I'll be purchasing the same gpu a while from now to have two. I'm just wondering if I can buy an sli for now and use it on one. Would that do anything at all to the sole card's performance? I apologize if this is a dumb question.
Yes, it would still work. An SLI motherboard can still accommodate a single gpu. It just happens to also be able to do two Nvidia gpu in SLI as well if you plan to use SLI.