Need help with thermal calibration for PowerMac G5

Hi romko23

I am very new to this. So pardon me should I act in a very noob way.

I recently acquire a Power Mac G5 Quad (OSX 10.5.8) been using it for a while without any problem

except the initial RAM is a bit low (2GB) so feel a little sluggish. So I decided to upgrade the RAM to 10GB. The machine

then start to show some problem with what I thought to be overheat problem the 2nd LED near memory

banks lit up and the machine either go to sleep or ask me shutdown very often.

I include a pic below showing the normal temperature when I am doing almost nothing on it. The temp. can

easily shoot up to (especially 2nd CPU) 70-80 degree C before the symptoms I described above happen.

The fan is also incredibly loud.

Is it possible that I may need to do a thermal calibration. Or if the seating or heat paste (does this model have something like this) that couple the CPU to the heatsink worn off/disintegrate is needed to be redone?

Either way, I heard that to carry out these steps I will eventually need the ASD software. Can you help?

Thanks in advance, Utane

Hi, & a warm welcome....

Those temps are cgeat actully, no problem there! 🙂

More rRAM will likely help a bit.

See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...

http://support.apple.com/kb/PH7029

Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?

How much RAM & free Disk space do you have also, click on the Memory & Disk Usage Tabs.

Open Console in Utilities & see if there are any clues or repeating messages when this happens.

In the Memory tab of Activity Monitor, are there a lot of Pageouts?

Thanks for your reply.

I did all the checks you suggested and found them all to be ok. I just upgrade to RAM to 10GB so

no problem there. The Pageouts stays zero, no unusual high CPU or disk activity and no S.M.A.R.T error either.

I notice the temperature of the 2 cores of CPU B are always 10-20 degree C higher than CPU A, in fact if I look at the history from the past 5 days (that's when I install the temperaturemonitor software), the maximum temperature did spiked up to 80-86 degree C. And that's what I suspected causing the freezed up and forced shutdown which lit up the 2nd and 7th LEDs just before it happened. After some research on this site I saw lots of people with G5 Quad reported the LCS module for the CPU B failed causing the overheating. I still need to open up my heatsink cover and do some checking, maybe try swapping processor card as many people did and perhaps re-applying of thermal paste for CPU B to see if it help to bring the temperature down a bit.

Do you know if there is any link to G5 Quad CPU heatsink removal+re-seating howto?

Ah, yes, you need to likely replace the Thermal paste on thr CPUs and flush/rebuuild the LCS...

http://www.xlr8yourmac.com/systems/G5_CoolantLeak_Repair/G5_CoolantLeak_Repair.h tml

http://www.xlr8yourmac.com/systems/G5_coolant_leaks.html

Thanks BDAqua,

finally had a look under heatsink cover, no leakage. I will check/re-apply thermal paste this weekend and see how it goes.

Hopefully, it's not the well-documentd gunk blocking my pipe.

Cheers,

Utane

OK, please let us know the outcome! 🙂

Hi buddy ! I have an old power mac g5 dual 2.7 ghz early 2005 ! Im replacing the processors !! So i have to do a thermal callibration but i dont have the software !! I think i need the asd 2.5.8 maybe u can help me w that ?

Hi, i have a power mac G5 late 2004 and i just replaced W/LCS but still have my old processors due to old leaking water blocks. What i need to know is do i need to run a thermal calibration if yes can somebody plz help me by telling me where i can get the softwaire.

Hi, i have a power mac G5 late 2004 and i just replaced W/LCS but still have my old processors due to old leaking water blocks. What i need to know is do i need to run a thermal calibration if yes can somebody plz help me by telling me where i can get the softwaire.

If you go back and read my post and LordZedd posted on Nov 15, you will find out you can't.

Allan

If you go back and read my post and LordZedd posted on Nov 15, you will find out you can't.

Allan

Nice to see you again, romko, especially with the good news. 🙂

Check out mt post re my current woes with my G5-Quad. 😝

PPC G5-Quad panic kernel woes

For those who need help with the Calibration. I am in Ukraine right now, so I can access my machine from far away if anyone needs help.

Please all pray for us, its bad here.

romko23 wrote:

…Please all pray for us, its bad here.

Sending you best vibes from here, Romko.

greetings romko! thank you so much for helping where apple has left us stranded! please, if possible, send me the diagnostic and thermal software. please, email me at cyberdharma@hushmail.com Many Thanks and Peace and Solidarity for Ukraine!