Will this GPU support two monitors?

Yes, although I don't know if it will support all combinations. I had it running two monitors off the DVI and VGA ports

Does this need a power connector to it, or is it able to stand alone without one?

Stand alone, this video card does not have a power connector embedded on the card itself.

I'm sure if you go to the Nvidia website they would have drivers for most if not all OS systems

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ASUS GeForce GT 730 2GB DDR3 PCI Express 2.0 Graphics Card GT730-2GD3

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