11 beep code while booted. Help.

I recently changed my CPU/Mobo/RAM and since today (15th October 2012) Windows has started giving me these beep codes periodically. They seem random and the code consists of 11 beeps one after another. What could be the cause of this?
My system is:
Asrock 970 DE3/U3S3
Phenom II 965BE
2x4GB Corsair Vengeance @ 1600Mhz
1TB Hitachi 7200RPM HDD
Radeon HD6750
CoolerMaster Elite 460W PSU

I haven't installed anything, it just started randomly happening. I rebooted my PC and it stopped for about 2-3 hours, now it started again. I ran Prime 95 and the CPU temps were normal. 57 max with the stock cooler at 3.4Ghz.
Help is appreciated.