From: jason@slimes.ca   
      
   sizeofcat wrote:   
   > On 2025-10-31 10:20:04 +0000, sizeofcat said:   
   >   
   >> On 2025-10-31 09:59:52 +0000, Vela025 said:   
   >>   
   >>> On 30/10/2025 06:51, sizeofcat wrote:   
   >>>   
   >>>> I've mentioned it before, my main computers are those in the   
   >>>> signature, my main machine is a PowerPC iMac G5 (2004) and as a   
   >>>> laptop I use a PowerPC iBook G4 (2005), both running OS X 10.5.8.   
   >>>   
   >>> Ah another iMac G5 user. I've really been round the houses recently   
   >>> with different Linux distros. I'm now back to OSX Tiger, but last   
   >>> night downloaded Sorbet Leopard (again). The main reason I downgraded   
   >>> to Tiger was the fan was running at either medium or high almost all   
   >>> the time in Leopard and Sorbet (even with the tweaks) and it has a   
   >>> pretty loud whine...which is odd as when I read about G5 iMacs the   
   >>> consensus at the time was how quiet they are. I've cleaned out the   
   >>> fans and blown through the heatsink...does yours whine too? It's the   
   >>> early G5 (not the iSight or ALS).   
   >>   
   >>   
   >> You have exactly the same iMac as me (generation-wise, the 1st gen,   
   >> not the 2nd gen called ALS or 3rd gen called iSight), mine is 17 inch   
   >> (the smaller one). Well, I've removed everything including the   
   >> logicboard, repasted the CPU, GPU and U3 chip using Noctua thermal   
   >> paste, I've blown air through all the fans and checked if they work OK   
   >> considering those are 20-years old bearings, and the temperature is   
   >> exactly the same as before. It idles at 60degrees Celsius and goes to   
   >> 70degrees max in continued full load (I've compiled my Firefox fork in   
   >> one day and the temp stayed at 70 through all the ordeal). If your   
   >> temp goes over 70 you should consider replacing the thermal pads with   
   >> either new pads or thermal paste.   
   >>   
   >> As for being quiet, it's quiet until 65 degress and then the fans   
   >> start going hardcore (but not like a quad G5 PowerMac, obviously).   
   >> Thing is there will be very few things pushing mine to 70 degrees, and   
   >> that's mostly either Macports rebuilding GCC or CMake, or me   
   >> re-building my Firefox or Thunderbird forks. GCC 14 rebuild takes   
   >> about 3 days, CMake takes about one a half. Or Sims 2.   
   >>   
   >> Removing the logic board for the 1st gen is piece of cake, so   
   >> repasting the chips should be an easy job. But you need to remove the   
   >> logic board from the case first, because the U3 chip is on the bottom   
   >> side of the board, pressed against a copper sink and the thermal pad   
   >> was more like thermal gunk (completely destroyed, unlike the CPU and   
   >> GPU ones).   
   >>   
   >> Let me know if there is anything else I can help you with, I opened   
   >> mine a few times and it doesn't have any more secrets to me. I think I   
   >> have some inside photos somewhere, too.   
   >   
   >   
   > I've uploaded a front and back logicboard photo in case you've never see it.   
   >   
   > https://sizeof.cat/files/logic_board_front.jpg   
   > and   
   > https://sizeof.cat/files/logic_board_back.jpg   
   >   
   > The U3 chip is the one to the left, on the back side.   
   >   
   or you can go to the sites i mentioned...   
      
   ie.   
   tnkerdiferent.com   
      
   all the bes who work on this shit are there.   
      
   vids on who to do it.   
      
      
   buy a soldering iron..   
      
      
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)