Hello im thinking of going SLI was thinking another MSI 47o, or wait and sli 560.. soon and what PSU you recomend? but what PSU is good for SLI if i deicide to go down this path?
I would say 850w or above if you want to run 470s in SLI, Corsair AX1200 would be a good choice or maybe a 1000w NZXT Hale90. Corsair HX850 or AX850 or the equivalent Seasonics or NZXTs should also work, but I would recommend having a little buffer.
Find a quality power supply that stands up to its specs when reviewed. Consider what else you're connecting to the PSU (number of harddrives, etc.). I've been running an amd 965 and a pair of 6870s on a 625 watt psu (that's supposedly a good one according to reviews) and a ~650 watt no-name UPS, for months now.