The Sapphire HD 6950 Toxic Edition ships with clock speeds of 880MHz for the core and 1300Mhz (5.2 Gb/sec effective) for the memory making it the fastest production HD 6950 on the market. This has been achieved by building the card on a high specification PCB with digital VRMs for excellent power regulation and 8 + 6 pin power connectors. It has a high performance cooler featuring a Vapor Chamber, blower fan and a new perforated backplate to increase airflow out of the system case.
In comparison to its brethren, the Sapphire HD 6950 Dirt3 Special Edition and the Sapphire HD 6950 FleX, the Toxic Edition is able to support up to four monitors in an Eyefinity set-up. With its two DVI, one HDMI and two mini-DisplayPort outputs, this card supports a wide range of monitor configurations as well. The Sapphire HD 6950 family is supported by AMD's DirectX 11 WHQL certified graphics driver which delivers support for all of the key DirectX 11 level features required for new gaming experiences and acceleration of the latest generation of browsers, transcoding and other high performance applications (AMD APP acceleration).
Source: ( SapphireTech )