I just got my Sapphire 7950 and I'm trying to install it now. With the 7950 off, the computer boots fine (I'm running xubuntu and I have a Intel 3770 cpu). When I insert the 7950 into the PCI slot, the motherboard reports code A0 (meaning it is happy) but then nothing is displayed to the screen. I still have the hdmi plugged into the motherboard. Also, the 7950 lights up and the fans spin. Can someone please walk me through this? Thanks.