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Dougal

Just Fried My CPU :-( Need Advice Please

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Can't believe this - My i7 6700k died today:-(  No idea what caused it as the cooler seems fine.  Tested the CPU in another board and its definitely dead!  In all my years running Intel, this has never happened before.  It was overclocked, but only to 4.7MHz.

Question... Is there any point putting a Kabylake in instead of a direct Skylake replacement?

Anyone running a Kabylake in the Asus Z170 boards?  I assume they're compatible?

From what I've read so far, the differences are minimal, but thought I'd check it out on here.

Having to use an old PC.

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8 hours ago, Dougal said:

Can't believe this - My i7 6700k died today:-(  No idea what caused it as the cooler seems fine.  Tested the CPU in another board and its definitely dead!  In all my years running Intel, this has never happened before.  It was overclocked, but only to 4.7MHz.

Question... Is there any point putting a Kabylake in instead of a direct Skylake replacement?

Anyone running a Kabylake in the Asus Z170 boards?  I assume they're compatible?

From what I've read so far, the differences are minimal, but thought I'd check it out on here.

Having to use an old PC.

Sorry to hear that.

Kabylake are compatible with z170 mobos but i thing you need to update your bios

https://www.asus.com/us/Motherboards/Z170-A/HelpDesk_CPU/

If i where you i would buy the new 8700k, but you need a mobo change for sure!

Oh, and check your cooling system before putting another cpu there ;)

 

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2 hours ago, Greggy_D said:

Shouldn't your CPU be under warranty from Intel?

Does'nt overclocking generally kill any warranty?

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Mine also died at the same frequency.  I just called INTEL and they sent me a new processor.  They will say that you overclocked too much but will still approve a new one.  I bought a 7700k and have the 6700K in storage just in case something happens to this one also.

The replacement came with a new 3 year warranty so it turned out all good.  I limited my OC on the new 7700k to prevent this one from going bad also.

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15 hours ago, Dougal said:

Can't believe this - My i7 6700k died today:-(  No idea what caused it as the cooler seems fine.  Tested the CPU in another board and its definitely dead!  In all my years running Intel, this has never happened before.  It was overclocked, but only to 4.7MHz.

Question... Is there any point putting a Kabylake in instead of a direct Skylake replacement?

Anyone running a Kabylake in the Asus Z170 boards?  I assume they're compatible?

From what I've read so far, the differences are minimal, but thought I'd check it out on here.

Having to use an old PC.

 

Oh poo! Sorry to hear that. CPU death is relatively rare. Only launched in 2015, so you should be still under warranty. Let Intel know and they will send you a new one. What was the voltage by the way?

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2 hours ago, HiFlyer said:

Does'nt overclocking generally kill any warranty?

 

Intel's Performance Tuning Plan is available. It's overclocking insurance for a pretty cheap price. I usually get it if not delidding. 

 

Intel have no idea from the CPU if you were overclocking or not. Sounds like they still honour warranty's though according to Sean. 

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9 hours ago, dmarques69 said:

Oh, and check your cooling system before putting another cpu there

A good idea but unlikely to be the cause of the failure. Intel CPUs have a thermal sensor which shuts down the CPU in the event of a serious over temp to prevent damage. 

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It was the pump on the water cooler (Corsair), but I don't understand why the CPU didn't throttle back.  Maybe it did but still blew anyway. The PC was doing nothing apart from downloading a file from steam when it died. I had 'Adaptive Voltage' set in the BIOS. The std vcore was 1.296v and adaptive offset would allow it up to 1.345v.  Stepping was 'enabled' so it was probably running at no more than 1500MHz and probably less than 1.10v

The CPU was de-lidded about 6 months ago, so I very much doubt Intel will replace it.  Will they want it back to check;-)

NOT a happy bunny:-(

I'm broke too. so nothing happening for now;-(

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10 hours ago, somiller said:

Curious how long you've had the 6700k?

I think about 18-20 months only.

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Normal temps after the de-lidding were just fantastic.  When ambient temps were low, it would sometimes idle as low as 20c and never go above 68c when loaded.

