I would like to upgrade my HP Pavilion P6731a with a new motherboard, video card and put in a sound card.
I did put a GTX 650 video card in and had trouble with pixelating. I upgraded the PSU to a 850W which it had a 250W which explains why it had nothing it the case.
I am wondering whether this pixelating was because I put a NVidia Geforce card over a Radeon card that was in it before.
More about :upgrading motherboard videocard pavilion p6000 series
It means the card is bad. You should RMA the card.
What brand of PSU did you go for?
Sorry for the delay but had to build another computer, the Pavilion I put a no name PSU in it a 850W and seem to fix the problem up. I changed the video card to the GTX 650 1G card and it runs ok now. I did build another computer due to so many issue when trying to upgrade a HP computers.