If it's any help, I'm running the following setup and having no issues with framerates even in 3D. This is just the alpha so performance may improve 
MSI 970A-G46 motherboard
AMD 8320 Black Edition 8 Core CPU 3.5GHz
8GB Ballistics DDR3 1066 RAM
128GB SANDisk Ultra Plus SSD
500GB 2.5" SATA 3HDD
EVGA GTX 760 SC GPU w/2GB RAM
Had the 500GB HDD already, case power supply, monitor, keyboard and mouse...The rest came in at around 720 USD. Got room to go SLI when the beta or final game comes out if need be.
MSI 970A-G46 motherboard
AMD 8320 Black Edition 8 Core CPU 3.5GHz
8GB Ballistics DDR3 1066 RAM
128GB SANDisk Ultra Plus SSD
500GB 2.5" SATA 3HDD
EVGA GTX 760 SC GPU w/2GB RAM
Had the 500GB HDD already, case power supply, monitor, keyboard and mouse...The rest came in at around 720 USD. Got room to go SLI when the beta or final game comes out if need be.