Ever find this?
I browsed through the site VC reviews but i didnt find the number, the higher temps on a thermal imaging are for a GTX 690 and it s possible that theses are this card VRMs since the surface thermal imaging goes up to 111.9°C, i ll ask the reviewer personaly though.

http://www.hardware.fr/articles/864-4/releves-thermographie-infrarouge.html
Edit : back on topic, the same reviewer said the Titan Z thermal headroom was limited to 375-400W by Nvidia with a 83°C max GPU temp.
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