Hello guys! I was going to buy a R9 290 this summer. But I found out that the 280x costs only 200 Eyros ( The Sapphire Dual X ) while the R9 290 costs 400 on it's own. So, should I go for the 280Xs ? I have heard that CF is not great and also , I have a Mobo with only 1 PCIx16. The other PCI is x4. So, if I know my facts, I will have a performance cut if I go CF. Still, the total raw power & FPS will be better than a single 290. What should I do?