I read in the most recent $1000 system build here that they changed the msi config file to allow greater OCing. I looked into the afterburner file and found what I think is the config file but when I change it it will not let me save the file. So my question is how do I get Afterburner to allow me to OC my 6950 further. I have just swapped out my reference 6950 with a twin frozer model and want to see how high it will go but Afterburner wont let me past 840 core and 1300 mem????