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x99 Extreme 4 won't post / erratic behavior
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ualdriver View Drop Down
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    Posted: 12 Nov 2016 at 1:20pm
EVGA Supernova 750 G2 power supply
Intel I7 5820K
Samsung V NAND 950 Pro M.2
Ripjaws 4 DDR 4 memory
ASRock X99 Xtreme 4 MB
Windows 10


Sorry, long post to describe what is happening....

I was surfing the internet and the computer suddenly and without warning completely shut down.  When I pressed the power button on my tower, the computer would act like it was starting, but only for 2 or 3 seconds, then it would shut down for 2 or 3 seconds, then it would start for 2 or 3 seconds, then it would restart for 3 seconds, etc., until I turned off my power supply.

I thought it was the power supply, but after unseating and reseating the RAM, the computer would boot up seemingly normally and post to BIOS, but the BIOS was only recognizing 4GB of my 16GB of DDR4 RAM, properly inserted in the correct slots.  CPU and MB temp showed around 35C off the top of my head.

I shut the computer down and changed the button battery on the MB, that did not help.

I then used only 2 sticks of RAM at a time, properly inserted in the slots needed when only 2 sticks are used, and I could get it to post, but still BIOS only recognized 4GB of my 8GB of RAM.  Tried to boot to windows and got "stopcode bugcode USB driver error."  Couldn't get Windows 10 to boot.

OK, was thinking bad RAM so I numbered the RAM to keep track of which was being used, and swapped RAM modules.  However, no matter which combination of two I used, I could not get the system to post, even with the old combination of two that worked before.

I'm thinking my MB went bad.  If it was the power supply, I wouldn't have been able to post or boot to the Windows 10 boot screen at all.  It it was the RAM, the switching of the various modules would have eliminated the bad stick and I would have been able to boot to BIOS.  Plus, should I be able to Post to BIOS with no RAM sticks in?  The system won't even do that.

Any advice appreciated.  I'm baffled and have never had a rig just suddenly quit like this one did!
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Xaltar View Drop Down
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Welcome to the forums

Without RAM the system will not post so that is normal. It sounds more like the memory controller on the CPU may have gone bad by the symptoms. Try removing the CPU, checking for bent/damaged pins in the socket as well as warping of the CPU substrate and or burn marks. If all is well, carefully clean the bottom of the CPU with some Isopropyl alcohol and something like a makeup removing pad making sure not to leave any cotton on there then reinstall it and test again.

Being an X99 platform the RAM should work in any slot (1 module), if it does not then there is a problem, either with the board or the CPU memory controller. 

I am sorry to hear about your issue, it is one of the worst kinds of issues you can encounter because the issue could be caused by 2 components. There is nothing worse than replacing the wrong one and having the issue persist.

There is a small chance it could be the RAM but that is less likely. If the RAM was running at a higher than rated voltage it is quite possible it burned out. If you can get your hands on another system to test it in you should try that.
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And I'd like to know if this is a new build or one that has been working properly for a while now?

Too what Make/Model/PN is the memory kit you're using?


But if it's a new build then yea, I concur with Xaltar. Time to pull the CPU and look closely in the socket. Or possibly have you over-tightened the CPU cooler? I've seen that alone cause seemingly weird random issues too.


Edited by wardog - 12 Nov 2016 at 5:44pm
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Originally posted by Xaltar Xaltar wrote:

Welcome to the forums

Without RAM the system will not post so that is normal. It sounds more like the memory controller on the CPU may have gone bad by the symptoms. Try removing the CPU, checking for bent/damaged pins in the socket as well as warping of the CPU substrate and or burn marks. If all is well, carefully clean the bottom of the CPU with some Isopropyl alcohol and something like a makeup removing pad making sure not to leave any cotton on there then reinstall it and test again.

Being an X99 platform the RAM should work in any slot (1 module), if it does not then there is a problem, either with the board or the CPU memory controller. 

I am sorry to hear about your issue, it is one of the worst kinds of issues you can encounter because the issue could be caused by 2 components. There is nothing worse than replacing the wrong one and having the issue persist.

There is a small chance it could be the RAM but that is less likely. If the RAM was running at a higher than rated voltage it is quite possible it burned out. If you can get your hands on another system to test it in you should try that.

Thanks Xaltar.

One of the first things I did when the system crashed was take the CPU cooler off, remove the CPU, and check for damage.  There wasn't anything obvious to me.  I then put the CPU back on the board, put new thermal paste on, then the cooler.  That, unfortunately  had no effect.

