Dkunky

selling both for $90 each (after you test that they both work and have no issues) you can get something like a 980 TI, assuming you've got  decent power supply.

for fun it might be neat, but don't expect great performance.

I got a quite a few.
1) Vega wasn't bad and will age very well as DX12 and vulkan become more adopted.
2)Nvidia will be struggling with RDNA for the foreseeable future. Turing will be struggling against RDNA on the gaming side while Arcturus (MegaVega) will be crushing it on the compute/datacenter. 
3)Many people don't need ATX, MATX will be more than enough for cpu,gpu,cooler so on. Unless you need 3 or more add in cards MATX will be a better more affordable for budget people. And shifting to that standard will have more manufacturers bring higher end boards to that standard. 
4) 120hz will be the next standard. 60 is going the way of 30Hz. (I was still adamant about 60Hz but got to try 120Hz and now I get it.)
5) Intel on desktop will essentially be bulldozer especially when Zen 3 launches. But intel on laptop will be hands down the only options especially with foveros and the Intel version of "Little Big" with Willow Cove Cores with a larger highly binned Rocket Lake Cores.
Feel free to rebuttal I am always willing to hear some fresh perspectives.  

TL;DR: No limit so long as its elective connection to any network public or private.
NeuraLink (the 5G network variants). DONT DO IT. 
Asides from that I would have to say an always online type of anything (bar cellular).
Think about what your machine is capable of on its own. As enthusiasts I think we forget about what our machines can do that's not reliant on the internet and focus more on what they can't do. Don't get too caught up in the rat race for the bleeding edge. I know we see our tech as an extension of ourselves but to others they become the extension of it.
Forgive my ranting guys I don't get to talk too much about this.

Zen 2 doesn't overclock well but if you want to tweak the power use to get to stable lower Temps and turn on PBO and hit those boost clocks all day long. But you could save the $50 and go non XT and get the power play tables and get it to 1900MHz with a decent aftermarket card since you're looking into overclocking anyway. Depending on the game you might be close to an overclocked Vega64 or 1080ti(stock).

If the latency is worse then they'll just go back to Ryzen 1000 performance which sucked in my opinion, I doubt it will be worse considering everything is smaller so the distances are shorter too, at worst it will be comparable to Ryzen 2000 i think and that's still good enough to embarrass Intel.

Intel is in a really tough spot, AMD's market share is increasing rapidly

AMD will have the lead for at least 1 year.
When Intel finally solved the 10nm problem, they will have an answer.
It's easy for intel to release more cores to defend it's position, but it is not easy to match AMD pricing.
And Intel will move to 3D stacking that will be the answer to AMD's chiplets.

I always download Cinebench and test them. Gives a good idea on noise and how binned the chips are for those units. That and I'm an impatient bastard and will shuffle out the money for that on site transaction. 

I'd probably look into a larger liquid cooler or an air cooler. 120mm liquid coolers aren't the greatest.