Random reboots, WHEA-logger Event ID 18 and 20

Hello

I hope you guys can help me fix this. Sorry for the long story but I want you to know everything that happened.

So a couple of months ago I custom build a new pc. Everything went fine, no problems during the build and no problems installing all the programs I needed. Then after a about 3 weeks my pc rebooted without warning while playing a game. I had no idea what happened. After that it kept happening when I played games, sometime after hours of playing and sometimes within a minute. Then it started happening when I was browsing the internet or checking my mails...

I did some research and used prime95 to see if there was a problem with my cpu, I ran it for about 4 hours without any problems.
Next I tried testing my GPU (because it happened mostly while playing games). I used Furmark for about 3 hours, also without any problems.
Last I tested the RAM. I used memtest 86+ also for about 3 hours, and you guest it, without any problems.

I had no idea what was going on.
The holiday season started and I want home, took my pc with me. when i got home I opened him up and redid my cable management, so it wasn't all over the place. I installed my pc at home and fired it up. A day went by without reboots, that day became weeks... I thought the problem was fixed! (I thought : maybe there was a loose cable that caused the reboots)

I totally forgot about the problem since it never happened anymore. Then I got a corsair H60 for Christmas, I installed it and everything worked perfect. Silent and super cool. (idle around 6-10°C and under load around 35-40 °C) So I thought: With the cpu running so cool, maybe I can overclock it. So I did (using AMD Overdrive). I want form 3.9GHz to 4.2GHz and then I did a stability test. within 2 of the test the pc rebooted. The moment after I logged back in it rebooted again. This kept happening. So I want into the bios and set the speed and voltage back to normal. I logged in, made sure everything was beck to normal in AMD OverDrive and then uninstalled it! (this was last week)

Everything seemed to be working like normal. Until today, I was watching movie and all of the sodden it rebooted. I logged back in ans started the movie again, after about 30min it rebooted again. And it happend a 3rd time.

I did some more googling and I came across this forum. I hope someone here will be able to help me.


In the Event Viewer I find the same errors coming back every time i get a reboot :

WHEA-logger Event ID 18
A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Bus/Interconnect Error
Processor ID: 4

The details view of this entry contains further information.


WHEA-logger Event ID 20
A fatal hardware error has occurred.

Component: AMD Northbridge
Error Source: Machine Check Exception
Error Type: Sync Error
Processor ID: 0

The details view of this entry contains further information.

I also attached the minidups from today.

I really hope you can help me. Tell me if you need more information.

Hi bnt welcome to SF :).

Sudden restarts such as these are usually an electrical issue meaning the PSU
is the main culprit in this regard.
Just noting, your motherboard isn't really built for overclocking, your CPU's stock wattage is 125W
which is your motherboard's maximum rated capacity.
Have you done so for any prolonged amount of time?

What is the make, model and age of your PSU?
Fill out this form and post back the result:

• Power Supply Calculator

Now for the bugchecks they are a generic BUS error but the WHEA logger event somewhat helps
in narrowing it down a bit.

Code:

Error Type    : BUS error
Operation     : Generic

===============================================================================
Section 2     : x86/x64 MCA
-------------------------------------------------------------------------------
Descriptor    @ fffffa800736da08
Section       @ fffffa800736db90
Offset        : 664
Length        : 264
Flags         : 0x00000000
Severity      : Fatal

Error         : BUSLG_OBS_ERR_*_NOTIMEOUT_ERR (Proc 0 Bank 4)
  Status      : 0xba00001000020c0f

Code:

Event[3609]:
  Log Name: System
  Source: Microsoft-Windows-WHEA-Logger
  Date: 2013-10-27T17:58:02.439
  Event ID: 20
  Task: N/A
  Level: Error
  Opcode: Info
  Keyword: N/A
  User: S-1-5-19
  User Name: NT AUTHORITY\LOCAL SERVICE
  Computer: StijnB-PC
  Description: 
A fatal hardware error has occurred.

Component: AMD Northbridge
Error Source: Machine Check Exception
Error Type: Sync Error
Processor ID: 0

The details view of this entry contains further information.

Event[3610]:
  Log Name: System
  Source: Microsoft-Windows-WHEA-Logger
  Date: 2013-10-27T17:58:02.455
  Event ID: 18
  Task: N/A
  Level: Error
  Opcode: Info
  Keyword: N/A
  User: S-1-5-19
  User Name: NT AUTHORITY\LOCAL SERVICE
  Computer: StijnB-PC
  Description: 
A fatal hardware error has occurred.

Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Bus/Interconnect Error
Processor ID: 4

The details view of this entry contains further information.

The notation of the northbridge along with the consistent BUS error makes me think
about the GPU PCI-Express, try using the integrated graphics and assess the situation,
if it still reboots randomly look into trying a different PSU.

Let us know the results.

Hi :).

It might be a defective card, can you borrow one and use it for a couple of days?
Before considering a faulty PCI-e / motherboard?