Next question: If I'm starting with 2 GPUs but may do 4-6 in the future, how much RAM would I need to keep this future-proof? Would 8GB be fine or would 16GB be needed? I read that you should use one slot, is that true or was that for a different reason? Also, would there be any reason to get a better CPU if I'm only ever looking at a maximum of 6 GPUs?