Can't get 165hz through DisplayPort

recently got a new monitor and I wasn't able to get 165hz to work on hackintosh even though everything else works like a charm

https://preview.redd.it/260ey3s9kcgc1.png?width=488&format=png&auto=webp&s=d0f9af0173c14b0d9ee0ea0f883a7147cc15fea2