It uses AMD GPUs and supports the vital DirectX 11, with 800 stream processors and 40 texture units for accelerated bits and pieces. The core clock speed sits at 840MHz, twinned with a 256-bit interface to 1GB of GDDR5, zipping along at a speedy 1050MHz - effectively, sapphire says, 4.2Gb/s. The HD 6790 is of course also supported by AMD's DirectX 11 WHQL graphics driver, which props up all the DirectX 11 you'd want to get your fill of.
There are two DVI ports, one HDMI port and one DisplayPort output which means you can set up different displays as you fancy, while Eyefinity means you can have three running if you like.
In the card, there's an enhanced tesselation unit, HDR texture compression, multi-threaded communication with system CPU cores, HDMI 1.4a and stereoscopic 3D support. In terms of media, the card has on-board Unified Video Decoder which can reduce CPU load and decode Blu-ray and HD on VC-1 and H.264 codecs in a speedy manner. There's multiple video coding for Blu-ray 3D, too. For audio, there's support for Dolby TrueHD and DTS-HD Master Audio.
Sapphire boasts that the card has a "very modest" active power consumption, making the most of Dynamic Power Management to keep idle mode at low power too.
As usual you can buy the kit through Sapphire's website.