Originally posted by Krusty
SLI is really just a sales pitch. It's like 8 cores in a computer. You don't get extra performance from it, you just spend more money.
While you get insane FRs now, you'll only get maybe 15% more fps with the second card, at more than double the cost (counting price of high-end SLI motherboard and high-end PSU with dual PCIe plugs and extra connectors, etc).
I say live with the empty slot. Use the money on a faster CPU or more RAM or water cooling. You won't gain at all by wasting it on another vid card when the one you have is already getting "insane" FRs.
I agree Krusty. For the end user, SLI is basically a bragging right at this point. A very expensive bragging right, especially considering the price drops the average "high end" video card undergoes only months after launch.
I do think that the 8 cores in a computer might actually help one day. The reason being is that they are becoming so cheap. Most ever new PC now will have at least 2 cores, so it is inevitable for developers to write multithreaded code as everyone comes to own a multiprocessor system.
But SLI will probably never be cheap enough and thereby pervasive enough for developers to ever spend a great amount of time making games with a level of graphics that would require the 2nd card.
But...who knows.