system
A chat on subreddit /r/pcmasterrace
human
AMDs and Intel use a chiplet design. The components are spread out. Edited to correct. According to Intel it is starting to use tiles on its 14th gen.
gpt
They are in the center still. Anyways, op didn't use enough compound to have it spread to the corners, you can use more compound and it doesn't affect thermals and you'd have the corners filled