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The biggest thing is I'd say get at least a 750w if not a 1000w PSU. I did some research for when I got my 6950xt and it (at least used to) spike the power consumption to where you can get framerate issues without a 1000w Psu. If you want to forgo that at least get 750w so you're in the better range for PSU efficiency of around 80%.
Based on your other comment I would like to ask if you need a 12 core cpu you could sacrifice a little bit of core count and get a 7800x3d (if they're in stock/a reasonable price) or even keep the core count and get a 7950x3d and you'll get a nice ~20fps bump in most games. You could go with the classic 212 Evo for the CPU cooler to bring down costs a bit to meet your budget.
Overall everything outside of the PSU size looks good, you have the right speed of ram and all that
I think the best you can get used for 1440p at 200$ would be the Intel Arc a770 (or maybe the new b580) or the 5700xt.
The Intel card might give you weird issues here and there but my friend who dailies it hasn't mentioned any issues in quite some time.
The 5700xt (if you get lucky on price the 6700xt) is solid and can even do VR if that's your thing at all. It's somewhat worse performance wise (unless it's the 6700xt) but is also a good choice.
I wouldn't recommend Nvidia cards if you're on a budget as all of their benefits only really come on the high end.
You could also wait 1-3 months for next Gen to drop from Nvidia and AMD, as well as the next Gen high end card from Intel that would probably bring prices down a bit again.