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Mac Pro not starting up after CPU upgrade

MacPro4me

macrumors newbie
Original poster
Jun 2, 2016
3
0
St. Paul, MN
Mac Pro has a single 2.8Ghz processor. When I installed a couple 3.2Ghz Xeon X5482 processors computer wouldn't start up. Just normal fan noise, but nothing on the screen after 10 minutes.

Reinstalled the 2.8 processor everything works fine.

What in tarnation am I doing wrong?
Do I have to reset the logic board or something?

Any ideas?

Dan

2008 Mac Pro 3,1
32GB ram
500GB SSD
Nvidia GeForce GT 730
 

scott.n

macrumors 6502
Dec 17, 2010
337
78
Mac Pro has a single 2.8Ghz processor. When I installed a couple 3.2Ghz Xeon X5482 processors computer wouldn't start up. Just normal fan noise, but nothing on the screen after 10 minutes.

Reinstalled the 2.8 processor everything works fine.

What in tarnation am I doing wrong?
Do I have to reset the logic board or something?

Any ideas?

Dan

2008 Mac Pro 3,1
32GB ram
500GB SSD
Nvidia GeForce GT 730
Do your X5482 processors have SLANZ or SLBBG stepping? Only the former will work in the Mac Pro.
 
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MacPro4me

macrumors newbie
Original poster
Jun 2, 2016
3
0
St. Paul, MN
Yep! They are the SLBBG. When ordering them I thought an x5482 was an X5482, and they would work in anything with a LGA771 socket.

Kind of confusing when someone is trying to sell them with both abbreviations.
http://tinyurl.com/zqcjzv7

Guess I'll have to try and sell these, get most of my money back and make sure I buy the correct ones.

Where did you discover they wouldn't work? Is this something everyone knows.......except me?

Didn't lookup what the two acronyms mean.

Dan
 

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scott.n

macrumors 6502
Dec 17, 2010
337
78
Yep! They are the SLBBG. When ordering them I thought an x5482 was an X5482, and they would work in anything with a LGA771 socket.

Kind of confusing when someone is trying to sell them with both abbreviations.
http://tinyurl.com/zqcjzv7

Guess I'll have to try and sell these, get most of my money back and make sure I buy the correct ones.

Where did you discover they wouldn't work? Is this something everyone knows.......except me?

Didn't lookup what the two acronyms mean.

Dan
There's a sticky at the top of this forum about processor upgrades that you might find helpful.
 
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MacPro4me

macrumors newbie
Original poster
Jun 2, 2016
3
0
St. Paul, MN
Okay, NOW I see. Thanks! I'll start hunting for the correct processors.
 

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