I am planning on building a new computer with Sandy Bridge and I was planning on using the Antec CP-850. Assuming that the motherboard I purchase has an 8pin connector for th CPU what cord would I connect to that spot? Would I just use the 4 pin ATX12V or the 8pin EPS12V? I have read that the EPS is not compatible with ATX, but I am planning on putting this into an Antec P183 case so I would like put the CPX form factor into the case. Thanks for your help.