Dual 2ghz G5 Panther runs fans on High constantly.

Regarding the G5 fan issues in Panther.
To recap, I have a Dual 2 ghz system with PCI, 4 gigs max ram and a Radeon 9600 128mb. After unwrapping my G5 fresh from Apple's refurb lab I set it up and found that my Tiger partition seems to run fine, but the Panther partition, 10.3.3, runs the system fans on full blast. I would like to keep a mirror of my G4's 10.3.3 on the G5 until I sort out a bunch of things. The fact that this model G5 is supposed to support Panther is why I bought the refurb and not a new model.
I basically wanted a G5 that mirrored my current system, but faster. So anyway, I knew that the hardware worked because Tiger worked, so I upgraded the OS to 10.3.9 and the fans were fine. So the fix is a software issue. But do I need to jump to 10.3.9 to achieve it? Can I install a more specific software to address this issue?....Lets see...
I made another partition after a fresh cloning and using my 10.3.3 partition I installed just the extensions from the 10.3.9 combo update using Pacifist. This solved the fan problem. Granted, it whacked out the firewire which stopped recognizing my external drive, but I was just checking to see if the fix was in there separately somewhere... and it was. My only fear was that the fans were now not going to ramp up when it was warranted. What the **** do I know, but I think this proves, or at least suggests pretty strongly that the fan issue can be solved with an individual update. All I need to know is which elements from the 10.3.9, or even an earlier update, are needed to reliably solve the fan issue without hurting the system in some other way. I don't want to do anything to jinx the system so I'm returning it to it's normal state and then upgrading one level of the whole OS at a time to see where the fan fix kicks in. I've already tried 10.3.4 and that doesn't work. 10.3.5 is next. After I find the first OS upgrade that fixes the fan I will check all my software and see if I can live with it until everything is Tiger compatible... unless someone answers this question for me and then Panther is back to 10.3.3 with the fans fixed. As it should be. The only reason I'm obsessed with it is that the OS and my programs work fine, but the fan is driving me nuts...and I'm worried that letting it crank away on full blast like that would eventually wear them down. Any ideas? Would love to hear from someone at tech support? Thanks....

I think the G5 DP2 you have, with 4 RAM slots & PCI, is known as an 'Early 2005'.
From this list
http://docs.info.apple.com/article.html?artnum=25517
the build of OS X supplied with it was at least 10.4
Apple do not support running an earlier version of OS X than the build it shipped with
http://docs.info.apple.com/article.html?artnum=25497
Sometimes an earlier version works ok, often after an install from a "retail" copy of 10.3 - system discs from other Macs may have system-specific features.
This was discussed at great length when the G5s supplied with 10.4 were released. If you search on "10.3" last year, no doubt some of it is still around.
You could also try browsing/searching/posting in the 10.3 forums
http://discussions.apple.com/category.jspa?categoryID=161
Otherwise, I guess it's a case of trial and error.
Using the "combo" updaters may help alleviate some problems. No doubt you are repairing permissions, disconnecting peripherals (esp. firewire), etc, etc. Good Luck.

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