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?
Actually, RAM 4GB is enough.
Are you mean Ram slots?
if true, one slot or using all slot no problem. ex 2x4GB or 1x8GB or 2x2GB
Actually yes, but memory prices are cheap compared with GPU. So why not to buy 8-16 GB memory for RAM and save some HDD