If I wanted to buy myself a computer that I can stick that 4090 into, what's the minimum amount that I would spend such that I don't end up bottlenecking the GPU.
Not for gaming, if that makes any difference.
Not for gaming, if that makes any difference.
For example, for fast 3D renders of small scenes you just care about processing speed, large scenes need good memory bandwidth too, while with LLM training you'd care more about available VRAM, and so on.
But, just to throw out a number out there, you could probably get away with spending as little as 300-400 USD for just a motherboard, PSU, CPU, cooler and RAM, assuming you don't want things like storage, cases and whatever accessories. Basically use it as a server.
Link: https://pcpartpicker.com/user/erichocean/saved/#view=dwDV4D
You could save quite a bit on the motherboard and CPU/cooler if you want to cripple that part of the system.