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Bad CPU on macbook pro 17 inch Unibody

D

dogster

macrumors member
Original poster
Jul 11, 2008
48
0
So today I was running the computer doing compressor in FCP and at 2:00pm
I noticed that the computer had slowed down almost by half. I did some more tests and called apple and they confirmed that I had a cpu failure on one core.
Its only a 5 days old . oh well back to the drawing board

Doug
 
dogster said:
So today I was running the computer doing compressor in FCP and at 2:00pm
I noticed that the computer had slowed down almost by half. I did some more tests and called apple and they confirmed that I had a cpu failure on one core.
Its only a 5 days old . oh well back to the drawing board

Doug
Click to expand...

are you going to get it replaced then?
 
yes advanced replacement

They are taking care of it now and this is my 3rd one !!:eek:

Doug
 
All you need is patience Doug. Who knows you'll be replaced with newer Unibody model? Haha.
 
Rly? A failed CPU these days is really a very, very rare thing. I'm curious what your other symptoms were. Not saying your wrong, I'm just interested at this point.
 
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Ｉ　ｄｏｎｔ　ｂｕｙ　ｔｈａｔ　ｙｏｕ　ｈａｄ　ａ　ｂａｄ　ｃｐｕ　２　ｔｉｍｅｓ　ｉｎ　ａ　ｒｏｗ！

Ｄｏｎｔ　ａｓｋ　ａｂｏｕｔ　ｔｈｅ　ｔｅｘｔ　ｓｔｙｌｅ　ｔｈａｔ　Ｉ＇ｍ　ｕｓｉｎｇ．．　Ｉ　ｈａｖｅ　ｎｏ　ｉｄｅａ　ｗｈａｔ　ｈａｐｐｅｎｅｄ．　　Ｉ＇ｍ　ｃｕｒｒｅｎｔｌｙ　ａｔ　ｗｏｒｋ　ｕｓｉｎｇ　ａｎ　ｅｍａｃｈｉｎｅｓ　ｆｏｒ　ｔｏｄａｙ　ａｎｄ　ｆｏｒ　ｓｏｍｅ　ｒｅａｓｏｎ　ｉｔ　ｌｏｏｋｓ　ｌｉｋｅ　ｔｈｉｓ．
 
Its more likely a stick of RAM fell out than having a broken core. Infact im not sure if what your describing is even possible, the computer wouldn't halve in speed just because one core is broken, it doesn't work like that.
 
kastenbrust said:
Its more likely a stick of RAM fell out than having a broken core. Infact im not sure if what your describing is even possible, the computer wouldn't halve in speed just because one core is broken, it doesn't work like that.
Click to expand...

That's what I was thinking. The computer wouldn't see it as "hey, one core is gone but lets run at half speed". I would think if the core really DID fail then, well, the CPU would just fail. I don't think CPU's have a middle ground, it either works or it doesn't. I'm pretty sure you can go all technical, but that's how I see it.
 
I don't think a core can fail unless its the 2nd Core. If the 1st Core fails, the entire CPU shutdown. The 2nd Core can be "turned off" but the 1st cannot.

If your CPU has failed, it should report that there is only 1 CPU available and the 2nd core would either be: Not detected or report 0% in usage.
 
ok heres what I know

Well the computer has slowed down by almost 45 % so I figured the front bus is bad or a faulty core I dont know its weird . But for instance I ran xbench 3 days ago and got a score of 160 now only 106. Also I noticed the graphic card is slower so its a whole slowdown the whole computer. Bad logic board ?


Doug
 
dogster said:
Well the computer has slowed down by almost 45 % so I figured the front bus is bad or a faulty core I dont know its weird . But for instance I ran xbench 3 days ago and got a score of 160 now only 106. Also I noticed the graphic card is slower so its a whole slowdown the whole computer. Bad logic board ?


Doug
Click to expand...

Have you tried resetting the SMC and restarting the computer?
 
one more thing

The core could be still ok but maybe the voltage is messed up I dont know . They told me they r interested in testing it out
Apple that is


Doug
 
here is a reading showing only CPU A

look at this screen shot
 

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my bad

I didnt realize that there is only CPU A must be really tired

lol
 
Okay, I think you're getting confused.

CPU A = CPU Diode

There is only ONE CPU Diode in the entire system. The Diode contains 2 Cores within sharing a 6MB L2 (or 3MB L2 depend on what CPU you're using) Cache shared between both Cores.

Tell us, what tests you have run to determine your CPU is actually "broken". Look into "Activity Monitor" in /Utilities and see if it shows both CPU running any usage (anything above 1%).
 
I think the OP has no idea what he's talking about. He probably exchanged it due to some minor issue or it was all in his mind. Probably ran xbench score while running fcp or something~

If a CPU is broken the whole CPU doesnt work. There is no half functions unless the CPU shuts down the 2nd core as a feature.
 
jjahshik32 said:
I think the OP has no idea what he's talking about. He probably exchanged it due to some minor issue or it was all in his mind. Probably ran xbench score while running fcp or something~

If a CPU is broken the whole CPU doesnt work. There is no half functions unless the CPU shuts down the 2nd core as a feature.
Click to expand...

You can shut down the 2nd core easily using a preference pane. However, this is not the case here.
 
i do know what i am talking about

I am not running any programs and the computer is
about half speed . Activity monitor shows no programs
running in the backround. Where I agree now its not the cpu but something is slowing it down, front bus is damaged , logic board etc (Idont know and neither do you). Maybe the ram went bad ? Its very strange

Doug T
 
dogster said:
I am not running any programs and the computer is
about half speed . Activity monitor shows no programs
running in the backround. Where I agree now its not the cpu but something is slowing it down, front bus is damaged , logic board etc (Idont know and neither do you). Maybe the ram went bad ? Its very strange

Doug T
Click to expand...

Okay for one thing, FSB cannot be damaged and still have the system running. The CPU is made with such small parts that if any damage occurs there would be a complete short in which the entire CPU gets shot and fails. It won't fail in segments, almost impossible to fail in segments.

Furthermore, Front Side Bus is located within the CPU, not on the logic board. The logic board shouldn't have any failures or issues or you'll see it via hardware not working, not a slow down. A ram failure, if inserted properly would cause kernel panics. If ram somehow popped out of its slot, it would not create any kernel panics but slow the system down due to lack of ram.

Now I have suggested many areas on which you can test easily, yet you ignored all of them and continue to state its a hardware issue that makes absolutely no sense.

ayeying said:
Tell us, what tests you have run to determine your CPU is actually "broken". Look into "Activity Monitor" in /Utilities and see if it shows both CPU running any usage (anything above 1%).
Click to expand...

ayeying said:
Have you tried resetting the SMC and restarting the computer?
Click to expand...

Furthermore, we asked you for more information to help you, yet you ignored them also.

RX64MACBOOKPRO said:
how did it fail? any error messages?
Click to expand...

iLog.Genius said:
I'm interested as well. How do you know a core failed? What are the symptoms?
Click to expand...

And please, do not state "Just because its slow" because there are many software causes for that also.
 
ayeying said:
Now I have suggested many areas on which
Furthermore, we asked you for more information to help you, yet you ignored them also.
Click to expand...

Maybe he's just a troll. Dell fanboy trying to stir things up in these threads~

Hey its just another thought. :D
 
I don't know if you want to do this or not, have you tried running in a new user to see if the slowdown is still present? Maybe even do an Archive/Install. The only thing I think could be affecting your performance is bad RAM. Doubt it's any other hardware problem. Did you run the Apple Hardware Test just to see if anything comes up?
 
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