I have just bought a HP Notebook - 14-af113au which has 4GB hynix 1RX16 PC3 L 12800S ram from Trademe to use as a TV box, But the video is jerky whilst tryingto watch TV would I benefit by upping the ram to 8GB or is not going to be very good as its a 1.5 GHz AMD Quad-Core A4-5000 APU with Radeon HD 8330 Graphics