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初代Mac ProはIntel Xeonをベースにしたワークステーションコンピューターです。初代モデルには2006年から2008年のデバイスも含まれます。

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Mac Pro 1,1 dead after processor upgrade

Today, I swapped my old Xeon 5150 processors for a pair of Intel Xeon X5355. Everything went well, had a bit of trouble getting some parts out, but nothing serious.

After I reassembled the machine, it failed at giving any lifesign. Not even an LED lighting up. AFAIK, this is a sign of a failing PSU. Any other defectuous part should at least have some LEDs light up, fans start up, etc. At least, that's what I believe. But how could the PSU break from changing the processors?

Could it possibly be somenting else. Or just a big coincidence? I love my old Mac Pro and it would make me very sad to see it die.

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Your original machine should be the:

Apple Mac Pro "Quad Core" 2.66 (Original) 2006 Specs

Identifiers: Mac Pro - MA356LL/A - MacPro1,1* - A1186 - 2113

Your processor change would not do this. I'd go back over the connections to the power supply. You should at least be getting triple power even with a failed PSU.

Are you sure the new processor is not a 5365? I do not see where a 5355 was ever used in a MacPro.

I will be doing a similar upgrade in the next few day of a:

Apple Mac Pro "Quad Core" 2.8 (2008) Specs

Identifiers: Early 2008 - BTO/CTO - MacPro3,1 - A1186 - 2180

2.8 GHz Q. Core Xeon E5462

Going to:

Matching pair (2) Intel Xeon E5472 SLANR 3.0GHz

So I will watch for anything outstanding that I note.

BTW - Remember you will need the original system installation disk to do the fans syncing, or when you do get it running, you may have run away fans.

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Ah, well. After sleeping over it, I think I remember that the last time the machine shut down, which must have been a week back or so, I inadvertedly interrupted the main power from the outlet and went "oops!" when I noticed the Mac was still running. Forgot about it later on, but that had killed my previous machine's PSU, which was a blue/white Power Mac, one time already. It has been sitting under my desk like a sad memorial of bad maintenance since then.

So I suppose it was that case of huge coincidence and the machine was already dead when I operated on it.

As to the Xeon 5355, they're okay according to many reliable sources on the web.

I'm buying a new 1,1 now as the price of a single PSU is usually higher than that of a whole machine. Luckily, those run starting at around 100-130€ now, so it won't be that much of a disaster on my wallet.

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I got my new CPU's for $35. http://www.ebay.com/itm/321364581554?_tr...

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mathead さん、ありがとうございました！
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