MacRumors reports that Apple has quietly launched a repair program for some late 2013 Mac Pros manufactured between 8 February 2015 and 11 April 2015. The program covers Mac Pros with AMD FirePro D500 and AMD FirePro D700 video cards experiencing distorted video, no video, system instability, freezing, restarts, shut downs, or an inability to start up. The program does not cover Mac Pros equipped with the basic AMD FirePro D300 video card.
Apple and Apple Authorized Service Providers will repair affected Mac Pros for no charge until 30 May 2018. Contact Apple Support to determine if your Mac Pro is eligible for coverage and to get the graphic card replacement process started. MacRumors says that Apple is unlikely to announce this repair program publicly, but the company may contact some owners directly.