i7 - 8700k Clock speed fluctuating constantly

[Im_Ben]

I have overclocked the 8700k to 4.8GHz on all cores, and the AVX is set to 3. The core speed fluctuates a lot when it's idle. However, when I play games, it goes to 4.8GHz. So what's happening?

 

Cpu under load:

 

 

Cpu when idle:

 

 

Cpu -z

[Lurick]

Intel Speedstep is on I believe which will adjust the frequency low or high depending on the load.

[Im_Ben]

Just now, Lurick said:

Intel Speedstep is on I believe which will adjust the frequency low or high depending on the load.

That is turned off. 

[Kilrah]

Then it's not obeying the setting / there might be a 2nd one.

[Lurick]

1 minute ago, Kilrah said:

Then it's not obeying the setting / there might be a 2nd one.

the other other thing I can think of is for OP to check power settings and make sure minimum processor state is set to 100%

[Im_Ben]

7 minutes ago, Kilrah said:

Then it's not obeying the setting / there might be a 2nd one.

If there's a 2nd one, I can't find it in the settings. 

[Im_Ben]

5 minutes ago, Lurick said:

the other other thing I can think of is for OP to check power settings and make sure minimum processor state is set to 100%

The power settings is set to high performance in the bios, if that's what you meant?

[Lurick]

Just now, Im_Ben said:

The power settings is set to high performance in the bios, if that's what you meant?

In Windows itself, under the Power Options > Change Plan Settings > Advanced Power Settings > Processor power management

[Stu_Bear]

Honestly if you are going with 4.8ghz...you are better off enabling MCE and turning up the clock to 102.9...setting AVX to zero....this gives you ~4.836ghz on all cores that run in perfect harmony...this is what I've done just cause my system runs so well at those settings.

[Im_Ben]

1 minute ago, Lurick said:

In Windows itself, under the Power Options > Change Plan Settings > Advanced Power Settings > Processor power management

That seems to have fixed it. Now it's at 4.6Ghz(ish) due to AVX offset.

Thanks for the help though!

[Im_Ben]

Just now, Stu_Bear said:

Honestly if you are going with 4.8ghz...you are better off enabling MCE and turning up the clock to 102.9...setting AVX to zero....this gives you ~4.836ghz on all cores that run in perfect harmony...this is what I've done just cause my system runs so well.

The problem is fixed now, but I'll try out your settings and see if those are better.