Z420 bios keeps disabling turbo mode

[ScottishDave]

I have a couple of Z420 workstations, running  E5-1650 v1  xeon processor. Great machines, however:

On boot Turbo Mode is disabled. I want Turbo Mode to be Enabled.

In the BIOS:

I have PCIe performance mode set to disabled

I have CECP set to disabled

I set Turbo Mode to enabled

I save the setup, then reboot, go back into the BIOS and I see that Turbo Mode has been reset to disabled...frustrating.

My BIOS version is J61 v03.91

Any and all help appreciated.

[MtothaJ]

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@ScottishDave wrote:

I have a couple of Z420 workstations, running  E5-1650 v1  xeon processor. Great machines, however:

On boot Turbo Mode is disabled. I want Turbo Mode to be Enabled.

In the BIOS:

I have PCIe performance mode set to disabled

I have CECP set to disabled

I set Turbo Mode to enabled

I save the setup, then reboot, go back into the BIOS and I see that Turbo Mode has been reset to disabled...frustrating.

My BIOS version is J61 v03.91

Any and all help appreciated.

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Your settings are correct, perhaps try to reset the CMOS / remove battery and see if it starts saving the bios settings then.

[ScottishDave · Accepted solution]

The solution offered ( reset the CMOS ) did not fix the issue, HOWEVER, it got me to go back in once again into the BIOS and look at settings.

I have now resolved the issue.

Turbo Mode stays enabled if, in addition to:

PCIe performance mode to OFF

CECP to OFF

Turbo Mode: ON

I  ALSO set:

Runtime Power Managent to ENABLED

My Z420 is now happily enabling turbo when it needs it , my 3.2GHz processor happily goes up to 3.8GHz with 1 core heavily used and 3.5GHz with all six cores heavily used.