Ok, so this is probably going to be a simple solution, but I need some help here. I just upgraded a friends system, from a 5670 to a 6850. Now he didn't have a 6 pin, so I just used a molex adapter. The issue is that I had to take one of the molex's from a case fan, and he wants that fan running again. He does have an extra 4 pin open, so is there any way cable I could use, or make, that would let me convert the 4 pin for use with the molex?