Wii U Wii U Has 2GB Of Main Memory, Discs Are 25GB By Siliconera Staff September 13, 2012 Nintendo President Satoru Iwata gave us an update on Wii U specs. The system has 2GB of memory, 1GB for system memory plus 1GB for games. Wii U uses its own optical disc format with up to 25GB of data and the system has a 22.5 MB/sec disc read rate. About The Author Siliconera StaffSometimes we'll publish a story as a group. You'll find collaborative stories and some housekeeping announcements under this mysterious Siliconera Staff Writer account.More Stories by Siliconera Staff