General question for SLI'ing. How do you know if your best bet is to SLI or simply buy a higher performing card? Is there a chart? I know adding a second card doesn't double performance so how do you know how much more improvement you will get?
In reference, I have Galaxy 460 GTX 1GB GC. I have it running in PCI express X 16. The motherboard is an MSI Z68A-GD80 so if I SLI the card, I will drop to x8/x8 lanes. So, in general, if I wanted to up my performance across the board and see improved FPS on max settings on a variety of games, what are my best options? SLI or buying a higher performing card? How will I know how much improvement I will get from SLI?