Hello there and thanks beforehand! I have an AsRock am3+ 970 Extreme 4 http://www.amazon.com/ASRock-MB-970EX4-970-CrossFireX-Motherboard/dp/B0058HUQJ0/ref=sr_1_4?s=electronics&ie=UTF8&qid=1331497453&sr=1-4, my concern is can I do 2-way SLI AND use a third nvidia card as a dedicated physx card? Any help is much appreciated!