I assume that the engine is more performance hungry than a game. Has anybody exported the appartement from the marketplace and ran it on a i3 or i5 ??? Would the Game run on a dual core Pc or on a i3?? With baked lightmaps, precomputed visibility and so on…
But they are for development, it depends on game you making and you need to do some testing to jurge yourself, mobile examples runs pretty fast on old PC hardware for example. Absolute minimum is SM4.0 GPU (compatible with DX10,GL3.x)