Hello, I have 2 Sapphire HD6950 2GB GDDR5 cards which I tried to unlock them to 6970. I flashed them via winflash, got some ID error, and then flashed them in cmd mode and all went just fine. BUT, it shows 1536 unified shaders in GPUZ and the clock speeds on 250mhz. also the windows goes slowly (I use win8 pro 64bit). and the most noticeable strange activity, is when I restart the pc, and there is no screen, even the windows logo isn't show up, and after a half a minute or so the windows showing up with slow movement. When I get the switches back to stock position (2) all runs great (stock mode)... what went wrong?? should I flash them again? note: I flashed them one by one, removed each card physically.