New video card

My video card has been playing up lately.  I went out on Sunday and bought a GTX480 but I haven't installed it yet.  I should have done it - the longer I wait the price might go down!  I wanted to get a Gigabyte one but they only had an Asus one left.  I've noticed more crashes lately with the video card... I hope I can last tonight.  Maybe I should install it tonight after the kids go to bed.  But I don't want to miss raiding tonight.