The VisionTek Radeon HD 5450 Series GPUs fully support Microsoft DirectX 11 Dolby TrueHD and DTSHD Master Audio Support: Content protected, high bandwidth, 7.1 channels of surround sound over HDMI. Avivo Technology Enhanced Unified Video Decoder 2 (UVD 2) Dual or Two Monitor support: HDMI, DVI, VGA (configurations require an adapter that is sold separately). Designed for full size case installations PCI Express based PC is required with one X16 lane graphics slot available on the motherboard, download of updated video drivers may be required to use this unit Only supports up to two monitors Designed for full size case installations Be aware that you may need to download updated video drivers to use this unit