GPU: ASUS ROG STRIX 3060ti
CPU: i3 12100f
CPU fan: Noctua NH-L9i-17xx chromax.black
Motherboard: ASUS ROG STRIX B660-I GAMING WIFI DDR5
RAM: G.Skill Trident Z5 2x16ГБ DDR5 5600
PSU: Super Flower Leadex III 850W 80 Plus Gold
Case: Cougar Dust 2
Case fans: 2x Noctua NF-A12x25 PWM
SSD: Samsung 980 pro 256mb + Kingston SNVS2Tb

About ITX formfactor. I've built a lot of small computers before. And believe me, this beast is one of the best, thanks to its not-so-small case, it can accommodate any 30/40 series video cards. In the photos you can find it in comparison with the MacBook Pro 15.

Last screenshot - powertest in the OCCT
CPU Work/MAX Temperature: ~75/85
GPU Work/MAX Temperatuer: ~50/70

Avr FPS in game titles (Playing in FullHD 240hz/4K 120hz TV):
Cyberpunk: ~120/40 (medium settings)
CS2: ~280 (ultra settings) haven't run on TV lol
RDR2: ~120/60 (hight settings)
Helldivers2: ~80/50 (ultra settings)
Marvel Spider-man remaster: ~240/90 (ultra)
Mount&Blade2 Bannerlord: ~240/80 (ultra)
Apex: ~200 (ultra) haven't run on TV lol

So this is really nicely PC build. In addition, I want to say that I changed the thermal paste on the processor to Grizzly. If you want to pump up the processor, you can remove the top 2 fans and install 2 section water cooling (check Cougar Dust 2 spec)

If you really need it, I can install and configure the operating system for you :)