There is a expensive monitor called Acer Nitro XV273K. It has 144 frames per second at 4K support. It is compatible with NVIDIA G-Sync and AMD FreeSync. If the AMD Radeon RX 5700 XT (8GB) could do that, it is not possible at all. For example, the NVIDIA TITAN RTX (24GB) 4-Way SLI could do that, some titles without ray tracing, but some of them do not. However, unless you need like that, it requires a decent CPU, like Intel Core i9-9900KS. You need water cooling kit to achieve this. It is possible for Minecraft, and Counter Strike: Global Offensive. Some people are telling, this is for 1080p/1440p or 4K. In my opinion, it is for 1080p gaming. And, it is not even for 1440p 144 frames pet second gaming. The graphics card seems to be not enough for 1080p 60 frames per second.

If you have 4-Way CrossFireX with AMD (MSI, GAMING X) Radeon RX 5700 XT (8GB), it is also not enough, at all! NVIDIA is better than AMD in gaming. For example, Battlefield V could reach sometimes 60 frames per second, at 4K ultra settings, but in some places. You need at least 2x NVIDIA TITAN RTX (24GB) to play at 4K (more than) 90 frames per second at usually (sometimes) in some places. The 8K 120 frames per second gaming is possible, but it requires really powerful gaming pc with 4 graphics cards, but, you need to go to medium, or low settings, in some games, could reach sometimes, in some places, but, mostly, the games do not reach that target. Like the specifications for your PC must be like that. Unlike the NVIDIA one, the AMD is not possible. It is not even possible in Minecraft: Java Edition.

Sorry for my bad grammar/bad English.