rx7800xt

hi, my setup i5 13600kf rx 7800xt 2x8 gb ddr4 3200 corsair vengeance cl16 asus tuf gaming B660M-plus matx seasonic gold 650w pny 1tb m2 ssd so here is my problem my fps drops from like 360 to 240 while my core clock is set on afterburner to 2650mhz and its being used at around 1500-2100mhz and...