Damn, going from 600fps to 300 is a huge drop. That’s like 300 frames. I’m glad you’ve sorted the problem out.
I have a much slower PC myself (RX 5700XT + Ryzen 5 3600 + 16GB RAM) and even I only drop around 60 - 80 frames max (From 240 to 180 - 160). I cap mine at 240FPS became I’m using a 240Hz monitor. But you were dropping 300 frames? That’s pretty nuts.
Meh, at least you have Nvidia Reflex. I regret buying AMD GPU because of how much worse the features are in comparison. We still don’t have access to Anti-lag 2 either, and I doubt we’ll get one anytime soon due to how much smaller the market share is.