2500K @ 1.6 GHz under full load

Hello!

I'm having a problem with my i5 2500K. I'm aware of the Intel Speedstep technology and the whole downclock while idle thing. However, my CPU doesn't ever go up to full speeds. It stays at 1.6 GHz even under 100 % load.

http://gyazo.com/bb8518c992b1e85e089ddaa48e712e81 Here you can see that I have Prime95 running with 100 % CPU load and CPU-Z still reports it being at 1.6 GHz.

My motherboard is ASUS Maximus IV Gene-Z and I recently upgraded the BIOS from 0403 to 0902. Not sure if this caused the problem since I didn't notice it until I started playing some games which wasn't until a while later. In BIOS I have the clock speed set to 4.6 GHz which worked perfectly fine until this problem arose.

Anyone got any clues on what to do?

 

Strange, I would go into BIOS and disable speedstep plus any power saving functions too, should be on the same page if not in the same block. Too bad I've already packed up my 2600K so I can't help you more there. I've had that one OC'd to 4.6GHz too with no discrepancies among various reporting apps.

 

Disabled Speedstep, still having the same problem. :/

 

nevermind

 

Oh wow, I was playing around with some settings in BIOS trying to find a solution. Suddenly, the CPU is at 4.6 GHz even at idle. With speedstep enabled.

Will go back to BIOS after school and look around some more.

 

Is your heatsink clean? Check the temps using coretemp.

If it gets too hot then your system sill throttle back the CPU to prevent damage. Given the board you have and the likely age of the system this seems unlikely.

Maybe try clearing the CMOS to revert back to factory defaults.

 

Alright, seems I have solved my problem. I can't precisely say what I did, but I know that I've changed a few settings. One of them is the C1E setting which I enabled instead of having it on auto. I'm quite sure this was the crucial setting, otherwise I'd be stuck @ 4.6 GHz 24/7.

Thanks for the help!