Apparently one can put different cards together. Can anybody weigh in on a 770 and 780 together? I'm curious because nvidia most likely will be dropping prices in the next quarter and I'd like to add more hp to my machine down the road.
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Nope, can't be done. You can only SLI/Crossfire two of the same card, or in Crossfires case, two of the same GPU (e.g. 7950/7970).
Match what ya got.....cant mix card series.....pick 770s or 780s
Same speed, same RAM, same model / manufacturer would be wisest but not necessary .... pair will run at lowest of available speed, memory