I just built a new PC and spent around $5,600 USD. Does not include my monitor which is an Ultra Wide 4k LG which was around $1,200. Here are my specs:
AMD Ryzen 7950X3d
ASUS ROG Strix RTX 4090
ROG Crosshair x670E HERO MB
GSkill Trident Z5 NEO RGB Ram 64GB at 6000 MHZ
ROG THOR 1200W Platinum II
Seagate Firecude 530 4TB NvME SSD
Corsair iCUE 7000x RGB Full Tower
Corsair iCUE H170i Elite Capellix XT Liquid CPU Cooler
Sim runs like a dream in 4K and GPU temps in the high 40’s-55ish range. TLOD 300 and OLD 200 Ultra everything else.