I have been looking at ram recently and I was going to buy xms3, but now the patriot viper ram has come down in price I'm thking of getting it instead.I was also having a look at Kingston HyperX the cheapest of 3 but does not include xmp. I have no idea how important xmp is, from what i have heard its just an automatic overclocking profile. I will be running 12gb of ram and I do plan to overclock. Thanks