I have a desktop, which i use for light gaming (simcity, etc.) The specs are AMD A8 6660K and 1GB AMD Radeon HD 8570D (DDR3) and finally 6GB of DDR3 ram, at 1066MHz. Is it possible to add a dedicated graphics card to it without removing The APU? for exmaple i've been looking at a Nvidia GTX 650 Ti.