I started playing Red dead redemption 2 using MSI afterburner (for the overlay) and noticed the gpu clock speeds were clocking at around 1500 mhz even though it was rated for 1663, I went in radeon wattman and went to manual and it sure said 1663 mhz at max state but it still wasn't hitting that, I can assure you there is no bottleneck as the gpu is hitting 99%, I'll leave my full specs below.
MSI VEGA 64 8G OC AIR BOOST
RYZEN 5 5600x
G.SKILL RIPJAW 16gb 3600 MHZ
B450m DS3h
Corsair 750w PSU
My gpu temps are around 70 and sometimes below.
EDIT: I was messing around in Wattman and i set power limit to +50 and that seemed to fix it.