Hi, Any help/advice on this would be appreciated. For some reason, when I am playing games on my PC they seem to crash back to my desktop and in some instances, reboot the PC totally. I've tried Mafia, Deus Ex, MOHAA and Championship Manager and they all crash. I'm thinking that some of my PC memory may have gone duff-do you agree or am I wrong and it could be something else? Thanks in advance for any help given Sorry, I forgot, I've got 2x256MB PC2100 DDR Ram modules in a P4 1.8 Ghz system.