In February 2012, Mark Rein said "people are going to be shocked later this year when they see Unreal Engine 4".[38] Unreal Engine 4 was unveiled to limited attendees at the 2012 Game Developers Conference,[39] and video of the engine being demonstrated by developer Alan "Talisman" Willard was released to the public on June 7, 2012 via GameTrailers TV.[40][41] This demo was created on a PC with triple GeForce GTX 580 (tri SLI) and can be run on a PC with a GeForce GTX 680.[42]