I've finally finished my set up and I couldn't be more thrilled with it. Have tinkered with the build since I first finished it last August, adding/subtracting a few parts here/there in the GPU/Ram/additional fans etc., but it's finally at a point where I'm very happy with it.
First thing's first, this amount of power in this small of a case requires patience to figure out the parts, what works with them, and a bit of comfort in allowing things to get hotter than you're probably used to. Easiest thing you can do to reduce heat is go and find a stable offset, right now I just have a quick and dirty -.025v offset and that's it, and it's helped my system dramatically in terms of heat. In terms of idle my CPU depending on the day(I live in Texas, it gets really hot) hovers around 40-41c which is perfectly fine. In daily normal use I'm around 46-50c. Gaming anywhere from 55-80c but usually in the mid 60's, low 70's is the norm depending in the title.
Aida64 15 min stress - 84c - I know, it's fairly toasty but tbh this is a huge win for me as when I first built the system, the rig wasn't even capable of running the test for a minute before me shutting it down, it was hitting 91-92 within 30 seconds. In real scenarios I never really touch this level of heat outside of 1 or 2 games that put me in the low 80's, The Division 2, Battlefield 1, and Anthem, all of which seem to make both of my systems run much hotter than normal. On average during an hour long game of League of Legends I hit around the 55-56c mark, in Overwatch after an hour or two of play I'm around 71-72c, both perfectly comfortable.
CPU: AMD - Ryzen 7 2700X 3.7GHz 8-Core Processor - Demolishes everything I throw at it, and runs at a reasonable temperature.
Cooler: CRYORIG - C7 Cu - Solid cooling unit. Not overly loud even at full load, installation was easy as well.
Motherboard: Asus - ROG STRIX X470-I GAMING Mini ITX AM4 Motherboard- Good board, not my favorite, been a headache as the board has a known issue that causes your system to hard crash if you have CPU monitoring software installed. The only one(so far) that I've found that hasn't caused this is Ryzen Master.
Ram: Corsair 2x16GB LPX 3000mhz - low profile, solid, no issues whatsoever running at the advertised clock speeds.
Storage: Samsung - 860 Evo 1TB M.2-2280 Solid State Drive - Easy enough, works great, fast, really affordable option for a huge SSD.
GPU: Sapphire Radeon VII - Amazing card, love it, beautiful build quality, probably the nicest build quality of a GPU I've ever seen. Runs everything I throw at it with 0 issues.
Case: Fractal Design - Node 202 HTPC Case - My love, so beautiful, so slim, so sexy. Easy to work with, outside of the back part of the case, that thing is a pain in the *** to get off the first time.
Power Supply - Corsair - SF 600W 80+ Gold Certified Fully-Modular SFX - It's a power supply, it works, it's reliable, that's what I want. The cables are stiff as hell and require some bending though to get working in the Node 202 properly.
Case Fans: 2x Noctua - NF-F12 PWM chromax.black.swap 55.0 CFM 120mm Fan - quiet, amazing quality. Have 2 in the GPU chamber.
Overall I'm very happy with my system and everything that I've added to it/put in it. The saved desk space for me is a huge bonus, as I'm fairly OCD and obsess on clutter. Given the amount of power in this case, there is going to be a bit of give and take. It's not reasonable to assume a case of this power is going to perform thermally to what you're used to in a big open air case. There will be heat, it's about learning how to manage that heat. If I could give anyone advice on building in this case it's be patient, you'll run into crashes, errors and tons of frustration at first but it's worth it in the end.