For my GA-78LMT-USB3 motherboard having ATI Radeon HD 3000 onboard graphics and AMD Radeon HD 6450 1 GB DDR3 GPU, I get 4.7 as Windows Experience Index rating in Graphics (not Gaming Graphics) in Windows 7 Ultimate. Would please somebody inform me what will be the possible Windows Experience Index rating if I remove my GPU and work my PC with motherboard support only? Also, can anyone tell me what will be my on board graphics memory?