From specs i could find, 75hz is in OC mode.
Check your monitor manual, and/or HP support/forum on now to set it up.
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..