When it comes mixing and matching different types of graphics card and running them in either SLI or CrossFire mode you are bound to have a number of problems. You will not find too many people advising in trying this, but the video card companies are working hard at making this work. Today, we are looking at ATI's budget friendly Radeon HD 3850 and Radeon HD 3870 graphics cards to seeing how they work together in CrossFire.