I purchased a Zondac GTX 660 a few months back, and I recently wanted to hook up another monitor, as I currently only have 2.
I went ahead and purchased a new DVI cable, but when I tried to insert it in the bottom DVI port, it seems to be blocked for some reason, do any of you know why it is blocked, is it intentional, did I buy the wrong cable?
A DVI-I cable will not plug into a DVI-D port. Notice the 4 little holes around the slot in the "unblocked" port. They correspond to pins in the plug. Check to see if you have a cable without those pins.