Hi, I have a Nvidia Geforce 6150 LE onboard video card, and I recently bought a EVGA Nvidia Geforce GT 620, and for some odd reason my computer doesn't seem to detect it, I've tried looking for it in the device manager and it doesn't pop up, I've looked in the BIOS to disable my onboard video card, but there's no option for that, only to select what I would like for the primary video input, and I selected PCI-E, I'm stumped and don't know what to do, help?