Background. I've had the urge to build a mini-ITX workstation/gaming rig for myself for quite some time and finally pulled the trigger around Black Friday last year since both GPUs (team green) and CPUs (team blue) got pretty significant updates. Now, I know that this is by no means the most cost-effective build and total overkill for most of my use cases, yet it's nice to have such a beast of a machine for the time to come.
Intended Use. I mainly use this PC for:
40% - browsing, youtube etc.
30% - 4K gaming
20% - CAD & rendering (nothing too serious)
10% - machine learning basics
The goal was to build a very powerful yet silent PC. The size was a secondary factor.
NZXT H200. I like the overall monochrome palette of NZXT cases and I feel like H200 is the perfect compromise between size and cooling capacity. I also like a lot that Noctua NH-D15 just fits inside this case and the Chromax covers look gorgeously with overall aesthetics of NZXT design. The H200/NH-D15 combo is nothing new and has been used by a number of people here, whom I am thankful for inspiration.
Intel Core i9-9900K. I do not know why I bought this. Could easily go with 9700K or even 9600K I guess. Whatever, lol. I think I decided to get 2080 Ti and after that, I thought it would be cool to go hi-end all the way.
Noctua NH-D15. I knew I would be getting i9-9900K, and I knew I wanted it to be silent, so I did not have a lot of options. I generally prefer air cooling to liquid cooling due to low maintenance and silent operation. NH-D15 is pretty much the best you can get. It works great and the CPU stays around 25-27°C idle, and around 65-70°C under load with stock settings at 4.7 GHz.
EVGA RTX 2080 Ti XC Gaming. I recently bought a 4K monitor, so I wanted to buy a card that would get me troublefree 4K experience at least at 60 FPS for a couple of years to come. Again, not a lot of options. I managed to snag this EVGA card at a very good price on Black Friday, yet imagine my disappointment when I received it, plugged it in, installed the first game and got artifacts right out of the box (probably memory failure). It was quite disappointing but EVGA has great customer service, so they RMA'd the card no questions and I got a replacement right away. The replacement card works fine so far.
NZXT Kraken G12 & Corsair H90 AIO. Well, everything above considered, the GPU was easily the loudest part of my system, especially when gaming in 4K. I did not notice any throttling with the stock cooler, yet the card could easily hit 80°C under load and the fans were really loud. I have had space for 140mm AIO on the front so I just went for it. Now it is almost silent, and the card would not hit more than 55°C under any circumstances (including OC). The downside of this is that it is in fact so silent that now there is a noticeable coil whine under 100% load. I even thought about RMA'ing the second card, but I am still hoping it would get better with time. It is not especially loud, but it is there.
Corsair Vengeance RGB 32 Gb (2x16) DDR4-3200. Surprisingly, RAM is the most disappointing component of the build. I bought a set brand new, yet the system boots up with ram clock of 2133 MHz and if I apply XMP profile of 3200 MHz BIOS crushes and I have to jumper reset it to the factory settings. Now I managed to manually overclock it to 3100 MHz and it is stable so far, however, I do not understand what is the problem here.
Misc. Seasonic PRIME Ultra Titanium 850W PSU is rock solid and easily the best I have had, never heard a sound from it so far under any load. I have 2 NF-A15 chromax fans on NH-D15 and one NF-A14 fan on Corsair H90 and they work and look really well. All are controlled via PWM and are almost dead silent up to 1000 RPM.
P.S. This is my first post here, so do not go too hard on me :)