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use for simple game

Hi, i noob in game development and i have stupid question.
Currenly i have MSI GeForce GTX 650 videocard and a blank screen loads a video card up to ~ 50-60%
Unreal engine have amazing tools and i’m dont understand can i’m use ue4 for creating simple platformer game or space shooter?
How i can change settings to reduce GPU load? of this engine only for coolest video cards?