I picked up an ASUS Z97 board that's advertised as being compatible with their Thunderbolt EX II add-in card. Since I actually need Thunderbolt, I also nabbed one of those after searching the world over.
The card arrived today and ASUS has completely botched this. The card comes with a 9 pin cable that's to be plugged into a Thunderbolt header socket on the motherboard. Naturally, the motherboard only has a 5 pin socket for this 9 pin cable. According to some information on PC Perspective's review comments for the Deluxe board, ASUS has produced an adapter cable to remedy this. The part number is 14003-00380000, however they have neglected to include it with the motherboards or the PCIe cards. It is included with the mega-super-Deluxe board that kits everything and the kitchen sink in one box, but nowhere else.
I reached out to ASUS' e-shop today and they confirmed that I cannot buy one. They sent me to tech support, who confirmed that they will not send me one but wanted to send me back to their e-shop. This was a priceless conversation, where the representative repeatedly made a fool fool of himself. After going over and over the issue, he suggested that I try to buy this from a retailer such as Newegg or Amazon. Of course neither will sell the part, nor should it be necessary to buy something that was supposed to be in the box to begin with.
If anyone has contacts at ASUS, I'm sure they'd like to fix this oversight since it seems others are unable to use their cards as well. Otherwise, to the other 2 people that need Thunderbolt, buyer beware.