Thanks for the empathy!  : )  This does suck.  

I was thinking that it is likely not the RAM itself because I have 4 sticks and have tried every combination of two in the appropriate slots on the MB and one time it allowed me to post, but then not again.

This MB is less than a year old, so under warranty.  Does ASRock have a technical support phone number?  The only thing I have found is a customer service number and a tech support web form.


Edited by ualdriver - 13 Nov 2016 at 12:12am
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Originally posted by wardog wardog wrote:

And I'd like to know if this is a new build or one that has been working properly for a while now?

Too what Make/Model/PN is the memory kit you're using?


But if it's a new build then yea, I concur with Xaltar. Time to pull the CPU and look closely in the socket. Or possibly have you over-tightened the CPU cooler? I've seen that alone cause seemingly weird random issues too.

Thanks for replying Wardog.

I did build this system back in March 2016, and it worked perfectly the entire time until the system suddenly and without warning just quit working.  It was as if someone had suddenly shut the electricity off to my computer.

G.SKILL Ripjaws 4 Series 16GB (4 x 4GB) 288-Pin DDR4 SDRAM DDR4 2400 (PC4 19200) Desktop Memory Model F4-2400C15Q-16GRR


http://www.newegg.com/Product/Product.aspx?Item=N82E16820231792

That is the memory kit I purchased.  

I don't *think* I overtightened the cooler.  There is really nothing to overtighten I don't think.  It's the cooler below, and it just has a lever that you rotate through 180 degrees to fasten the cooler to the brackets on the MB.  

https://www.amazon.com/gp/product/B00BSKY1M4/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc=1


So the two of you are thinking either MB or CPU?  I guess I should buy a new MB and see if that fixes it?




Edited by ualdriver - 13 Nov 2016 at 12:15am
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wardog View Drop Down
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Use these two contacts seeings you're in the States.

Support Phone: 1-909-590-8308
Support Email: support@asrockamerica.com
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This is further followups knowing what you've told us up to this point.

How old is your EVGA 750 G2?

I just checked your memory. It's compatible and certified by G.Skill for this board.
http://www.gskill.com/en/configurator?manu=52&chip=2276&model=2297



You might also try this as I've seen parsec recommend it at times:"
http://forum.asrock.com/forum_posts.asp?TID=3737&PID=18644&title=unusual-crashing#18644

Originally posted by parsec parsec wrote:

You should have VCCSA and VCCIO voltage offset settings in the UEFI/BIOS. You could try using a positive 0.1V additional offset voltage to stabilize your memory.
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Originally posted by wardog wardog wrote:

How old is your EVGA 750 G2?


I'm leaning more and more towards the PSU being the culprit here. Unfortunately, being separated by miles and miles of fiber and coax it's a tough decision.

Here I'd say borrow a PSU that meets what your system needs watt wise to test with.
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Originally posted by wardog wardog wrote:

This is further followups knowing what you've told us up to this point.

How old is your EVGA 750 G2?

I just checked your memory. It's compatible and certified by G.Skill for this board.
http://www.gskill.com/en/configurator?manu=52&chip=2276&model=2297



You might also try this as I've seen parsec recommend it at times:"
http://forum.asrock.com/forum_posts.asp?TID=3737&PID=18644&title=unusual-crashing#18644

Originally posted by parsec parsec wrote:

You should have VCCSA and VCCIO voltage offset settings in the UEFI/BIOS. You could try using a positive 0.1V additional offset voltage to stabilize your memory.




Good.  I was pretty sure the memory was compatible as well, so thanks for the double check.

I'd do the voltage thing if I could get it into BIOS.  Unfortunately, I can't even get to that point.  

The power supply was purchased brand new in March 2016.  The whole build used brand new parts and worked great without one problem until now.  I have an older 750W power supply that works that I am going to plug into the system today to eliminate the power supply as the source of the problem.  

If it ends up being the power supply, I'll post back.  Otherwise, I guess I'll buy a new motherboard and try that and post back in a few days when it arrives.
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I guess I should post this other little tidbit....

When I pulled the 4 sticks of RAM and went to various combinations of two sticks in an attempt to find what I though might be one bad stick, I did get the system to post to BIOS.  I exited BIOS and attempted to boot to Windows 10, and it looked and acted like it was going to work, but then i got this error message:

stopcode bug code USB driver

Of coruse, now I can't even get it to post to BIOS so I can't diagnose the USB driver error.  Not sure if that helps with the troubleshooting.
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