So it only happens on this web site? Not other sites or browsing in general? To me, that would indicate graphics load on this site is more than other sites you visit. It’s working hard for some reason. OTOH, make sure it’s not something that’s part of your routine. If you always read the news and then switch over to this site, maybe it’s just a coincidence that you’re always search this site at about the same time (running time) every session.
Personally, I can’t stand fan noise so I got a computer with no fan. I’ve been thinking about a Mac but waiting for the bigger one to switch over to the M chip. Fan noise will be a significant consideration in whether or not I switch over to a Mac.