I have an ATI Radeon HD 4800 Series graphics card as my main GPU currently and a Nvidia GeForce 8400GS for the secondary displays. I am planning to get a Nvidia Shield tablet soon so I want to get a new graphics card to use the game stream feature. I want to spend about $100 or less. Please put amazon links and price if you have them and if the card is better than my current card. Thanks!