How to identify Dead Processor?

NiceCold

Senior member
May 14, 2011
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How to identify Dead Processor?

i heard something about if we take off the fan thats seating on top of the heatsink and turn the computer on then touch the heatsink and see if its hot... if its hot then it is good. if it is not hot then the processor is dead. is this correct? or take off the wole heatsink and touch the naked processor to se eif it shot or cold while powering up the computer?

not sure.
 

Plimogz

Senior member
Oct 3, 2009
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Sadly enough, I don't have a good answer to this. That being said...

processors heat up enough that just unplugging the fan and feeling the heatsink would let you know that the CPU is heating up without running the thing with no heatsink. And I've had CPUs which wouldn't work but would put out heat, so I don't know that this test really proves anything.
 

MagnusTheBrewer

IN MEMORIAM
Jun 19, 2004
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How to identify Dead Processor?

i heard something about if we take off the fan thats seating on top of the heatsink and turn the computer on then touch the heatsink and see if its hot... if its hot then it is good. if it is not hot then the processor is dead. is this correct? or take off the wole heatsink and touch the naked processor to se eif it shot or cold while powering up the computer?

not sure.

These are both bad ideas unless your intent IS to kill the CPU.
 

NiceCold

Senior member
May 14, 2011
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so theres no way to tell if a cpu is dead? i really want to know cause im trying to pin point why my computer wont work while everything is running but no beep sound and no screen on monitor.
 

Plimogz

Senior member
Oct 3, 2009
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why my computer wont work while everything is running but no beep sound and no screen on monitor.

CPUs are pretty much the most durable component in PCs. So unless you have a good reason to believe the CPU to be the cause, I would look elsewhere for your answer.

RAM? Bad BIOS flash? I dunno...
What were you doing before the thing stopped working?
 
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NiceCold

Senior member
May 14, 2011
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CPUs are pretty much the most durable component in PCs. So unless you have a good reason to believe the CPU to be the cause, I would look elsewhere for your answer.

RAM? Bad BIOS flash? I dunno...
What were you doing before the thing stopped working?

was playing pc games. shut down game for 5min. then shut down computer. then 10 hours turn computer on.... no beep, black screen.



it start happend a while ago... long long time..... everytime turn on computer.... it would have 40% of black screen while everything is running and 60% success boot up. now recently it dont boot up successfully at all!

its been 40% fail boot and 60% successful boot for like 9 months to 1 year. now finally it no beep black screne all the time.
 

thescreensavers

Diamond Member
Aug 3, 2005
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That smells like mobo to me.

I had that exact issue. Power button no video but everything in the computer case was on, do it enough times and it would finally turn on and stay on no issues 24/7 until it was turned off. I replaced/tested everything but the CPU and mobo and the cpu is now in another computer with out issue. Mobo was RMA'ed but they sent it back saying they replaced it what crap, I should of said something but I wasnt sure if that was the issue since when I plugged it all back in it worked. Until of course weeks later I turned it off lol.

It finally died and so I just started using my more powerful laptop lol
 
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fffblackmage

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Dec 28, 2007
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it start happend a while ago... long long time..... everytime turn on computer.... it would have 40% of black screen while everything is running and 60% success boot up. now recently it dont boot up successfully at all!

So the computer boots, except you have a blank screen? Are you sure it's not the video card?
 

NiceCold

Senior member
May 14, 2011
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no its not the video card. i took off video card while powering up and still same problem.


thescree you said you had same problem and turns out its the motherboard... i will keep that in mind. i might try geting a new cpu to put it in and see what happends.


anymore idea of what causing the no beep black screen?
 

SolMiester

Diamond Member
Dec 19, 2004
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no its not the video card. i took off video card while powering up and still same problem.


thescree you said you had same problem and turns out its the motherboard... i will keep that in mind. i might try geting a new cpu to put it in and see what happends.


anymore idea of what causing the no beep black screen?

I take it you mean you took the card out THEN powered up...however what did you use to send signal to monitor if you removed the video card?
 

Zap

Elite Member
Oct 13, 1999
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If you have narrowed it down to either the CPU or the motherboard and it is a fairly current platform (as in not Athlon XP or something ancient like that) then it is a 99% chance of a bad motherboard.
 

drizek

Golden Member
Jul 7, 2005
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I abused my Athlon XP to no end and it survived.

