Hardware Should Work Better

Hello Everyone,

I have a Malibal gaming laptop with an I7 clocked at a base of 2.4 GHZ and a NVIDIA GTX 580m.

It runs games like Mortal Kombat , Need For Speed, Portal 2 (all for pc) on high with no slowdowns.

But yet I try to play super smash bros brawl with no visual enhancements and I get slowdowns intermittently though the game.

Can anyone help ?thanks in advance.