New CPU causing fan max rpm

[Stridenx]

Hello,

I have just recently upgraded my CPU from an intel i3 2120 to an intel i7 3770. since then,  my computer fan has been running at max speed, even when the CPU is idle.

I assume it is because of the temperature control in the bios was probably configured to the operating temperature of the  i3 2120 and is constantly trying to cool the new CPU which normally operates at the old CPU's max temp. If I am correct, is there a way to update or configure the bios so the fan accelerates when the fan is at a higher temp?

(I know this could be done on other bios by entering the proper key combination at startup, but I don't believe that my bios, hp K01 v02.99, has that feature)

Please let me know if there is anything that can be done to reduce my fan speed to accommodate the new CPU. It is usually left on all day so the loud fan is constantly bothering my wife and roommates.

Thank you!

[Grzwacz]

Hi

You are running on the new CPU. This is good.

Reset the BIOS to defaults.

This should let the system see the new CPU and adjust accordingly.

Tom

[Stridenx]

Thank you for the quick response, Grzwacz. 

unfortunately, after applying the defaults to the Bios there is no noticeable difference. the fan is still running like crazy.

[TragikzM8]

A few questions for you,   

1.  Is the CPU New or used? 

2.  Have you downloaded a program that lets you see the tempurature of your cpu to see what its running at?

Thanks 

[Stridenx]

the Cpu is used. a friend of mine upgraded his computer and gave me his old i7.

I have Coretemp which tells me the cup is running around 25 degrees C when idle.

[Hibb1]

Hi,

Did you clean the old thermal paste off the i7 & your heatsink and apply new thermal paste? Is the heatsink screwed down tightly? Have you updated the BIOS to the latest version (This will also update the CPU microcode, I believe)

Are you using the i3 heatsink/fan or the one that was originally on the i7?

Thanks, Michael.

[Stridenx]

Thanks for the response Micheal.

All the old thermal paste is gone and the new is on. The heatsink is on tight. When monitoring the CPU temp it is obvious that the CPU is cool. I have run it at full load with no over heating problems.

I just updated the bios yesterday. (From HP k01 v02.05 to hp k01 v02.99)

The fan and heat sink are the same ones as for i3, but as everything on the HP Compaq pro is proprietary the new fan and heatsink do not fit. The upgrade manual for my computer supports the switch to i7 and the cooling is working excellent. Yet the fan still spins at max rpm.

[Stridenx]

Fan is still running at max RPM when CPU is idle at 21 degrees C.

[Big_Dave]

Hi,

Recheck the CPU fan connector. It's a 4 wire connector and if it's not on properly or damaged then you might have speed regulation issues.

You can also try clearing the CMOS and see if that makes a difference.

You might try running the latest HP diagnostics and see if the diagnostics detect a problem.HP Hardware Diagnostics

I noticed that HP has posted another BIOS update for your PC.  I suggest that you hold off on this update as another post on this forum indicates a reboot problem.

[Stridenx]

Hey Big_Dave. Thank you for responding.

I checked the fan 4-pin plugin and nothing appears to be wrong with it. I plugged in another fan that I had lying around and it responded the same.

Cleared the CMOS. It was a good idea, but it didn't change anything unfortunately.

Ran all of the HP hardware diagnostics and the computer is pristine. Nothing appears to be wrong. I think I will get the Extensive hardware test to loop tonight and see if it comes up with anything new.

I updated the Bios to the latest over the weekend in hopes it would change something. No such luck.

Thank you again Big_Dave. Let me know if you have anymore ideas of things I could try.