Yeah, mine looks kinda like this overall (13-15% load):
View attachment 2584496
The fans are spinning pretty hard, and my 4080 is 25% loaded, which is kinda a lot for a simple engine like Renpy. Playing these videos from a video player is much easier for the system - 5% CPU, 8% GPU; compared to 1% CPU 0% GPU for an idle system.
I'll try to find on older Renpy version and see how that goes.
I also have
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thing bookmarked as a possible problem solver. At the bottom there, see if the game is running on a discrete video card instead of an integrated one. (not sure if your i3 even has an integrated one)