New fan screw up system 1

[EvilCabal]

Hi,

I have a ASUS P5AD2 Premium motherboard with an intel pentium 4 processor. I juste swaped the stock fan for a Zalman CPNS 7700-AlCu fan. I wore a anti-static bracelet during the whole process. Since the installation many strange stuff has happened :

1. The PC reboot without a reason from time to time, no error in the event logger
2. I sometimes get hard disk error when I boot, rebooting or unplugging and replugging the main drive usually solves this.
3. Sometime the PC won't boot at all. It gets stuck in the post for very long just after the ram test. Then after like 10 seconds it detects my 2 CD drive and then nothing...

I believe their is a problem either with the drive or the board? Any clue?

One last thing that is weird, the MoBo CPU fan connector has 4 pins while the Zalman fan only has 3.

Thanks
Fred

 

[kmcferrin]

I think that the pin difference might be part of it. Usually CPU fans will come with a 3/4 pin adapter so that you can use it with either. Your system may be having trouble monitoring the fan speed.

Alternatively, if the new fan isn't installed properly you could be having cooling problems. Is it mounted correctly so that it makes full contact with the CPU? Did you scrape off the old heatsink compound and replace it with fresh compound when you switched out fans? If the fan had a rubber-like thermal pad on the bottom of it you should not apply heatsink compound to it. If it didn't have the thermal pad, then you should.

 

[UnlimCompSol]

I have to agree with KM uptop. It sounds like your fan isnt seated properly or the heatsink isnt doing its job right.

Did you use a shim? I did one time and had a problem with it so I took it off.

It might also be since you are using 3 prongs that its not generating enough power to cool the processor down effeciently.

Malik

http://www.unlimitedcomputersolutions.com

where your problems are our solutions!!

 

[EvilCabal]

Thanks for the answers.

It is not a temperature problem, the fan is installed properly and I monitored heat to make sure it was ok.

I did not get a 3-4 pin adapter, I'll try to get one and see if it work.

 

[franklin97355]

Remove all your drives and see what happens. It could be your power supply if it not temperature.

 

[rvnguy]

EvilCabal,

The small four pin fan connector on the mobo is specifically designed and uses Pulse Width Modulation (PWM) for speed control.

Zalman's fan, as you have noticed, is a 3-pin connector. I could not find a 3-pin to 4-pin PWM converter. Note this is not a 4-pin molex connector as used for HD's.

The pin outs for the 4-pin PWM connector are quite different than the 3-pin.

I would contact Zalman with this question. As there are other mfg's that provide a HS/Fan with the 4-pin PWM wiring.



rvnguy
"I know everything..I just can't remember it all

 

[jfc1003]

The clue here is that the post stalls out while detecting IDE drives. This is classic bad hard drive, bad ide cable type stuff. I dont think the CPU overheating would cause problems at this level. You might want to try replacing the hard drive ide cable, maybe run a diagnosticssoftware downloaded from the hard drive manufacturer website. I think probably something was damaged or on the brink of failure when you opened the case and played with the fan. Look closely at cable connections and pins. The machine wont reboot simply because it can not detect the fan speed. You might get a post error warning you, but if the fan is spinning, and the bios hardware monitor shows good temp, you probably have other issues.

 

[EvilCabal]

I tried disconnecting the hard drives without success. Someone told me to completely disable fan control in the bios and things have been going fine since then but this might only be luck.

I would suprises me if this was what made the computer reboot but who knows...

Fred

 

[garebo]

One thing you can possibly do is to make sure s.m.a.r.t is enabled in your bios. If it is then it will tell you if a hard drive is not right or failing.
But i do believe its the fact that you have the 3 pin fan connector installed on a 4 pin connector.


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