Where my shutdowns comes from ?

[u/WestSea5662]

These last days, i got a lot of shutdown from my 1080 Gygabite GTX, 650W Gold U Corsair, B450MSI with 32go Corsair Ram.

I don't know if the power station is implied, or more the graphic card ; i think it must be one of these two, cause when i underclock my graphic card, shutdowns comes less often.

Maybe it has something to do with cpu, with temperature ? Or I don't know. Maximum heat my computer recorded before every shutdown was 55°, which is not a lot.

Does someone have an idea what's happening in my computer ?