Mojave, 750ti installed, boots fine but only the mainboard hdmi port works.

I though this doesn't work and I had previously always removed my card. But mojave just counts it as a second display, but displays giolockscreenstate3, which is fine by me as now i only need to unplug my hdmi instead of the whole gpu. Card is a palit 750ti that doesn't have psu power connectors. Just wanted to let you guys know!