It's probably all of the UE4 plugins which are active by default, I haven't gone in there yet and switched off all the ones I don't need (which is almost all of them) I can do that to the next version, which should help a great deal with this.
Thanks for the quick response! That'd be really nice. Thinking on it, this is the first time I've loaded up your game on my new pc, likely it was happening before too but I wasn't so sensitive to temp spikes and fans going mad on my old one, haha Either way, thank you :)