I've got exactly the same issue with a similar setup.
My original software install made no mention of Quick Sync at all until I installed the latest update, then the acceleration check box started mentioning it but remained greyed-out.
My motherboard is a Gigabyte GA-Z68MX-UD2H-B3 and processor Intel 2500K so we have the same chipset and processor.
Rendering works fairly quick but I suspect that the Quicksync is not actually operational by default. (I'm not really sure what speed to expect)
I've raised a support ticket - If you have not solved this issue then I suggest that you do the same to add weight to the request.
Cyberlink are heavily promoting the Quick Sync support on their web site. I chose Powerdirector specifically for this reason, so do I expect it to work!
- Steve