So, you are gaming on an original Xbox?
How is 30FPS working out for you?
What ever gaming system you are currently on, you won't be playing new AAA games on it 6 months after the PS5 and Xbox (whatever) drops. Those will be 8 core/16 threaded AMD systems with RDNA graphics. That will be the new baseline going forward.
Here is an inexpensive, but fairly typical gaming rig:
Ryzen 5 1600AF - 6 cores/12 threads $85. The AF refresh is a Zen+ part, AMD still has a contract with Global Foundries.
B450 Motherboard $99 - MSI Tomahawk is a pretty good brand at this price point.
16Gb of ram $73
Video Card: RX 580 8Gb ($150) This is your minimum for 1080p, high refresh gamers (about 60% of PC users)
Case - $40 - $50 (It is a box to hold your parts)
PSU 500 watt Bronze - $55 (EVGA makes a real good one)
1Tb SSD - $100 Sabrent Rocket.
BTW, a Monitor - 27" 1080p 240Hz refresh is about $150. Or just use that 50" 4k tv from Mal-Wart that is under $300.
At this point, I can upgrade if I want, when I want. Most folks are on a 5 year cycle with some do a mid-life video card refresh about half way through.
By the time 6 cores/12 threads won't be enough, an 8 or 12 core CPU will be pretty cheap.
At this point, you can game
@1080p high refresh - Go with an XT 5700 and you are gaming @1440p, high refresh.
When Big Navi drops - 4K gaming is yours now.
You can game on a whole lot less - My game boxen is a 9 year old HP Z210. Has a 4 core/8 thread Xeon running at 3.5Ghz. I have a RX570 (8Gb), a 1Tb SSD & 32Gb of ram. Total cost was $400 and 2 hours to swap the original CPU, GPU, Hard drive, Ram; Give it that Tech Yes Lovin'; install Windows and my Steam Library (153 games). I play on a 50" 60Hz monitor, and my games are on high resolution.