Even though I know that if the motherboard conforms to AMD keep- out -specs the MCX462+ should fit, my eyes tell me that there is no way that this nearly 1 1/2 lb hunk of metal is going to fit on my EPoX 8k3A. So I carefully sit it on top of my XP 2000+. To my surprise it fits fine. In fact the closest component to the MCX462+ is the Power Supply. That's when you appreciate how the bottom edges are machined for component clearance.