I am planning to upgrade my very old computer specifically the video card. I have an aged Foxconn A74MX-K motherboard running on AMD Phenom II X3 CPU. I know I need two 6pin connectors for power for the R9 380 and 285 graphics cards an I already devised a plan on how to make that happen, i.e. cable adapters/Y connectors etc. But the main question is will the motherboard be able to support those cards? Appreciate the help and answers you can provide.