Just thought I'd post an update on this whole misadventure:
NewerTech is full of it when they say this is plug and play... went through the installation procedure, which includes pulling the Apple CPU Plugins file from the 9.2.2 System Folder, reprogramming with their disk to set NVRAM and various patches for this particular card. I did it first in 10.3.9, and then started getting kernal panics. I was plugged into my ACARD PCI controller card, which I hadn't updated, so I thought it might be the culprit... But it did the same thing on the internal ATA Bus. So, I called OWC tech support, and they informed me that the instructions are a little fuzzy, and I needed to start the reprogramming booted in 9, and I had to re-install my original processor first to go through the process all over again. So, I did that, and the machine wouldn't boot. Powered up, wouldn't boot. Tried the PMU button, nothing. Tried to reset PRAM, and it wouldn't respond to the keyboard commands.
Re-installed the original processor, then decided just for yucks to try it all over again. This time, so far, it works... while I was booted in 9, I flashed a firmware upgrade on the ACARD, and have been running now without a kernal panic for a little while. I've probably put in a good 6-7 hours worth of work to get to this point... The ACARD ATA controller is quite a bit faster than the internal ATA 66 Bus, so I'm hoping that everything I've done is going to remain stable.
Plus, the fans that Newer uses are fairly noisy... but at least at this point, it looks like I've got a fairly fast working machine. The fate of the MDD is still undecided, but at least for the moment, I think things are going to be ok. I should find out if it's really the power supply (again) sometime early next week.
And oh yeah, that OS 9 Apple CPU Plugins file that needs to be removed? In order to run any disk utility program on this machine, you need to make a custom disk with that file removed, or your utility program disc won't boot... that ought to be fun trying to find that in Disk Warrior...
This is the 4th processor upgrade I've done on 3 different machines. None of them were ever plug and play, and this one really takes the cake. I'm really surprised that OWC would sell this with the verbiage in the product description. I'm going to talk to them next week about it; probably won't do any good, but you never know until you try.
So much fun, so little time.
But, I've been booted for about 45 minutes, no Kernal Panics, and it's very fast.
Chris K