I just tried mine with GPU-Z's render test and it went to 100% after about 2-3 seconds. Must have a slow update time.
Do you have more than one gfx card?
OK. At least you know the GPU is performing normally. But it is strange that CCC reports zero. If you feel it's worth it to uninstall/re-install the driver/CCC package again, maybe that will fix it. Do you have the latest driver?
I have recently updated the driver from version 1.3 to 1.4 so yeah big jump for me. Still the issue remains. If its not a big issu ei think i can live. I can see the 12v and 5v things for what that matters.