I bought another GTX 460 1GB 256-bit card in order to run in SLi and I noticed that this new one I bought(got it on ebay) only has 1 PCI-E power port on it. My other has two. I checked with GPU-Z and verified the graphics card has the same specs except for 1 thing. It's underclocked by about 25MHz on the core clock and 50MHz on the memory. I still haven't tested them in SLI.. Don't even know if they will work in SLI.