I'm quite new to Ubuntu, but, sometimes, when I'm on youtube, or doing something else, GPU overheats, and cooler gets very loud, until I close everything I'm doing, than after few seconds GPU gets cooler...
I've be searching on forums for this problem, but I didn't find soultion...
I'm using Dell Inspiron 15 3521:
GPU: Intel HD 4000 (I hope) and ATI Radeon HD 8730M
CPU: Intel Core i3 3227U 1.9GHz
I'm not sure what's overheating, but I think it's the GPU