I already own a GTX 580, and was wondering if I should buy a second one for an SLI setup. I would need to upgrade my PSU (any recommendations?), but I could use my old one to rebuild an older computer. I am thinking about buying used, so a new PSU and used 580 would probably cost me about $300 to $400. My alternative is to sell my current 580 for $200, and then buy a 680. What is recommend for my situation? The first option is appealing because I can salvage an older computer, but I also like the idea of having a single card and not having to upgrade my PSU. Either way, it'll cost almost the same. I have a stock 1.5gb 580, for clarification.
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3/31/12 at 1:28pm