PC Random/sudden shutdown

[Jon97]

PC random shutdown and reboot all of a sudden with *no bosd while doing nothing (idle) or while browsing or watching YouTube on chrome. While gaming it does not have any issues, infect I can game 4 hours+ without any issues. It all happend few days after my yearly system clean and overclock tweeking, mainly increase core frequency from 4.5Ghz to 4.7Ghz and fine tune vcore by lowing offset voltage. But currently on stock settings but still sudden reboot. 

 

Sometimes it only happend once in a day but other time it can restart up to 5 times (like today it restated 7 times since afternoon). The restart can happend anywhere between hours to minutes after the last sudden reboot. 

 

Unable to provide system dump because there's no BOSD it's like someone turn off and on the main and quickly press the power button after that. 

 

By far the troubleshoot I have done

• Reinstall the driver that looks like it was the cause (Asus ai suite 2) - no luck
• Recheck cable connection - no luck
• Reseat CPU - no luck
• Change cmos battery - no luck
• *Change oc to defult - no luck
• *Check event viewer - no luck
• Memtest86 (3/4 pass (didn't run all) ) - no luck (all pass) 
• Stress test (real bench, AIDA, prime95 (max stress), furmark, haven) - no luck
• Monitoring voltage in windows (hwinfo, AIDA hwm+, open hwm, asus suite) - no luck all looks fine (even on stress test) 
• Monitoring voltage by molex using multimeter - no luck looks fine (even on stress test) 
• *Monitoring voltage through motherboard - no luck all looks fine
• Monitoring voltage through ROG connect - no luck all looks fine
• Check temps - all looks fine CPU @ max load 70°C at stock (@4.7ghz @76-80°C?), GPU @ 72°C

*Did a clear cmos and reapply my settings all the same. So I reset multiplier to auto and offset voltage (+) to AUTO (Basicly defult). But still the same reboot without any warning.

 

*Event viewer only show 3 errors

1. Error 1 audit events have been dropped by the transport. 0
2. Error 2 critical reboot, system has rebooted without shutting down first l
3. Error 3 the system has previously shutdown

*Motherboard voltage measurement through Asus ProbeIt measurement points

 

System spec

Motherboard: Asus Maximus IV Extreme Z

• Ya it's an old board but it's still gets the job done
• Latest BIOS
• Change this few setting
• Vcore load like calibration - 50%
• Vcore phase control - Optimized
• Vcore overload protection - 130%
• Voltage - offset (Defult - Manual)
• Dram settings (see ram)
• Second hand from my uncle and have been using since 2016 without any problem

 

CPU: 2600k (Noctua NH U12P dual fan) 

• 4.7Ghz @ 1.448v (max voltage on stress test)
• 4.5Ghz @ 1.4v
• Stock 3.8Ghz @ ~1.36v (current) (voltage auto) (CURRENT) 
• Previously it was fine running at 4.7Ghz with an offset of +0.75 but I lower it till +0.55 and no crash.
• CPU has been properly taken care of with no issues of high temp or throttling but it looks like there is CPU degration from age

 

RAM: 2 4GB DDR3 1333Mhz (Kingston), 2 4GB DDR3 1600Mhz (Crucial)

• 1333Mhz have been running since 2016/2017
• 1600Mhz added in Aug 2019
• RAM frequency has been lock in bios @1333mhz, timings auto, voltage 1.5v
• All 4 sticks of RAM has no issues

 

GPU: Asus strix GTX 1060 6gb

• GPU is overclock but I don't think that's the issue as it reboots when not on load

 

PSU: Silverstone Strider 600W fully modular PSU (ST60F-P) 

• Been using this PSU since 2014 and 2 system changes
• So far only 2 PCIe cable that was previously causing black screen (GPU crash) due to caps I think, but has been replaced with a spare cable and no problem ever since.

 

Sound card: Asus Xonar DGX

SSD: Crucial MX500 500GB

HDD: WD Blue 1TB

Windows: Windows 10 latest update (Last format was in December 2019) 

 

Note: My PC is connected to belkin power surge  strip since 2015? and has been using it almost everyday from almost morning till late at night or afternoon till late at night and no RGB.

 

Thinking of trying a spare PSU and see how it goes. Will update if problem still proceed.

 

Hope you get an idea of what is happening and hope this fan be solve without spending much money. 

[Dravinian]

This will likely be moved to the troubleshooting part of the forum, hopefully I will finish this post first.

 

Have you tried flashing the bios, you say latest version, but have you flashed it again recently?  I saw a video awhile back on a rebooting PC where eventually the bios itself fixed itself (gigabyte board) by finally realising it was corrupted....this was after like 20 or more reboots.

 

Admittedly, that was struggling to get into windows even, which is not the same as your issue, but perhaps worth a try.

[Jon97]

On 4/26/2020 at 6:59 AM, Dravinian said:

This will likely be moved to the troubleshooting part of the forum, hopefully I will finish this post first.

 

Have you tried flashing the bios, you say latest version, but have you flashed it again recently?  I saw a video awhile back on a rebooting PC where eventually the bios itself fixed itself (gigabyte board) by finally realising it was corrupted....this was after like 20 or more reboots.

 

Admittedly, that was struggling to get into windows even, which is not the same as your issue, but perhaps worth a try.

I reflash the BIOS and still the same random restart, so now i just replace the PSU with a spare one. Hopefully it's the PSU fault if not the next step is to reformat windows.