I replaced my old 2080ti GPU with a 4090 in my remote server and built a PC so that I can still use the 2080ti locally. I followed this great YouTube video and the process was quite easy.
I bought all parts from Amazon and the total is $583:
I then made a bootable USB from ISO image using Rufus and installed Windows 11. The PC is very quiet and nice-looking :).
PS. The featured image for this post is generated using Stable Diffusion, whose full parameters with model link can be found at Takin.AI.