computer not recongizing ram. Help plz
i just got a 512 sdram stick of ram for my sises computer along with the one already in there which is 128 sdram. I start it up and go to system info and it stays a 128 i know it can handle more because i had to take out another 128 stick to put in in there. so i tryied just using hte 512 stick and it didnt even start up what does this mean.