no output on video card after mobo upgrade

[mattmooresucks]

After upgrading mobo, cpu, and ram, my non-upgraded video card is no longer outputting video (though its fan is spinning).

Pre-upgrade system:
Core 2 Duo E8500 @ 3.5ghz || GSkill 4gb DDR2 1066
Asus P5Q SE/R Intel P45 || SeaSonic M12II SS-500GM
Gigabyte Radeon 6950 2gb softmodded this summer to almost 6970 || Creative X-Fi Titanium
Antec Fusion Remote MAX ATX || Win 7 Pro x64

New stuff - i5 3570k, Gigabyte Z77-DS3H, G. Skill 2x4gb Ripjaws X 1600, OCZ Vertex 4 256gb.

I've tested:
Checked all cables including both 6-pin PCI-x power going into 6950.
Re-seated 6950 and installed it into both PCI-x slots on mobo.
Removed ram sticks individually.
Checked for physical connector damage on 6950.
Removed 6950 and plugged monitor into Ivy Bridge video through mobo. This works.
Swapped 6950 with old Geforce 7950gt. This works.
Installed windows and installed new bundled Gigabyte software, drivers.
Installed old bundled Gigabyte 6950 driver.
Tried both DVI outputs on 6950.
Checked appropriate "first video output attempt = pci" option in bios.
If the 6950 is installed on power up, there's no video output from Ivy Bridge either.

I sprayed the 6950 out pretty well with some canned air during the upgrade process. Any way I could have blown air into somewhere weird and mucked things up?
Other than that it seems strange that I could have fried my 6950 - was fairly cautious with all hardware during upgrade.

I don't think I have the means to try the 6950 in another system.

Any ideas?

 

[mattmooresucks]

SOLVED :

For some reason, my new mobo isn't liking my modified 6950->6970 flashed bios. I moved AMD's handy dual-bios switch over to the stock BIOS, and everything's going swimmingly.

 

[MTDEW]

SOLVED :

For some reason, my new mobo isn't liking my modified 6950->6970 flashed bios. I moved AMD's handy dual-bios switch over to the stock BIOS, and everything's going swimmingly.

This also happens on Asus motherboards with the latest bios's.

If you still want to use your 6970 bios, you'll have to edit your "6970 bios" with RBE and change "video card ID" from 6970 to 6950 and reflash.
Just leave everything else alone and just change the Video card id to 6950 save the bios and reflash.
Then it will work fine, otherwise you'll get no video with that bios on your GPU if you leave the video card id set to 6970.

Or just do the shader unlock with your original bios and overclock to 6970 speeds manually.

Either way, you can get your 6950 back to 6970 speeds/shaders with your new mobo.