For the most part are gaming laptops going to be loud?

This in comparison to average consumer laptops.

My normal laptop is quiet for the most part unless I am doing some heavy processes like watching something in HD.

Will a gaming laptop have it’s fans on all the time? Or since it’s actually better equipped less often?

Does the size of them lead to better fans in terms of cooling and/or being quiet?

I’ve been looking at the Alienware MX and that Asus gaming laptop.