hi,
first at all, two GTX 260s + (216 streamprocesser) are not any better than two GTX 275s (240 streamprocesser), and single GTX 275 is little bit better than GTX 280.
Second, nforce 680 has 2 types, one is nforce 680i LE(LITE version), another one is nforce 680(full version), so what type is yours?? only nforce 680i full version has 2 PCIe (X16 single, X8 SLI) slots, and both PCIe slots are PCIe 1.0 version.
Third, if you want to do SLI with these 2 cards, I think 850 watts with 80 plus powersupply is good enough... but if you wanna do the triple SLI later, I think you should buy 1000+ watts powersupply for later purpose.
hope those information can help you out.. good luck
Scott |
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