i've had the same issues. Lockups like that generally happen due to bad memory or cpu issues. i've had perfectly cool cpu's that that were faulty. first thing i would do is try one RAM stick at a time in the first slot since the ram is much less of a pain than RMAing a processor -.-
good luck to you
edit-- didn't see your post. glad things seem okay. make sure everything's okay before the time is up for RMAing your processor, just in case.
good luck to you
edit-- didn't see your post. glad things seem okay. make sure everything's okay before the time is up for RMAing your processor, just in case.