AMD Phenom™ II X6 1075T + ATI Radeon™ HD 6450 1GB for gaming.?

a 6450 is an entry level card. it wont run games very well, but was never really designed to. you'd be better off getting the cheaper card (which is better then a 6450 in the first place, just casue its a lower number doesnt mean its slower, a 4870 will run circles around both those cards) and replacing it (along with the power supple most likely) with something better