Hey, I just got the MSI Radeon 7950 3GB blah blah and tried to install it in my pc I built. It doesnt boot or show video at all and it gives 1 beep then 7 beeps then another beep.
I have AMD FX-6100 CPU, a 5.1 rocketfish soundcard, 2 sata II HDD's, and 4 case fans and 14 GB of Ram(4gbx3 and a 2gb stick). My PSU is 880 watts.
I have tried reseating the memory, unplugging all the fans and HDD's, putting a comforter over it to heat it up and cool it(saw it on youtube http://www.youtube.com/watch?v=2rW0M1htCZ0 ) , spraying the dirt out, redoing the the thermal paste on my CPU and thats it.
It worked like 4 hours ago with my GTX 550 Ti when I was playing Garry's Mod.
If your motherboard is using a AMIBIOS, 8 beeps means bad VRAM on the video card. Re-seat the video card be sure the entire card bus is in the slot. If it still fails try putting the old card back in and see if it works.