Confirm the cpu program you are using to read the cpu is REAL TIME. Its possible you are looking at the clock speed of one core which is idle whilst the other is at full load due to not running prime on all cores.Ģ. Make sure prime is set to run 4 threads, and play around with different stress cycles (though prime is not likely to be the problem). Think of it this way, the cpu sits at 1.6 all the time when not in use (this is built into cpu management), then under load it will jump up to its native 3.4 ghz, then after it decides its under 'heavy' load it will kick into turbo mode and overclock all 4 phases to 3.8ghz.ġ. I understand that prime is supposedly stress testing the CPU but it seems like either theres a problem with the motherboard settings, or that the prime tests you are running are not triggering the fullspeed and turbo modes. The sandy bridge cpus will throttle themselves to 1600mhz when not under heavy load.
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