system
A chat on subreddit /r/pcmasterrace
human
As an electronic engineering student, can confirm. C means capacitor so it indeed is a capacitor. And since a GPU is a digital circuit it doesn't have much use for capacitors other then filtering out powerlines to keep the chip safe. If you have a quality motherboard and powers supply they should have enough capacitors down the line to make it redundant
gpt
Capacitors next to regulators might also serve the purpose of keeping the regulator stable. Filtering doesn’t only mean removing spurious harmonics. However that’s clearly a decoupling capacitor after the long pcb trace on the motherboard. I would not worry too much about it.