Not an error I've seen, but I would suspect hardware first. But just a guess.
If you are overclocking your cpu, try it at stock speed.
And run a test on your memory. Memtest86+ should be run for a few hours, most people just let it run overnight when they go to bed. You should see NO errors in memtest. http://www.memtest.org/
Windows memory diagnostic is another memory testing tool and is much faster: http://oca.microsoft.com/en/windiag.asp