Solved CStates Not Working in Bios

November 14, 2013 at 07:47:57
Specs: Windows 64
Hi I have a Biostar G41D3+ motherboard and for some reason the Intel C-States is not staying enabled after the OS is booted. Would someone be able to tell me what might be wrong. Thanks

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November 14, 2013 at 09:04:57
✔ Best Answer
The C-State settings in the BIOS are disabled by default. If you want them enabled, you need to do it manually & then save the changes. Do NOT select "Load Optimal Defaults". From your motherboard manual:

Intel(R) SpeedStep(tm) Tech
This item allows you to enable SpeedStep technology for better power saving. SpeedStep is a technology built into some Intel processors that allows the clock speed of the processor to be dynamically changed by software.
Options: Disabled (Default) / Enabled

Intel(R) C-STATE Tech
This item allows you to control the C-State power management functions of the processor.
Options: Disabled (Default) / Enabled

C1E Support
C1E is “Enhanced Halt State” function, this function helps to save power and decrease heat by lowering CPU frequency while the processor is not working.
Options: Disabled (Default) / Enabled

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November 14, 2013 at 09:29:22
Hi thanks for the response. If I enable the c-states and save the changes once the system boots to the operating system it gets disabled for some reason. Once I restart the system and enter the bios it shows that it is disabled and if I try enabling it again the same things happens. It gets disabled automatically.

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November 18, 2013 at 10:03:07
Try a BIOS update.

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November 18, 2013 at 13:35:35
If you loose date and time also, you will need to replace the 'coin' battery on the motherboard.

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