The HD6950 is a fairly mature card, which means that the top tier partners have had time to perfect their designs and implement functional improvements.  Sapphire chose to customize the cooler on their DiRT 3 Special Editon HD6950, which [H]ard|OCP took advantage of to focus on overclocking.  Sapphire’s TRIXX Tweak Utility played a big part in their testing, especially when overvolting the card.  Check out the full review here.

"Overclocking a video card provides a better gameplay experience, or so every enthusiast hopes. Today we have the Sapphire HD 6950 2GB DiRT 3 Special Edition on our gaming rig to see how well it performs and overclocks using Sapphire’s TRIXX Tweaking utility. Will this overclock yield a better gameplay experience?"

Here are some more Graphics Card articles from around the web:

Graphics Cards