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z170 OC Formula Event Viewer Error

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MikeGamerGuy View Drop Down
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    Posted: 12 Jan 2016 at 10:40am
I've got an event viewer error occuring on every boot, and it has been occuring since before I installed any graphics card.  The log shows it occured for the first time before I even typed my computer's name during the Windows 7 x64 install. and I don't know whether to ignore it or not.  No crash seems to be associated with it.

Background information.  I am RMA'ing a EVGA 980Ti FTW because it is faulty, crashing in Farcry 4 randomly (event viewer showing a TDR referencing nvlddmkm).  It also failed EVGA OC Scanner X's PhysX 3 Fluid GPU test with the the same file referenced saying the hardware was not installed or the installation was corrupted.  My EVGA 970 FTW performs just fine, though I have not played games extensively with it installed in this system yet.

I've installed, uninstalled, and reinstalled all the latest drivers a couple of times now.  At the behest of Asrock tech support, and against my instincts, I stuck the driver CD in and let it install whatever it wanted.  I then went about reinstalling all the latest drivers manually after that didn't resolve the event viewer error.  I've run passmark's Memtest 86 in UEFI mode and passed all tests.  I've run Folding at Home for hours and hours and the system is stable, with only a couple "true" early_unit_end's occuring for the same project number 10xxx on the CPU slot with the core status 72 (114). After investigating that, they could just be normal since there were no machine instability messages.  Prime 95 is stable, but I haven't run a marathon of tests with it yet.  Temps are good.  That concludes the backstory. :)


CPU: Intel Core i7-6700K 8M  ($420 - Custom)
Motherboard: ASRock Z170 OC Formula  ($238 - Custom)
Memory: CORSAIR 16GB (2 x 8GB) Vengeance LPX  ($125 - Custom)
Video Card: EVGA GeForce GTX 980 Ti 06G-P4-4996-KR  ($640 - Custom)
Power Supply: EVGA 850W 220-G2-0850-XR  ($110 - Custom)
Storage: WD 1TB BLACK SERIES WD1003FZEX  ($75 - Custom)
Storage #2: SAMSUNG 500GB 850 EVO MZ-75E500B/AM  ($155 - Custom)
CPU Cooler: Noctua NH-D15  ($90 - Custom)
Optical Drive: ASUS DRW-24B1ST/BLK/B/AS  ($20.38 - Custom)
Total: $2,108.38
Price may include shipping, rebates, promotions, and tax
Generated by PC Hound

TLDR: This event viewer error occurs every time the system boots:

Event 56, Application Popup
Driver ACPI returned invalid ID for a child device (5).

No crashes seem to be associated with this error. Ignore or keep investigating?
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MikeGamerGuy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeGamerGuy Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 3:00pm
Asrock tech support told me to exchange the board since the driver CD didn't fix it.  Not sure if something was lost in translation when I was trying to explain things or not.  Since I literally have no idea what child device (5) means, I'm just going to unhook everything I can from the MB and see if it goes away.  Then I'll install windows on a different ssd and see if it goes away.  I've already started the RMA with newegg though.
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wardog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 4:44pm
Mike, when you installed the drivers for the board did you d/l ALL of the latest from the boards ASRock page or did you use the included Support CD?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 4:49pm
Also, more importantly, is your board running the latest NON-Beta BIOS release?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 5:10pm
Originally posted by wardog wardog wrote:

Also, more importantly, is your board running the latest NON-Beta BIOS release?


In doing some Googling, it appears that when you update your BIOS doing so should fix this:
See Dean_peps reply of OCT 10 2015, where he posts a response from ASUS he received
http://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings/windows-10-event-id-56/aed11fed-4475-4a9a-ad87-4320200dc160?page=4
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeGamerGuy Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 5:41pm
Latest bios.  Just did a clean reinstall of windows 7.  The error still popped up.  I've tried it both ways now.  The first time I installed all the latest drivers from asrock's download site.  Tech support had me run the support disk on top of that. I reinstalled windows tonight and just ran the support disk and the same thing occurred.  I'm installing windows on different SSD now to rule out the SSD.   I've built a few systems before this one.  This one has been days of, you know, tediousness.  My video card was definitely bad.  The motherboard came with an invalid MAC address.  I should have just sent it back then instead of fixing it, but then I wouldn't have found out the 980ti was bad until later.  So far I've managed to unplug or swap out everything connected to the motherboard other than the CPU.  If this install is bad I guess I'll just chalk it all up to horrible luck. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wardog Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 6:28pm
For what you've dealt with there, heck yea, return it.

Do you have any !'s in Device Manager by chance? Like a missing ACPI driver? If you do, PM me and I'll direct you if you don't have an idea what I'm discussing.


BRB in about an hour. Have to go and start Wifeys truck and shovel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeGamerGuy Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 6:53pm
No problems in device manager.  I'm giving up.  It's either the processor or the motherboard, or something like an unsupported feature that the asrock tech doesn't know about.  He told me to send it back so I'm gonna send it back, because if I don't, I know I'm going to regret it.  Thanks for trying guys.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 7:25pm
That error is fairly common with the GTX 9xx series and could stem from quite a few sources. The most common source is drivers followed by a defective GPU followed by power problems.

If it is driver related then performing a fresh install as you say you did should have corrected it, another option is to use DDU and uninstall from safe mode and try a few different driver versions and see if that clears the issue.

The error also occurs fairly frequently on factory overclocked GPUs that for one reason or another are not stable at their factory overclock. Loading MSI afterburner and dropping the clocks to stock or lower will clear the issue in a case like this. RMA the GPU if this works.

Another GPU fault is inadequate power getting to the GPU. There are 2 things you can try here:
1. Set "Power management mode" in Nvidia control panel to "prefer best performance" instead of "adaptive". This has corrected the issue for many users.
2. If that still does not work then use MSI Afterburner and set "Power limit" to about 70% and test for TDRs. If this works then the issue is due to a power problem, either in the GPUs power system or the power going to the GPU is unstable or inadequate. Inadequate/unstable power could be caused either by an unstable PSU/poor connection or, an issue with the motherboard not providing enough power to the PCIe slot. Be sure you have both the 8 and 4 pin connectors on your motherboard connected and that they are properly seated. 

If after all this you still have the issue then sending back the board is the only remaining option.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MikeGamerGuy Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2016 at 8:35pm
It occurred initially without a graphics card even being installed.  All good tips though, thanks.

Edited by MikeGamerGuy - 12 Jan 2016 at 8:36pm
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