Eist, C1e etc - help needed.

[Jotunkaiser]

Hi, I was wondering - Ive read a lot that after you find your stable overclock to enable Eist/C1e etc but I notice in my bios (Abit ip35-pro) I have another 4 options that really seem to do the same sorta thing?

Eist function

Execute Disable Bit

Virtualisation Tech

C1e Function

Limit Cpuid Max val

Thermal Control.

I have a stable overclock now, which of these should be on/off? any help would be apreciated (Q6600) btw.

 

[dirtydog]

Do you mind if I join this thread as I have a similar question.

I used to be able to overclock my CPU (Q6600 also), and the power saving features would still be fully functional. It would reduce clock speed AND vcore when the CPU was idle, AND I could choose my own maximum vcore.

Now it doesn't work any more. It still reduces clock speed but not vcore, which means the CPU gets hot and stays hot even when idle.

If you set vcore to AUTO, it works, but a) it sets a stupidly and unnecessarily high vcore which means it gets hot anyway, and b) it sets the RAM voltage too low (it needs +0.2v) meaning I need to run my RAM slower or it is unstable (the occasional crash to desktop etc.)

I have various power saving options and they are all turned on. Is there some setting or combination of settings I need to get this to work properly?

These are the options I have, copied from my manual:

CPU Enhanced Halt (C1E) (Note)
Enables or disables Intel® CPU Enhanced Halt (C1E) function, a CPU power-saving function in
system halt state. When enabled, the CPU core frequency and voltage will be reduced during
system halt state to decrease power consumption. (Default: Enabled)

CPU Thermal Monitor 2 (TM2) (Note)
Enables or disables Intel® CPU Thermal Monitor (TM2) function, a CPU overheating protection
function. When enabled, the CPU core frequency and voltage will be reduced when the CPU is
overheated. (Default: Enabled)

CPU EIST Function (Note)
Enables or disables Enhanced Intel SpeedStep Technology (EIST). Depending on CPU loading,
Intel® EIST technology can dynamically and effectively lower the CPU voltage and core frequency
to decrease average power consumption and heat production. (Default: Enabled)