Windows 7: Trouble booting Win 7 with SAPPHIRE VAPOR-X HD 4870 2GB

Hello all,

I just built a new Win 7 system and my monitor goes black right after I get to the starting windows screen, and says, "monitor going to sleep." When my speakers are on, I hear the sound for windows booting all the way, my monitor just always goes dark before I get there I can see everything on screen just fine up to this point, it just can't seem to make it all the way.

I swapped out my SAPPHIRE VAPOR-X HD 4870 2GB GDDR5 PCI-E and replaced it with my old XFX Alpha Dog Edition 8800GT and no problems it boots right up, perfectly stable.

The SAPPHIRE VAPOR-X HD 4870 2GB GDDR5 PCI-E was working the other day on my XP build with an older Gigabyte mobo. Nothing I have tried is working.
I have the most current bios from my new MOBO utility, I have tried clean installs on new hard drives, (formatted, new partitions) etc.



PLEASE someone help this is very frustrating!

-MSI NF980-G65 AM3 NVIDIA nFORCE 980A
-AMD Phenon II x4 955 Black Edition 3.2Ghz
-G. Skill 4Gb (2 x 2Gb) 240-Pin DDR3 1600
-Antec Earth Watts 500 psu
-ATI Radeon Vapor-X Sapphire 4870 2Gigs DDR5

Remove any tv or second monitor from the system. Leave only one monitor attached. Then boot to Windows.