I currently have a HD 6950 DCII 1GB card from Asus, which was, when I had my 1080p monitor (on a single link dvi cable) unlocked to 1536 shaders, when i got my new 2560x1440 monitor there was an extreme amount of pixelation, making all texts and most images hard to see, however this was fixed to switching over to a bios with the default 1408 shaders. What seems to have gone wrong here? Can it be fixed? I'd really like to unlock it as it had been fine at 1080p and the card pretty much refuses to overclock when it's not unlocked, and at 2560x1440 on a 6950, I'd really appreciate a bit more performance. Thanks in advance.