Ok So here is my situation i am upgrading to a 8320 and a new Gigabyte motherboard and my brother is also upgrading his pc and he is giving me his old 6870(I have the same exact 6870) So i am going to Crossfire them and i have a CX600w And it only has 2 6+2 pins would it be safe for me to run crossfire with 2nd GPU using Molex to 6 pin? until i upgrade to a CXM750.Probably would be running like that for about 2 months..Or is that not going to work at all?