I don't know if I'm missing something because I've never had 2 video cards before.  I have a 5850 and a 9800gt but I was giving the 9800gt away anyways and I was going to get a 5770 for my second card.  My power supply is an antec earth watts 500 so it should be good (defiantly enough to boot up at-least right?).  When I tried adding in my 9800gt my computer gets stuck on the windows 7 booting screen, It wouldn't take 10 minuets the first time would it?

I have an old 135 watt (idle) psu with 4 pins on it so I have a booster if I need to use it.  and my 9800gt works fine when its the only card and my 5850 of coarse.

My system is an AM3, 2 crossfire slots, a pheonom ii dual core but its oced to 3.5 and uses 3 cores, 3 ram sticks, a sata hardrive, 5 fans and not much else (using power)

I should note that I have to change back to dual core in bois in order to install windows so I thats another thing I can try.

I guess I'll try another 500watt psu combined with myn from another computer to make sure power is not an issue but I wanted to ask first.

Thanks