I'm looking to buy a new motherboard and I'm worried about compatibility. My processor is AMD Athlon II 2.9MHz. How do I determine if the motherboard can work at that speed? Does it automatically detect CPU speed or do I have to be picky? My current motherboard has 2 memory sockets, DDR3 1333MHz. I thinking of getting more for the new motherboard. Can I mix memory boards that have different speeds? Is there any compatibility issue I should be aware of? Or is it all plug-and-play? -- Don't stop where the ink does. Shawn