Pc needs balance. It's pointless to have a massively powerful cpu and get off the charts fps, if the gpu can't put them on screen. It's just as pointless (especially at 1080p) to have a massively powerful gpu if a weak cpu can't feed it any fps.
Needs balance.
The ASR mobo doesn't have the best VRM's. It's a budget board, not the higher grade Taichi. A lower TDP cpu will work out better overall. That means a 5600x. The 5900x would be nice, but that's a lot of stress on an underwhelming mobo, especially with gaming demands. A lot of thought will need to go into VRM cooling, voltage use etc. It's honestly overkill for the needs, and not that much stronger in fps, the 5600x gets you 90% ish of the way there.
Ray Tracing is a game changer. Doesn't work out so well for 1080p most times, but does put a huge amount of stress on the gpu. GTX models aren't capable of Ray Tracing, they don't have the cores for it. It takes RTX. RT1 was a power hog, on the 2000 series cards. RT2 found in the 3000 series is much more mature, more efficient and more effective.
In RT, a bigger card does better. More RT cores, more power phases, more vram, more everything to support the RT use.
That generally creates imbalance. Same as using a 4k monitor does, requires bigger gpus than would be normal.
5600x / 3060/ti is a well balanced setup capable of almost anything. 5600x/3080 is better optioned for 4k or heavy RT use. 5900x / 3060/ti is better off for content creation use with its high compile/extraction demands etc.
But those also require supporting equipment. Budget mobo's don't do so well with the 5900x/5950x when it's pushed hard for extended periods. 5900x requires better cooling, which doesn't always fit in the case. 3080's are long enough to be too long with some cases and front mounted cooling, hdd cages etc.
Unless the 2700x already is using massive air or 280mm AIO, a 5900x is going to need an upgrade. The 5600x can use the same cooler as the 2700x and run better temps, lower TDP.
Have to look at every aspect, can't just willy-nilly upgrade 1 part and expect good results. In F1 2020, a 2700x at 1080p ultra should be hitting roughly 160fps. A 5600x will hit 250fps. As will a 5900x. The game hits limits and core scaling doesn't help.