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i7 4790k locked at 800MHz

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  • Asus
  • BIOS
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  • Intel i7
  • CPUs
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July 24, 2014 2:15:14 PM

I just built my new PC with i7 4790k in a Asus Z97-Pro. Inside the BIOS the frequency is set at constant 800MHz. When I adjusted it the TPU switch on the board it went to 1000Mhz. How do I change the clock to 4GHz?

More about : 4790k locked 800mhz

July 24, 2014 2:17:26 PM

I never messed with anything on mine, but when I play games or do something intensive, it goes to 4ghz and sometimes to 4.2
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July 24, 2014 2:22:30 PM

It stays at 800MHz no matter what application is running.
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July 24, 2014 3:33:48 PM

For one, your vcore is a bit high. Aside of that, maybe do a bios update to ensure the cpu is supported. What mainboard do you have?
You could also set the minimum clock to 4.0 ghz.
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July 24, 2014 4:17:27 PM

I have the latest bios. The mainboard is Asus Z97-PRO(Wi-Fi ac). I don't see any options for changing the minimum clock. Is this issue concurrent with a faulty mainboard?
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July 25, 2014 12:52:36 AM

I wouldn't call it on the mainboard yet. In the screenshot you posted there are "max cpu speed" and "min cpu speed". Set the min value to 4ghz and see if it works. That would afterall be kind of a power waste but good to see if cpu/mobo can even handle the speed.
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July 25, 2014 2:11:46 AM

Check your CPU temperatures from the monitoring page, incase its throttling due to a heat problem.
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July 25, 2014 10:15:45 AM

I don't see an option for setting the minimum value. Here is the temps under full load.
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July 25, 2014 10:20:54 AM

"Thermal Throttling: 100%"

I've never used this program, but I'm pretty sure that's not normal.

You did put the heatsink on the CPU, right?
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July 25, 2014 10:58:05 AM

This seems to be the issue, thermal trottling is supposed to be 0% all time.
It seems you didn't correctly mount the cooler on the cpu.

Oh and your DRAM voltage is too high aswell. 1.65 max.!
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July 25, 2014 4:25:05 PM

I took the H110 off and put it back on. Did the same thing. I put the stock cooler that came with the cpu on and it still does the same thing.
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July 26, 2014 2:09:19 AM

hissle said:
I took the H110 off and put it back on. Did the same thing. I put the stock cooler that came with the cpu on and it still does the same thing.


Erm, I suppose you carefully cleaned off all old thermal paste and then applied new?
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August 11, 2014 6:11:34 PM

It was the motherboard. Just got the new one and its at 4000MHz.
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