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50 minutes ago, Dougal said:

The CPU was de-lidded about 6 months ago, so I very much doubt Intel will replace it.  Will they want it back to check;-)

You should try, maybe something changed, but a couple of years ago was ok "As long as the numbers on the IHS match with the number on the bottom of the chip PCB your in warranty".  http://www.overclock.net/t/1313179/official-delidded-club-guide/21390#post_20679427

Also, i would recommend you this next time:

https://click.intel.com/tuningplan/

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11 minutes ago, lodestar said:

You should try, maybe something changed, but a couple of years ago was ok "As long as the numbers on the IHS match with the number on the bottom of the chip PCB your in warranty".  http://www.overclock.net/t/1313179/official-delidded-club-guide/21390#post_20679427

Also, i would recommend you this next time:

https://click.intel.com/tuningplan/

Many thanks for the links - checking now...

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3 hours ago, vortex681 said:

A good idea but unlikely to be the cause of the failure. Intel CPUs have a thermal sensor which shuts down the CPU in the event of a serious over temp to prevent damage. 

I know that mate, and even before that the cpu throttle's down, but any cpu exposed to high temps for a long time can frie ;)

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3 hours ago, dmarques69 said:

I know that mate, and even before that the cpu throttle's down, but any cpu exposed to high temps for a long time can frie ;)

 

Theoretically, it wouldn't be exposed to a high temp for a long time though. It would throttle back and then shut down before damage ensures. That's how its designed. Clearly something has gone wrong in this case though. 

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Wouldn't be deliding in terms of temp. As it approached TJ Max it would still throttle and then shut down prior to damage. 

And damage to the die would be evident straight away, not months or years later.

Only thing I can think of, if it was AIO pump failure, is that perhaps the increase in temp was so rapid that there wasn't enough time for the thermal protection to kick in. Of course I may be talking nonesense

 

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3 hours ago, martin-w said:

Wouldn't be deliding in terms of temp. As it approached TJ Max it would still throttle and then shut down prior to damage. 

And damage to the die would be evident straight away, not months or years later.

Only thing I can think of, if it was AIO pump failure, is that perhaps the increase in temp was so rapid that there wasn't enough time for the thermal protection to kick in. Of course I may be talking nonesense

 

I'm still dumbfounded as to why there's no visible damage or deforming of the die.  If it was heat that killed it, it must've been pretty darn hot! Also, why oh why did the CPU not shut itself off before cooking?!  I'm guessing there was already something wrong with it before the water pump died.

That's another thing too...  It's the 1st EVER coolant pump failure I had of any make or model.

Apart from the fact I'm still breathing, and here to complain about it (as many here know, that in itself is pretty remarkable), I've had a bum run of luck with my PC network over the last couple of years;-)

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38 minutes ago, Dougal said:

I'm still dumbfounded as to why there's no visible damage or deforming of the die. 

 

There wouldn't be. Thermal damage is internal, not visible. 

 

Quote

 Also, why oh why did the CPU not shut itself off before cooking?!  I'm guessing there was already something wrong with it before the water pump died.

 

I speculated that maybe the heat build up was so fast that the thermal protection didn't have enough time to trip. This is nonsense though, it doesn't work that way. There are a number of thermal monitors built in that should very quickly deal with the issue. In addition, thermal convection within the loop would still cool to a degree, so no instant heat build up possible. The thermal protection should have no issues. 

Possibly there was a CPU issue prior and when the CPU overheated and attempted to shut itself down it was the straw that broke the camels back. 

 

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The CPU is dead, and the coolant pump is dead... has the motherboard been checked?  I'd be concerned that a rogue PSU could be responsible for all the damage.  Not convinced that the CPU and coolant pump dying at the same time is any kind of coincidence.

Good luck,

Greg

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21 hours ago, lownslo said:

The CPU is dead, and the coolant pump is dead... has the motherboard been checked?  I'd be concerned that a rogue PSU could be responsible for all the damage.  Not convinced that the CPU and coolant pump dying at the same time is any kind of coincidence.

Good luck,

Greg

Oh shite of course.  It should have, but that never crossed my mind.  Any way to properly test the PSU without running the risk of another mobo or CPU?  Actually, i think i've got an old system i can check it with.

I'm guessing though, that all i can really do is test all the rails for correct voltage?

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22 hours ago, lownslo said:

The CPU is dead, and the coolant pump is dead... has the motherboard been checked?  I'd be concerned that a rogue PSU could be responsible for all the damage.  Not convinced that the CPU and coolant pump dying at the same time is any kind of coincidence.

Good luck,

Greg

 

Very good point Greg. Have to say though, I've never heard of a PSU killing an AIO pump. 

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