Money is not an issue (... well it is, I'm not buying the new 590.....), I'm just wondering what would give me the better performance for gaming, one GTX 580 or two GTX 560 ti's? Thanks in advanced for any help!
sorry I don't know that much about video cards so this may sound stupid.
EDIT: if it matters my motherboard is ASUS P8P67 Pro and I'm running on one 27" monitor
a Single 560 beats a single 470 by a bit, but in SLI the 470s scale better than the 560s... Which means in SLI they are about the same.
The SLIed 470s have a greater power draw than the SLIed 560s. Meaning you need a bigger power supply.
The SLIed 470s have more memory than the 560s which means that at higher resolutions the 470s will outperform the 560s
If your 27 inch monitor is 2560 x 1280 the 470s would perform better. If you have a 1920 x 1080 monitor performance is a draw so I'd go with the 560s to save on the power bill.
I'd get the GTX 580 then pick up a second one on Black Friday this year or next. Better graphics for longer--unless you're more into the NOW thing--then easy GTX 560's/470's. The 470 price jumped back up though, so it's probably worth the cooler & quieter 560's.