"you dont plug it into the V5, the connector on that card is for input only. So is your fan with a 4 pin connector or 3 pin ?"
you're supposed to take a free case powerplug and put into the V5, it uses so much power that it would have troubles getting it through the AGP slot......now, I'm sure you know this, but what did you mean?
The fan has a home-made 4-pin thingy (one of those that go to your HDD, Drives and such), although there's only 2 pins in it (and I'm trying to find out if these are 5 or 12V, by telling you that it goes to a Celeron fan, which runs as it's supposed to)