Hi.. I have Dell Inspiron 5520 with switchable graphics Intel HD 4000 and AMD Radeon HD 7670m. For few games like Batman Arkham City, it works well. But for other Games like The Witcher II and Max Payne III my laptop uses Intel graphics card rather than AMD GPU even if i select high performance from AMD control catalyst control panel.Consequently, these games runs at very low frame rate. Can someone help me in this regard please???