I recently built a PC with an FX-8320 which is 8 cores and is supposed to be to 3.5GHz, but in both the Windows Task Manager and CPU-Z, even while running stress tests, my CPU won't go above 1.68GHz. I poked around in the BIOS to see if anything was limiting it, but there wasn't anything there. Any suggestions? Note: I've never overclocked or anything like that.