Alright, my friend claims that his p4p800 motherboard cant use certain types of ram. at first I figured he meant physically, like amount of pins and such because thats same with all motherboards, but when he started saying p4p800's cant use patriot and like 6 other brands which are almost identical to what he has(ddr400, pc3200, 184) it didnt make sense. How could one brand name with identical physical properties be different.