Tested GTX 1080 Founders Ed. with everything overclocked (with MSI Afterburner) to maximum possible without errors and it tops out at 451 h/s with average ~425 h/s (with ccminer); 'also elevate priority of miner task to ABOVENORMAL to mitigate intermittent slowing from Windows system background tasks that run at NORMAL priority, such as the TiWorker update task.  'anxiously await Linux Claymore so we can run eight AMD GPUs instead of the Windows max. of six.