I have an Asrock H77 pro 4 mvp, gigabyte 7850, and an i5-3470 on the way for my new build. The manual for the h77 says it has one PCIe 3.0 x16 (PCIe 2.0 x16) slot, one PCIe 2.0 x16 (PCIe 3.0 x4) slot, and one PCIe 2.0 x1 slot. Does this mean that since I will be using an ivy bridge cpu that the first two slots will be running at PCIe 3.0 16x/4x? Would getting another 7850 down the line then be a waste of money, or, even if the second card isn't being used 100%, would the performance gains be enough to justify it? Could the different speeds actually cause performance issues, and end up being worse than just the single card? I've been having trouble finding reliable information on this as there seems to be some disagreement among people and little in the way of actual benchmarks and things, so thanks for any help in advance.