same here had a oc'd 5950x and a 6900xt and 32gb ddr4 ram, game was perfect until the reset on the 2/2/21 after that fps in game tanked in almost all destinations from a silky smooth 100-120fps at 4k down to a measly 42fps on tangled shore, dreaming city, the tower was a bit better but around 70-80 fps, however i am able to play at around 100fps on the cosmodrome, nessus, europa and finally the moon but i do get micro stutter like mad in parts which really puts me off playing the game. i should note when my fps drops started i headded into the bios and reset my cpu oc and agin my gpu was reset via windows what ever you did bungie, please look back and delete what ever is causing this sudden and annoying fps drop. i will say i can eliveate the fps drop to a degree if i go into my gpu settings and under performance change the minimum clock from 500mhz to 2500mhz that does allow the fps to increase around 10fps on the tangled shore, dreaming city, but on the other destinations i mention that are ok for fps the gpu oc lets the frame rate jump upto 144fps with an average around 127fps which is nice