Hi guys I think nobody found that yet, but with matrix bios it's ok. Now I can overclock it to 1200Mhz - and voltage control is opened. But works with just Gpu Tweak. If my GPU was quality, I think I can go over. My limit is 1210Mhz for 3Dmark11 Before Now and highest score And 3Dmark scores - Firestrike Graphic - 8845 http://www.3dmark.com/3dm/433688 This bios is ok http://www.techpowerup.com/vgabios/130255/Asus.HD7970.3072.120813_5.html Afterburner, Trixx and others can't adjust still. But it'll be at 1.256V (before 1175) Gpu Tweak is ok. As you see, it's Matrix Platinum now And works great, no problem with it. MY GPU isn't good enough. May be I could go over - 2400 - 2600 ... But before check your GPU, is it working @1100Mhz. Because after flashing, it'll be at 1100Mhz automatically.