I have this motherboard in my machine.
I have installed an NVIDIA GeForce 8400 GS in the PCI-e x16 slot.
I have two monitors connected to the GeForce, and they work perfectly. I have connected a third monitor to the onboard display adapter, but the third monitor doesn't function at all. Windows Device Manager doesn't detect the onboard display adapter, pointing to the motherboard/BIOS disabling the onboard display adapter while an additional display adapter is installed in the PCI-e slot.
Is it possible to get around this issue, by customizing the BIOS configuration or installing a third-party BIOS image?