Mac Pro 1.1 upgrade: Fan noise issue

[Johs1983]

Hi everyone.

I have a Mac Pro 1.1 that I upgraded from 2x 2.66GHz dualcore processors to 2x Intel 5365 3 GHz quadcore processors. I flashed the firmware to Mac Pro 2.1 as well.

The problem is that the fans now run at full speed (2700 rpm and reporting constantky 128 degress Celcius from startup). And I have no control of the speed through SMC fan control either.

Any suggestions how to solve the issue?

-Johannes.

[dyttioaoa?]

Hi everyone.

I have a Mac Pro 1.1 that I upgraded from 2x 2.66GHz dualcore processors to 2x Intel 5365 3 GHz quadcore processors. I flashed the firmware to Mac Pro 2.1 as well.

The problem is that the fans now run at full speed (2700 rpm and reporting constantky 128 degress Celcius from startup). And I have no control of the speed through SMC fan control either.

Any suggestions how to solve the issue?

-Johannes.

My guess:

1. Either you damaged a thermal sensor.
2. Or you forgot to apply thermal paste, and or applied the wrong quantity.

A PRAM and SMC reset has already been done?

[Johs1983]

I just downloaded the iStat pro that can measure cpu tempereture and it says CPU A is 126 degrees C and CPU B is only 30 degrees (which I suppose is the normal temperature).

So it seems that something is wrong with CPU A... or that it is unable to measure the actual temperature for some reason!?

[Johs1983]

My guess:

1. Either you damaged a thermal sensor.
2. Or you forgot to apply thermal paste, and or applied the wrong quantity.

A PRAM and SMC reset has already been done?

Thanks for your reply. I did do both a PRAM and SMC reset.

1. How to check if the thermal sensor is damaged? Are they fragile?
2. I could have applied the wrong quantity thermal paste. I might have put too much?

Thank you.

[Johs1983]

BUMMER:

As I run through all the possibillities I actually discovered I forgot to plug in the temperature censor cable to to the logic board from the heatsink of CPU A :O Thats what happens. But anyway I learned a great deal through all the research and I also installed iStat pro which is nice to have. And thanks for your suggestions. My mac is running smoothly now with temperatures around 30-35 C on both CPU's... nice

[funinthemud]

I did the same thing to mine it sounded like a jet taking off, I read somwhere when you do this update it breaks the link to the fans so they run at full speed I than found this and use it on my mac
http://www.crystalidea.com/macs-fan-control