To achieve 4K in 144 frames per second you need the best graphics cards money can buy, and we know finding one right now may prove tricky. As of this writing, you will definitely need an RTX 3080 Ti, RTX 3090, or RTX 3090 Ti on the NVIDIA side to ensure getting close to 4K 144Hz in demanding games.
We don’t mean famously high FPS titles like Rainbow Six Siege, Fortnite, or Counter Strike, but rather stuff such as God of War PC, Dying Light 2, and Forza Horizon 5, as examples. You’ll need at least 12GB of video memory, and if you prefer an AMD graphics card then your best options are RX 6900 XT or RX 6800 XT.
Graphics cards such as the RTX 3070 and RX 6700 may work in some games, but the results will be very inconsistent. Those GPUs were designed for high refresh 1440p or 4K 60Hz, not so much 4K high refresh.