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Possible dead I7 5960X CPU, pls confirm

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30 Nov 2016
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141
Yesterday I had to reboot my main PC after a windows update, except it never rebooted, repeated attempts, nothing, had a look at the diagnostic motherboard LED after a while of other basic trouble shooting, code 00, had read about this before somewhere and knew it was potentially serious as my later in the day research showed, more on that in a bit.

So after pulling all USB stuff, SATA drives, swapping ram around and just one module ETC with still no luck, comforted myself with the fact I had a second X99 platform rig and compatible CPU to test and diagnostic swap with.

Power supply's in both rigs are high quality and both fairly new of course.

My main rig had (past tense now) an Intel I7 5960X eight core CPU, the second one a six core I7 5820K six core, put the 5960 CPU into my second rig, it never booted with a 00 error code on its motherboard LED too, but to be sure, put the I7 5820K into my main rig and it all booted up fine, conclusion, the I7 5960X is faulty, agreed?

Tried reseating as well and of course ensuring the ATX PSU power supply plug was seating properly, it was, no motherboard CPU socket bent pins, the actual CPU has none, they are little pads these days, so impossible to physically damage.

Lots more research on the 00 error code shows pretty much conclusively its either the CPU or motherboard, or possibly PSU CPU power connector related or even CPU seated related and its definitely not that, so my expensive eight core I7 5960X has died, that's still a £1000'sh CPU and along with my recent Titan X Pascal purchase made my Flight sim rig the beast I enjoy playing my simulations on :( Thank you black Friday, lol.

Oh well, so I can still claim on the 5960X CPU under warranty it seems, its a full retail CPU, so warranty is for three years, don't have my receipt to hand, but bought it around 2.5 years ago (ish) when the CPU's first came out, will dig out my receipt tomorrow with a view to getting a warranty replacement first thing Monday morning.

I'm thinking (I live in the UK) after one year, skip the retailer who were the main competitor to here and are apparently bad for warranty stuff in this instance and go direct to Intel for the extended three year warranty support, have read Intel are quite good about this with fast turn around too, even in Europe? not sure of the procedure, but will look at this over the weekend, any pointers anyone who might have done this before, please?

So, that's my first question, 99.99% sure the 5960X CPU is dead, though second opinions are most welcome.

Second part of my dilemma, with the 5820K in my main rig and working, it only worked for about 2 hours before Windows 10 64 threw a hissy fit, started to get Windows errors, like ...

Stop Code: critical process died, then reboot

Stop Code: Memory Managment, then reboot

Stop Code: kmod exception not handled ntfs.sys, then reboot

Stop Code: system service exception, then reboot.

I'm fairly confident this is because Windows 10 was installed (legit OS BTW) with the I7 5960X installed, and although the I7 5820K is same CPU architecture (Haswell E) its still a very different CPU, but with eight cores vs six and also importantly different size of L2 CPU cache, the 5960X has 20MB cache and the 5820K has 15MB cache, this would certainly explain those errors I've been getting, IMHO, but second opinions welcome on this too please.

I feel very confident that if I were to format and install Win 10 again on my main rig with the temp situation of the I7 5820K CPU in, all would be good, but with the likely and legit claim on warranty of my failed 5960X CPU being successful with Intel, that should replacement should drop back in again and those errors should stop ... hopefully.

Again, second opinions welcome.
 
If neither system boots then the 5960x is dead.. Get an rma

It may be that the faulty cpu messed up windows before it died.
Changing cpu won't mess up windows in itself.
I would reinstall Windows and see if that helps, it's unlikely you have two faulty parts but you might as well rule it out.
 
Contact the retailer first for RMA. Sometimes manufacturers want faulty products to be sent abroad at a high cost. Or contact both and see who offers better service.

I would probably RMA the board too. Especially with all the errors you are getting - I swapped sandy and ivy chips fairly frequently without any issues. Plus it's not usually the CPU that kills itself but rather the mobo overvolting in some way. So to be safe I'd also put he 5820K back in it's original system to be safe.
 
Don't bother with the retailer with Intel cpu's . i had to rma a 6800k , they asked me a few simple questions , issued me with an rma number, posted it off and 4 days later a brand new boxed cpu arrived. no fuss no hassles , easily the best customer service I've encountered.

With the 5820k that's not normal at all for windows to do this. Id bet money that the motherboard is the route of the issues. (however I wouldn't volunteer this info to intel customer support.)
 
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If neither system boots then the 5960x is dead.. Get an rma

It may be that the faulty cpu messed up windows before it died.
Changing cpu won't mess up windows in itself.
I would reinstall Windows and see if that helps, it's unlikely you have two faulty parts but you might as well rule it out.

This is my current thinking, hassle though it is I must do this too, will lose everything on that Flight sim PC time wise in installing everything again scenery wise,but if I formatted and all was good, then I'll know for sure.

Thanks.
 
Don't bother with the retailer with Intel cpu's . i had to rma a 6800k , they asked me a few simple questions , issued me with an rma number, posted it off and 4 days later a brand new boxed cpu arrived. no fuss no hassles , easily the best customer service I've encountered.

With the 5820k that's not normal at all for windows to do this. Id bet money that the motherboard is the route of the issues. (however I wouldn't volunteer this info to intel customer support.)

Thanks, its the first time I've seen this too, but never had this failure scenario either.

The 5960X CPU is dead, no doubt about it, never over-clocked it either.

