ASUS has confirmed that their Z77/H77 Chipset motherboards would get Thunderbolt support through aseparatelysold expansion card which would hit the store shelves on 27th April.

For now there are only a couple of motherboards such as the unreleasedIntelDZ77RE-75KandMSI Z77A-GD80 which offer Thunderbolt support, With the new expansion card (Cactus Ridge 2C controller from Intel on a card) most of ASUS motherboards would get functionality for the new feature.

The expansion card would be configured with the Z77/H77 PCH through an header onboard the motherboard marked asTB_HEADER.

Image credit goes to Vr-Zone (source)

Following are the models which support the new feature:

Maximus V GeneP8Z77-V DeluxeP8Z77-V ProP8Z77-VSabertooth Z77P8H77-VP8H77-M Pro