I upgraded from 10700k(@ 5.2ghz all) to 14900k(@5.8ghz all, 5.9ghz quad and 6.1ghz dual) and I have 4090 and game in 4k. I saw a like 10-20% increase in 99% fps and like a 5-15% in average fps. Depends alot on the game, the pc overall feels much smoother, and I can alt tab much quicker. Multitasking is not an issue anymore(discord streaming doesn’t change fps). Tarkov got a huge boost like 40% fps increase. I also got ddr5 ram (6400mhz 64gb) from ddr4(3466mhz 32gb).