sadly to say after fitting my water block to my 2nd force 3d hd4870 has randomly decided not to work ive just got my new water loop all setup in my case and ive fitted the xspc full block to my card all fine but plugged her all up and no responce noticed my pc posted but no display tried both pci-e slots nothing wack my trusty 7900gs in display straight away tried to put stock cooling on it still does the same thing do you think i have broke my card ???? p.s ive just changed psu because my other one failed.... when i just got my water cooled system all sorted think that may of cause anything ????