HD4870 has stoped my sound card working

[Latro_]

Posted this in the sound fourm too but it is just as much to do with graphics

Okie so I have just added a Radeon HD 4870 to my system. I have a sound blaster X-FI PCI card on there.

this card worked fine but now Windows 7 wont acknowledge it is even attacked to my pc.

I have a:
P5W DH Deluxe ASUS Digital Home Series Mobo.

I'm thinking some how at boot the audio properties that are part of this gfx card are stopping the X-FI card from working. Its most frustrating as I don't really want to try and revert to the Mobo's on board sound.

Anyone come across this problem before?

 

[Latro_]

Hi there

As i mentioned Windows 7 does not recognize it. Just says when doing this:
'No audio device installed'

(i have turned the onboard sound off in bios and disabled 'ATI High Definition Audio Device' in 'Sound, video and game controllers' in Device Manager. )

If I enable ATI High Definition Audio Device in device manage and then go to play back devices I get:
'ATI HDMI Output'

 

[Latro_]

Yep first thing I did was move it down a PCI slot, no joy.

By resetting do you mean factory default? It was a custom made PC and as semi techi as I am i'm unsure if they twiddled anything else in there, so i'm hoping this might be a last resort.