I'm planning to get a GTX 770 as my GPU upgrade and I've read nVidia blogs that 990X and 970 series motherboards have been enabled to support SLI. Then again on some forums I've read that the only 970 motherboard that supports SLI is the ASRock 970 Extreme 4. So my question is, will my ASRock 970 Pro3 motherboard support SLI?