Have parked the PC for now, it was an MSI X99A Xpower AC motherboard and was extremely reliable. from start to end of 5960X

I'll see what I hear from Intel on my probably 2.5 year old (ish) CPU warranty replacement but with three year warranty, if they replace it, I'll buy a new X99 board too for insurance, how does that sound?

Crap times really though, mega investment in PC parts I hoped would last years and its all went Boobs up!

Oh Well.

Hard to imagine a motherboard could fry a CPU though?
 
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Don't bother with the retailer with Intel cpu's . i had to rma a 6800k , they asked me a few simple questions , issued me with an rma number, posted it off and 4 days later a brand new boxed cpu arrived. no fuss no hassles , easily the best customer service I've encountered.

With the 5820k that's not normal at all for windows to do this. Id bet money that the motherboard is the route of the issues. (however I wouldn't volunteer this info to intel customer support.)

Advice taken on board, thanks.
 
OP make sure you have the latest bios on your motherboard.

Early bios for the Haswell E mobos/CPUs/DDR4 can be quite bad and can result in an unrunable mess.
 
Hopefully a silly question, but have you checked the underside of the 5960X? Just to make sure there are no marks, no dirt, etc?
 
Update, put a spare SSD in the PC with MSI board and the 5820K and tried to install Win10, it barely got to finish the install and then started throwing up same errors as in my first post, so motherboard must be faulty, hope it has not damaged the 5820K as well? I'll put it back in its own motherboard tomorrow to check.

Board was on the latest BIOS available.

Good to know MSI do a three year warranty, but I'll wait to see if Intel will replace the 5960X and then buy another brand of motherboard, thankfully X99 boards are still widely available, gone off MSI now :(

Thanks for all the help.
 
Guess a bit too late now.... My 5960x died on me yesterday and after going through a ton of hassle I managed to get it partially working.
In the bios I turned off all the cores bar one. After some tinkering I found out that the problem was core 2. Now i have a 7 core 5960x lol.
 
Thanks, its the first time I've seen this too, but never had this failure scenario either.

The 5960X CPU is dead, no doubt about it, never over-clocked it either.

Have parked the PC for now, it was an MSI X99A Xpower AC motherboard and was extremely reliable. from start to end of 5960X

I'll see what I hear from Intel on my probably 2.5 year old (ish) CPU warranty replacement but with three year warranty, if they replace it, I'll buy a new X99 board too for insurance, how does that sound?

Crap times really though, mega investment in PC parts I hoped would last years and its all went Boobs up!

Oh Well.

Hard to imagine a motherboard could fry a CPU though?
Ofcourse a mb can fry a cpu or there was an issue with the Cpu which got worse.

I have found that older microcode and bios are way better for Haswell E. Newer bios supporting BWE seem to have the most issues with the last gen cpu.
 
Ofcourse a mb can fry a cpu or there was an issue with the Cpu which got worse.

I have found that older microcode and bios are way better for Haswell E. Newer bios supporting BWE seem to have the most issues with the last gen cpu.

I'm running my 5960x @4.6 at 1.275v , memory at 3200mhz on a RVE10 with the latest bios , should i be worried as this boards bios had BWE support from the word go ? if anything my old 6800k always had stability issues with memory at 3200, and would fail to wake from sleep with BD error codes no matter what, i tried everything and spent hours tuning the sa voltage , since i bought the 5960x i've not had a single issue and can run xmp fine.
 
Edition 10 had bwe support from the beginning and has enhanced training so this board not effected with instability issues.

On ed10 just keep an eye on auto Sa settings as with several configurations they are set higher than needed.

Who the hell is using sleep.... Boot the board from cold to ensure lower mem timings are trained on each boot. Sleep on quad channel is a pain and asking for issues.
 
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Could it be the 3400Mhz RAM?
Unfortunately I am past the return period. However I built the PC around a month ago, so basically the CPU has been sitting in its box for years. The overclock was 4500MHz @1.255v. Up until 3 days ago everything was fine and absolutely no indication of degradation. The next day the PC crashed whilst booting into Windows. All kinds of errors including but not limited to:
1. Page fault in no page area
2 Memory_Management
3. Driver IRQ less than or equal

I tried to lower the voltage to 1.25 and all seemed to work fine for a while, however I than did the MISTAKE of setting all volages to Auto... on bootup overvoltage warning showing over 2 volts!! After that point back to manual yet degradation was fast and over a period of an hour CPU was seemingly dead. Spent the whole night trying different GPUs, SSDs and operating systems to no avail.

2 days ago I had a brainfart and started tinkering around with hyperthreading and switching off cores. With hyperthreading off I can get the system to work but not very stable, even at default settings.
Best solution is hyperthreading on with core 2 disabled. I can go up to 5 Ghz with no issues, but decided to stick to 4.5. It works rock solid. Yet not surprised if other cores start to fail in the future...

Morale of the story: Asus Sabertooth uses basic quality mosfets same as the ones on the Asus X99-A so you need to keep an eye out for the Vcore temps as they can run much higher than the CPU.
Never set a CPU clock multiplier without manually inserting reasonable voltages. Asus boards tend to boost these voltages
Last but not least, Yes, the mobo can kill your CPU

____________________________________________________________________________
5960x @4.5 | Asus Sabertooth X99 | Corsair H110i GTX cooler
32GB 3400Mhz LPX Corsair underclocked to 2666 (Not on QVL)
Single EVGA GTX 980ti
EVGA Supernova 850 PSU
2x 1TB Samsung EVO 840 SSD | Win 7
 
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