Not sure about 'at a login', but some games menus have crazy gpu use with unlocked fps cap and/or vsync off.
Check on game forum to see what other users experience.
My PC- Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T.