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How to disable onboard graphics card?

ralph09

ralph09

ralph09

Associate
Joined
31 Jul 2009
Posts
49
Hey guys,

I have a Gigabyte GA-M720-US2 motherboard and XFX Radeon HD 4890 in my Windows 7 computer. Since installing a new screen - Asus VH222 - the computer has only succesfully booted 50% of the time.

Windows often tells me there was a problem with the graphics card, but is unable to fix it and won't tell me anymore. It makes me think the computer switches between attempting to boot with the onboard graphics card and the Radeon card, and only the Radeon card is successful.

I have looked in the BIOS for how to disable the onboard card but couldn't work it out. If anyone has any suggestions they will be gratefully received.

Cheers
 
Hey Jimmy, thanks for the help. I just had a good look through and couldn't find an option refering to onboad vga. There was onboard audio, 1394, lan control, but no vga.
 
OK, well in Device Manager there is only one device under 'display adaptors', which is the Radeon card, and I couldn't see anything else anywhere that looked like it might be an onboard graphics card.
 
I get the Disable/Enable on-board VGA option under Advanced BIOS Features (not the same section as on-board sound, firewire, etc.) if that's any help.

To be honest, it should just detect the PCI-E card and disable itself.
 
have a good route through the bios, there should be something along the lines of 'on-board VGA' and an option to enable/disable. Or IIRC uyou can do it in device manager in windows? Not sure how that plays out while booting up tho. GL.
 
Usually it's a jumper on the mobo that allows you to disable/enable your onboard graphics card if you can't find the option in the bios.

Check your mobo manual. It should show you how to do it.
 
Check the motherboard manual, it should be in the BIOS options somewhere, if not it will be a jumper on the motherboard itself, either way the manual should document it.
 
I've just tried downloading the manual and Gigabyte doesn't list a GA-M720-US2, only a GA-M720-US3 which doesn't have onboard graphics.

Googling GA-M720-US2 only brings up 3 matches, and one of them is this thread, the other 2 one is a forum post is Israeli and the other in Taiwanese.
 
Are you sure your mobo is a GA-M720-US2 and not a GA-M720-US3 or something similar?

I've found no evidence that this mobo exists anywhere on the gigabyte website.
 
Sorry for the confusion, you're right it is a US3!

So it doesn't even have an onboard graphics card! That would explain me not being able to find reference to it anywhere.

So why else could my computer only boot half the time? It didn't seem to happen with a Dell monitor I used to have. Only since I got an Asus monitor.
 
Changing your monitor shouldn't affect your system being able to boot or not.

Is the monitor power cable plugged in the psu by any chance?
 
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