If you have a ‘good’ power supply, then I wouldn’t worry about replacing it if it works well. My ‘290W’ 3070Ti was turned down to 235-245W and runs happily off a 5 year old 600W EVGA power supply (even at 300W full power), and a 145W Ryzen 5800X. Your CPU might be a part of the limiting factor for speed if you do upgrade, unless you have an overclocked 9900K which should be close enough to the current series. For gaming, sure, it’ll be a decent improvement I think (like 20-30% faster, and in raytracing a bit more)
So basically, until this software gets faster, this is the best you’ll get with the current software or with Beta v3 is lower power usage with your current graphics card, and maybe a slight speedup if it is power limited, but otherwise getting a new graphics card won’t help much in my opinion. Disappointing, yes, but only super fast (3090) or two graphics cards (won’t be much good for you, as your board won’t have dual PCIE 4 x8 mode) will get you the benefits you’re expecting
