Be more specific - AI is a very broad field. nVidia GPUs have the best inference speed (particularly around SDXL, Hunyuan, Flux, etc), but unless you're buying

Be more specific - AI is a very broad field. nVidia GPUs have the best inference speed (particularly around SDXL, Hunyuan, Flux, etc), but unless you're buying several used 3090s SLI style, you're going to have to split larger LLM GGUFs across main memory and GPU. I'm excluding the RTX 5090 since two of them (plus tax) would basically blow your budget out the water. With Apple I think you can get up to 192GB of shared memory allowing for very large LLMs. Another thing is your experience. Unless you want to shell out even more money, you'll likely have to build the PC. It's not hard but it's definitely more work than just grabbing a Mac Studio from the nearest Apple Store.