I've just bought an Oculus Rift, and am wondering whether I need to upgrade the graphics card. This is probably a really N00b question, as I don't know a huge amount about graphics card performance, but at the moment my PC has 2 SLI-linked NVIDIA GeForce GTX 760 2GB 16X PCIe 3.0 cards. The recommended spec for the Rift is a 1060, and I'm considering getting the 1070 Ti, as it would enable SLI should I want it in the future. The question is: is that ACTUALLY going to be much better performance than the two 760s? Or with both the 760s there, is getting the 1070 Ti a waste? Sorry - as I said, it's probably a really stupid question to someone who knows a lot more about this than I do!