Delete the SupportAssist from your laptop and the fans will start to work properly
So hear me out. I have a 2014 Alienware 17 R1 laptop. For some reason the last couple days have been a challenge. The CPU fan has been going nuts. I mean it's straight up on every time I open the laptop. When I mean "it's on" I mean it's on hard, but the laptop is cold to the touch.Here is where it gets weird and I need some guidance or thought process. The right side fan (GPU fan) rarely turns on, but recently (2 weeks now) when it does turn on the touchpad just stops working and never recovers. I have to either plug in an external mouse or just lock the screen and log back in. Then the touchpad works fine. The touchpad basically shuts down when the GPU fan (right side) kicks on. It makes no sense to me why the fans have to work so hard when all I'm doing it looking things up on the internet. I don't game anymore with this laptop.
17 R1, fan issue