which cpu gives most fps rn

Obviously its your money and your decision, but I would get a 9600X if I were you

if you have a 5070 and just want to game, I dont think the extra cores/threads of a Ryzen 7 or higher CPU is really worth it, because a 7800X3D or 9800X3D will be bottlenecked by your GPU.

So unless you plan on buying a $1200+ 5080 or a $2000+ 5090 (bear in mind the AI market means we are going to have shortages in 2026 so itll be even more expensive) you basically are paying a tonne of extra money just to have the 7800X3D or 9800X3Ds extra performance wasted by your GPU.

6 core CPUs are definitely more than enough for 1440p gaming (5070 cant do higher than that) and I can run any game on 1440p high or ultra and get good frames, and for competitive titles I get about 600 FPS on Val, 300 on CS and OW, and would get similar in all other comp titles (With a 16GB 9060 XT, so around a 5060Ti level of performance)

Again, its your money, but I think its worth to save yourself the money and either spend it on the rest of the PC (RAM in particular is probably worth buying now before it goes up in price again, so if you dont have 32GB and want it, now is probably the time to get it because the prices arent going back down in 2026) or you can just save yourself the money. Just my opinion tho, do whatever your heart desires. If you want the 7800X3D or 9800X3D for performance or future proofing or just to feel like a baller then fair enough, it still will be better than a 9600X but you wont see the full potential of it because of your GPU

Also dont take my word as gospel, make sure you research elsewhere before you come to a conclusion on what u want to buy. Wish you the best with whatever u choose