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Old June 10, 2011, 06:02 AM
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Default Asus P8Z68-V: What BIOS settings are enabled/disabled by TPU/EPU switch?

Asus P8Z68-V PRO

What BIOS settings are enabled/disabled by the physical TPU and EPU switches on the motherboard? The manual doesn't say.
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Old June 10, 2011, 06:14 AM
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TPU will OC your PC and EPU will down clock it
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Old June 10, 2011, 06:27 AM
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Originally Posted by Lanboy View Post
TPU will OC your PC and EPU will down clock it
I know, but what specific settings are changed in the BIOS?

Also, with the physical TPU and EPU switches OFF, can I still have access to enable said settings in the BIOS?

I'm trying to figure out if I have a bad motherboard, because even with the TPU switch OFF, the motherboard still tries to overclock when I "load optimized defaults" in the BIOS.
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Old June 10, 2011, 07:45 AM
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With opt defaults turbo is enabled so if it is just the multi going up by 1 or 2 it is turbo.
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Old June 10, 2011, 08:11 AM
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With opt defaults turbo is enabled so if it is just the multi going up by 1 or 2 it is turbo.
With optimized defaults and TPU/EPU off, I am getting BCLK = 104, turbo multiplier = 43. Same thing with TPU/EPU on. Is this normal?
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Old June 10, 2011, 08:14 AM
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OC Tuner is on. Clear cmos, load opt defaults, and you should be good. That or just keep the auto OC, it will be nice and stable with 2600k.
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Old June 10, 2011, 08:25 AM
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Originally Posted by Eldonko View Post
OC Tuner is on. Clear cmos, load opt defaults, and you should be good. That or just keep the auto OC, it will be nice and stable with 2600k.
How do I turn off OC Tuner? The only options I see in the BIOS are "OK" and "Cancel". When I select "OK", the system reboots several times (I assume it is checking to see the optimal overclock). When I select "Cancel", nothing happens.
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Old June 10, 2011, 08:27 AM
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You turn it off by clearing cmos and loading defaults.
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Old June 10, 2011, 08:36 AM
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Originally Posted by Eldonko View Post
You turn it off by clearing cmos and loading defaults.
I tried it but the same overclocked BCLK and turbo multi. values are getting loaded. I don't understand how OC Tuner is tied to the TPU/EPU switch. I thought disabling TPU should disable any OC'ing?
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Old June 10, 2011, 08:42 AM
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Unplug the PC and remove the battery and short the connector on the board for few sec. More than often I found that those Cmos reset button don’t do the expected job, especially with dual Bios
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