The SAPPHIRE HD 6770 FleX delivers a true SLS (Single Large Surface) work area without the need for costly DisplayPort monitors or Active adapters. With the SAPPHIRE FleX solution, the first two monitors are connected to the two DVI outputs, as usual. A third DVI monitor can be connected to the HDMI output with the passive adapter supplied. The SAPPHIRE HD 6770 FleX can also support up to four simultaneous, independent monitors if you choose to include the use of a DisplayPort monitor or active adapter. Chipset Manufacturer: AMD Stream Processors: 800 Stream Processing Units DirectX: DirectX 11 OpenGL: OpenGL 4.1 HDMI: 1 x HDMI DisplayPort: 1 x DisplayPort DVI: 2 x DVI (1 Single Link, 1 Dual Link) RAMDAC: 400 MHz