There seems to be a lot of motherboards supporting both FM2+ A88X and PCIe 3,0. Why is that? Especially considering that FM2+ sockets are utilized (mostly?) by the A-series CPUs which bottleneck Graphics Cards of PCIe 3.0 standards. Is there a different series which utilizes the FM2+ socket? Do the A-series' integrated graphics (combined with the Dual Graphics feature) compensate for the "bottlenecking" affect?