Cornerbog :
Sorry, forgot to reply instead of answering. As I just said, is there any performance difference. Or should I just go with the M-ATX because it's cheaper
"mATX motherboards are often cheaper. They are obviously smaller, and usually lack the extra PCIe slots. They are capable of fitting in the smaller cases. If you've got the budget and room in the case, I usually recommend ATX motherboards."
"Choose an ATX motherboard if you're going to be running CrossFire/SLI as there are more expansion slots. Also, ATX boards are bigger and are slightly better for enthusiast-level overclocking. If, however, you just need a motherboard for one video card and won't be doing an extreme amount of OC'ing, then a...