I Just returned from vacation. Below is the reply from Zotac. Needless to say, I don't care if the card works under windows and I have no intention of wasting time installing a whole OS just to hear "works under windows, must be ok, not our problem." If you are aware an issue with the vbios, can you forward the information to Zotac through your channels?
Sorry that the current Linux support is limited. To verify the function of the card, you may try to install Windows. If you do not have Windows, you could download a Trial version. After install the Nvidia graphic driver, you could read the graphic card memory size from the Nvidia Control Panel > system information.