1. yes its compatable. the modu87+ is a good psu. all modern mobos to my knowlege has at least 1 pci-e slot
2. no there is no bottleneck, BF4 is optimized for multi core use(moreso than its predecesor) and the game even becomes less gpu bound when the december AMD mantle patch rolls along.
I know Mantle isn't out yet but how much of a performance increase will we see with it?