Welcome to the HP Support Community @NewPCgamer
You have 2 or 3 fans installed Rear System (Exhaust) fan, System (CPU) fan and if installed a Video Card fan.
You can remove the CPU fan and the Exhaust fan to install a Liquid Cooling System."Only one"

On some other models you could install an LC System for the Video Card.
On those models under the top cover you could attach multiple fans!!!
Some videos that may help???
How to Replace the System Fan for OMEN by HP Obelisk:
http://supportvideos.ext.hp.com/detail/videos/parts-replacement-and-upgrades/video/5828223678001/how...
REO