 In March 2013, Nvidia launched the GTX Titan, a consumer graphics card that uses the same GPU die as the K20X GPUs in Titan. Titan underwent acceptance testing in early 2013 but only completed 92 % of the tests, short of the required 95 %. The problem was discovered to be excess gold in the female edge connectors of the motherboards'PCIe slots causing cracks in the motherboards' solder. The cost of repair was borne by Cray and between 12 and 16 cabinets were repaired each week. Throughout the repairs users were given access to the available CPUs. On March 11, they gained access to 8,972 GPUs. ORNL announced on April 8 that the repairs were complete and acceptance test completion was announced on June 11, 2013.
