I think what he's asking is what cases come with the new USB3 internal header.
now most cases now are USB3 but a lot come with a USB3 extension cable that connects to the back of the motherboard (into a USB3 slot). If I recall correctly coolermaster announced that if new the new internal headers are out (the one that connects from inside your motherboard to your case). they will provide the said headers with the HAF X. not sure though.
That is what I posted in the NewEgg search, cases with USB 3.0 headers.