Less FPS on games with a better CPU.

[rpalmz46]

I ended up recently acquiring a 10700k upgrading from my 8600k and I am noticing on some games the FPS seems to be worse take RDR2 for example benchmarks online say at 1440p with a 3080 and 10700k I should get between 70-110 from what I've seen what I average get is like 45-80 fps. A lot of games do appear to run better so why would my new CPU be slowing down my performance for RDR2? The only thing I can think of is that the 10700k wants faster ram as I have quite slow RAM, mine is G-Skill Ripjaws 2400mhz. I was considering upgrading to some 3600mhz or 4000mhz ram but wasn't sure if the fps gains were going to be worth it or not or if something else could be the issue. If anyone has any advice on this topic it would be greatly appreciated thanks.