Antecs 850 v 8800GTX

Installed Antecs 850 watt to power my 8800 GTX. What is this problem report "the NVIDIA system sentinel is reporting that the NVIDIA powered graphics card is not receiving sufficient power" Under vista I was not getting this warning, but when I upgraded to XP this message pops up after I restart. I don't see any difference when gaming. Movies run fine. Has NVIDIA said anything? Thanks again.

I had the exact same thing happen with my Antec 850 and 8800 GTX (without the Vista bit). Tried
everything. It wasn't really affecting games too much like you say,
but you could certainly see the difference in some and especially in benchmarks.

Went back and traded it for an Antec TP650 and it's been working
perfectly since. Thinking back, I don't think that I ever saw that I
had to plug in two plugs to the motherboard. What motherboard are you
using?

I'm not sure if the 4 pin auxillary 12V plug would power the pci-e
slots, but I think I remember reading something like that and it makes
sense.