Question GPU No display but Monitor shows display in Onboard Graphics (MOBO) even though GPU is plugged in.

[Kalestein]

So just like in the title my MoBo (H81M-DS2) shows display even though my GPU (GTX 760) is plugged in. But when I connect my (HDMI-DVI) to my GPU it doesn't show display at all.

 

[Bassplate]

Maybe go check in your Bios If your PCI Chipset is set To PCI Express and not PCI and make sure your Chipset is enabled.
When you power Up the System Does the Graphics card's Fan Spin?