If you have questions related to existing orders or activation keys,
please call customer service at 1-866-540-1140 Monday through Friday
between the hours of 7:00AM and 5:00PM Pacific Time.

For technical or product-related questions, please click here to go to the
NVIDIA FAQ and Knowledgebase:
http://nvidia.custhelp.com/cgi-bin/nvidia.cfg/php/enduser/std_alp.php

For other questions, please send an email to store@nvidia.com