Sounds like you've got a handle on things then, if you're already playing with those settings.. out of curiosity, are you able to access the BIOS settings with the monitor connected to the GeForce, or do you have to use the internal graphics to access the BIOS settings? If you can't use the GeForce to access the BIOS, that would tend to suggest the card is fried.
It sounds as if you're doing things right..
According to TechArp
PEG Force X1
Common Options : Enabled, Disabled
This BIOS feature allows you to convert a PCI Express X16 slot into a PCI Express X1 slot.
When enabled, the PCI Express X16 slot will be forced to run in the PCI Express X1 mode.
When disabled, the PCI Express X16 slot will be allowed to run in its normal PCI Express X16 mode.
If you have a PCI Express X16 graphics card installed in your system, you should disable this BIOS feature. This allows for optimal performance of the card by ensuring maximum transfer rates between the graphics card and the motherboard.
But if you need to install a PCI Express X1 card into the PCI Express X16 slot, you should enable this BIOS feature to ensure maximum compatibility.
The only other thing I'd suggest you check is that DVMT Mode Select is enabled (not
set to FIXED, in other words), and that DVMT/FIXED Memory is set to 256MB, and not
128MB. After all, you may as well get the best possible performance you can out of the on-board graphics.
Do you have a copy of the User Manual for your MoBo? The section on BIOS settings is pretty useful, even if they don't explain things too well sometimes, forcing people to google stuff.
If not, I stuck a copy of it in my box.com account for you. You can get it here
. There's also an installation guide for your board, which might come in handy some time. You can get it here