Disable thermal speed control on Intel CPU Fan?

[Chuster]

I need some help to disable the termal speed control on my stock Intel P4 CPU fan. The fan seems to vary in speed from 2676 rpm to 3413 rpm depending on the air temperature in the case, not the CPU temperature. I would like to run the fan at full speed all the time as I am getting CPU temperatures of 64 C (CPU overclocked to 2.88 GHZ at 1.725V) while the fan is only spinning at 2909 rpm. The system is stable but I suspect the CPU temperature would come down substantially if the fan would spin faster.

Can anybody help me? I'm not sure whether the fan speed control is actually in the fan (ie its a "smart fan") or on the motherboard.

I have a P4 2.4B (C1 stepping, SL6EF Malay) and a Gigabyte PE667 Ultra 2 mobo.

Any and all help would be appreciated.

 

[oldfart]

Welcome to Anandtech!

That is the way the HS/F is supposed to work. Speed varies based on ambient temp. 1.725 Vcore is a bit on the high side. Is that measured or BIOS setting? 1.7 measured is considered max safe Vcore by most here. If you are overclocking that far, with that much Vcore, you should be using an aftermarket HS/F. There is a way to modify the fan to run full speed, but I can't find the link. It will be noisy @ ~ 4000 rpm.

 

[Chuster]

Thanks for the welcome and for the reply, oldfart.

1.725V is the BIOS setting. Easytune 4, the Gigabyte overclocking / monitoring utility, is reporting 1.64V under load. The system will boot and do all the normal things stabily with a BIOS set voltage of 1.575V (1.52V reported) but Prime then craps out after 9 hours. I'm upping the voltage to see if I can run Prime stabily for 24 hours.

It would be great if I could get the link for the HS/F mod - I'm not too worried about the noise as the case fans are plenty loud already!

 

[ChampionAtTufshop]

what is vcore idle?
if its anything over 1.7v, then that cpu has a good chance of beingkilled soon
its either gate oxide breakdown, or electron migration, or a combo of both i think was waht the cause was attributed to