Msi r6670-md1gd3 radeon hd 6670 1gb 128-bit ddr3 pci express 2 1 x16 hdcp ready


I'm afraid you need to supply a bit more information than that. Motherboard? Processor? Have you had a working card in that sot before? Is your HD 6670 new or used? HDMI slot? Do you mean port? Are you using analog VGA, digital HDMI, or digital DVI port for your monitor?