I have just installed an Sapphire HD6450 into the PCI express port of my DC7900.
Want to be able to use an HDMI port to connect to my TV.
Whenever I try have it installed it will only show a black screen (it boots up but can't see anything). Happens in either PCI-E port.
As soon as I remove it, the computer works fine again.
Have tried checking the BIOS to see if I need to disable the onboard graphics, but there is no setting in there to disable.
Checked under Advanced / Device Options and not there. Have checked other menu items but can't seem to see anything.
Have BIOS 786G1 version 1.24A
I have a DC7800 in my lounge and didn't have an issue installing the same graphics card to that.
Please Help!