So I'm new to the whole AMD APU scene don't really know much about them. My girlfriend has an HD 6850 in her computer with an old Core 2 Duo CPU. I can get an A8-6600k with an Asus A88XM-A Motherboard for $100 canadian. Will they work with my video card or is it worthless. Also don't really know the difference of running them in crossfire or what since the APU has a built in chip. Please explain like I'm 5 lol.