GA-Z77X-UP5 Thunderbolt ports to tight for Mini Displayport connector

Hi,

I have two 23" Cinema displays i wan't to connect to my Hackintosh. One is connect to the DVI port and i was planning on connecting the other via the Mini Displayport to DVI adapter i use with my Macbook Air. Only problem is that both Thunderbolt ports on the motherboard are extremely tight and won't accept either of the two Mini Displayport to DVI adapters i have available (both work with the Macbook Air).

As far as i understand Mini Displayport and Thunderbolt are physically the same and i should i be able to connect the Mini Displayport to the Thunderbolt ports on the motherboard. I really do apologize if i am way of on this.

Thanks for any advice in advance

Faced the same problem!
Open the chassis, remove the motherboard, there is silver colored metal IO Shield in the back that is partially blocking Thunderbolt port.
Replace motherboard properly. . . Done!