Kernel Panic After Dual 500mHz Upgrade!

[ddeadserious]

So I have a 450mHz single processor G4.

I bought a used, dual 500mHz processor off eBay - said to be in good working condition/tested.

I installed it in my Powermac - pretty straight forward.

It now give me a kernel panic upon anything past the grey apple logo.

I have tried resetting the PRAM to no avail.

It will boot into Open Firmware.

Here's a notable line that was recurring in the panic: unresolved kernel trap(cpu 1) alignment DAR

Any ideas? Thanks in advance!

 

[upsguy27]

So I have a 450mHz single processor G4.

I bought a used, dual 500mHz processor off eBay - said to be in good working condition/tested.

I installed it in my Powermac - pretty straight forward.

It now give me a kernel panic upon anything past the grey apple logo.

I have tried resetting the PRAM to no avail.

It will boot into Open Firmware.

Here's a notable line that was recurring in the panic: unresolved kernel trap(cpu 1) alignment DAR

Any ideas? Thanks in advance!

Look here: http://discussions.apple.com/thread.jspa?threadID=1562469 Is that the kind of message you're seeing? I'd say replace the processor with the old one (a pain to do) and if it works fine, the processor is the problem. BTW, Google is your friend.

 

[IroquoisPliskin]

Isn't that what happens when a dual CPU is put into the early PowerMacs not compatible with dual cards?

http://www.sonnettech.com/publicfiles/pdfs/pdf_onlinedocs/english/mac/encore_st_duet_2g_add.pdf

 

[ddeadserious]

Isn't that what happens when a dual CPU is put into the early PowerMacs not compatible with dual cards?

http://www.sonnettech.com/publicfiles/pdfs/pdf_onlinedocs/english/mac/encore_st_duet_2g_add.pdf

Thanks alot, that showed my machine being the "problem machine".

Bummer, guess I'll look for a faster single processor. Would have like to have known that before I bought the dual.

I appreciate it, seriously. Good to know the processor isn't bad - I was gonna be mad at the ebay guy I bought it off of.

 

[OrangeSVTguy]

Thanks alot, that showed my machine being the "problem machine".

Bummer, guess I'll look for a faster single processor. Would have like to have known that before I bought the dual.

I appreciate it, seriously. Good to know the processor isn't bad - I was gonna be mad at the ebay guy I bought it off of.

If you really want to and not costing a lot of money, buy a used motherboard from a dual model. You can find those for $10 and under + shipping.

 

[ddeadserious]

If you really want to and not costing a lot of money, buy a used motherboard from a dual model. You can find those for $10 and under + shipping.

Well this sounded like a great idea, so I did it. Got one for like $20 shipped off eBay.

Removed everything, installed the new MB and put everything back on except the power supply plug into the MB. Then I find that it doesn't fit.

The motherboard side of the plug is a 22-pin plug, whereas on my single processor MB and the accompanying power supply, it's a 20-pin plug.

Guess I'll be buying a new power supply.

Not mad at you at all, it was a great idea, just frustrated.