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07 Jan 2013  

Win 7 Pro 64-bit 7601

to clarify what smarteyeball said, cards placed in SLI work on the same raw data stored in their respective dedicated ram.
Since the second card can have only 1 GB, it will bottleneck the system in case you are using programs/games that need more than 1 GB.

My best advice is to buy a better 80+ certified PSU and a better card to replace your current one.
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