I once installed the heatsink backwards, so it was basically diagonal at the base and a millimeter or so above the CPU. I tried booting it up several times before I found the source of the random shutdowns.

And compared to other people, I was nice to mine: http://www.phys.ncku.edu.tw/~htsu/humor/fry_egg.html
 

Sunburn74

Diamond Member
Oct 5, 2009
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Actually just had this particular issue myself. Had a i7-875k running at 3.8ghz at 1.3v with LLC. It was stable for a long time. I decided to try prime95 as a stress test instead of just linx. Came home after a run and found the pc refusing to power up. Pulled the power cable form the PSU and discharged the capacitors by holding down the power switch on the case. After the 3rd or 4th try it booted.

CPU refused to run at 3.8ghz. After playing around was able to get it stable at 3.6ghz with alot of whining and electrical noise. I don't remember the inciting event but I got a BSOD and power cycling. Put the cpu at stock setting and it would be fine. I forget the inciting event again but another BSOD. Now cpu would boot but would freeze as soon as windows tried to boot up. Tried every trick in the book to get it to boot into windows. The only thing that worked was dropping the multiplier to like 18. The pc would boot into windows with perfectly normal functionality. However higher than 18 and it would lock up right after loading the raid drivers (keep in mind stock multiplier is like 23).

It was either the cpu or the board. I replaced them both with newer parts. My inkling is its the cpu that failed, maybe it overheated dunno (I have a thermalright ultra 120 and the temps were under 65 degrees, but who knows). I looked at the board and its pristine. Looks perfectly normal, nothing loose, nothing burnt. The fact that the only change that helped was progressively dropping the multiplier on the cpu leads me to think the cpu was the issue. Anyway, just thoughts.
 
Mar 11, 2004
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Actually just had this particular issue myself. Had a i7-875k running at 3.8ghz at 1.3v with LLC. It was stable for a long time. I decided to try prime95 as a stress test instead of just linx. Came home after a run and found the pc refusing to power up. Pulled the power cable form the PSU and discharged the capacitors by holding down the power switch on the case. After the 3rd or 4th try it booted.

CPU refused to run at 3.8ghz. After playing around was able to get it stable at 3.6ghz with alot of whining and electrical noise. I don't remember the inciting event but I got a BSOD and power cycling. Put the cpu at stock setting and it would be fine. I forget the inciting event again but another BSOD. Now cpu would boot but would freeze as soon as windows tried to boot up. Tried every trick in the book to get it to boot into windows. The only thing that worked was dropping the multiplier to like 18. The pc would boot into windows with perfectly normal functionality. However higher than 18 and it would lock up right after loading the raid drivers (keep in mind stock multiplier is like 23).

It was either the cpu or the board. I replaced them both with newer parts. My inkling is its the cpu that failed, maybe it overheated dunno (I have a thermalright ultra 120 and the temps were under 65 degrees, but who knows). I looked at the board and its pristine. Looks perfectly normal, nothing loose, nothing burnt. The fact that the only change that helped was progressively dropping the multiplier on the cpu leads me to think the cpu was the issue. Anyway, just thoughts.

That definitely sounds like the motherboard to me.
 

amenx

Diamond Member
Dec 17, 2004
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I wish every PC component was as durable as the CPU. No matter what issue I may have (outside of OC'ing), I will never suspect the CPU as a probable cause.
 

Sunburn74

Diamond Member
Oct 5, 2009
5,027
2,595
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Sounds like the motherboard VRMs or the PSU.

Psu is out of the picture. I replaced both the board and the cpu and kept the psu and everything has been great.

I thought about the board being the cause but again, it looked pristine, no bios issues were ever present, and when the multiplier was dropped to below stock, functionality was perfect. To be honest, it was the first chip I ever ran with LLC on and the first chip to fail on me. The start of all my trouble was running prime95. I strongly suspect overheating and cpu failure. I'm not saying it couldn't be the motherboard as I've had motherboards go out on me in the past. I'm just saying my money is on the cpu overheating during prime when I was away.

BTW, the board wasn't overclocked. The cpu was. 3.8 was reached by 133x29.
 
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