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Fried CPU core(s)

post #1 of 2
Thread Starter 
Hi,
i have been happily running with my 990x/G1 Sniper rig OC'd to 4.6GHz (1.48vcore) for 3+ years and one or more of my CPU cores went to silicon heaven.
RAM 24GB, PSU Corsair 1000HX, 690GTX, LSI 9265-8i controller wit 4x256GB SSD in Raid0 + (2x3TB + 2x128Gb SSD cachecade config).
(Don't worry about me running raid0 as I take daily backups with Acronis;; I'm only interested in speed, who needs safety belts...).

No direct faults or hint's that there is a faulty cpu core shows up in the mem dump.
Comp crashes with BSOD after max 3 minutes, even in safe mode, even with underclocking.
- Turning hyperthreading off does not help.
- Using BIOS default values does not help.
- Reinstalling OS does not work as cpu fault kicks in somewhere in the beginning or middle of that process. *
- * Meaning that booting with external USB-HDD is futile.
- Many threads with advice on BSOD 124 involving IDE/AHCI settings did not work (took most of my time since ppl were adamant that it was root cause).
- BSOD 124 shows up 9 out of 10 times.
- Random BSOD 34/3B/1/9C/7E/A.if not BSOD 124.

After wasting a lot of time fiddling with vcore , QPI/VTI, RAM and any thinkable parameter it finally struck me that "why not try running with 2 cores?"...
and there u go... comp runs, stumped but it runs.
Tried to run with 5 and 4 cores set in the BIOS but it did not work.
Running with 3 cores works which makes me believe that core 4 is the culprit and unknown state for cores 5 & 6 (they may be OK or not).
Problem in the Sniper BIOS is that it is not possible to select a specific core (4), only a parameter saying run with 1-5/all cores.
This would mean that if unlucky and core 1 should have been broken the comp would have had to go to the scrap heap.

Advice:
If you start to encounter a lot of BSOD 124's check out running with less cores and pray that core 1 is intact... avoid the RED HERRING hunt.
Warning: do not attempt to flash BIOS with the above symptoms or u risk to be very sorry indeed...

Hope this will help.

*edit: As long as u are in the BIOS configuration the comp does not crash, the crashes occur when u try to boot something like USB/CD/OS...
Edited by DoubleE460 - 10/15/13 at 1:34am
post #2 of 2
I'm sorry to hear about the death of a core or two. I also had dead cores in a 3770k. I also suffered BSOD's and strange green artifact blocks all over the desktop, followed by a hard lock!
Thank you for making a small guide to help others.
X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
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X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
  hide details  
Reply
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