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Hot!Samsung EVO 970 Question.

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ander12391
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2019/01/11 13:33:20 (permalink)
Just installed my new EVO 970 onto my Z370 FTW and everything is working for the most part. However I noticed something strange. If I pull the ac power cord from the system then attempt to power the system back on. The mobo will click on for a sec POST code "C" for a split second will flash then the system will turn off then turn back on and POST normally. This only happens if the power cord is pulled. Normal shutdowns do not cause this issue. Its almost like when standby power is pulled from the system the M.2 has to reinitialize or something. Anyone else notice this?
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    Cordorb
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    Re: Samsung EVO 970 Question. 2019/01/11 15:57:15 (permalink)
    A normal shut down does not remove all power.  there can still be some 3.3 v to cmos
    check to see if bios did not get reset on a power plug pull out (low battery or other problem )
     
    I never use any fast boot or sleep mode setting and have a full re-load  restart set
     
    Early SSD did have some type of  problem with no power but not ( I think)  that  one you have.
    you can always check the SMART data for power loss.
    #2
    bcavnaugh
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    Re: Samsung EVO 970 Question. 2019/01/11 16:00:47 (permalink)
    Make sure your 8-Pin EPS/CPU Power Cable is click and locked in on the Motherboard side as well as the Power Supply side.
    Make sure all the Pins are pushed in all the way in the Connectors.
    You should also check the 24-Pin Connectors on both sides as well.
    post edited by bcavnaugh - 2019/01/11 16:03:35


    #3
    ander12391
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    Re: Samsung EVO 970 Question. 2019/01/11 16:52:33 (permalink)
    I think I am explaining it wrong. The issue is that when ever the system looses AC power the following POST is delayed because the unit will turn off and back on. 
     
    Here's a video of me replicating the issue. 
     
    https://www.youtube.com/watch?v=0kPLjIkoTY8
    #4
    bcavnaugh
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    Re: Samsung EVO 970 Question. 2019/01/11 17:12:03 (permalink)
    No Post Code "C" Then?
    Is Fast Boot Enabled in the Bios.
    I cannot turn off my X370 FTW MB to test this but if I recall mine does the same. But looks normal to me.
    Are you waiting for all the Motherboard Lights to go Out when your turn it off in the Video before your turn back on the PSU?
     
    post edited by bcavnaugh - 2019/01/11 17:23:44


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    ander12391
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    Re: Samsung EVO 970 Question. 2019/01/11 17:26:39 (permalink)
    Yeah attempts to post then stops turns off then post just fine and boots into Windows. This only happens if i turn off the PSU or unplug the PSU when the computer is turned off. I think its fine just something I noticed when I moved my computer back to my Office after the install of the M.2 and Windows was completed. I will have to check the fast boot settings when I get a chance. And now that I think about it. It doesn't really stay on POST CODE C its just the last code it cycles to before restarting. And I was waiting for the lights on the mobo to go off before turning it back on. 
    post edited by ander12391 - 2019/01/11 17:34:41
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    bcavnaugh
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    Re: Samsung EVO 970 Question. 2019/01/11 18:11:52 (permalink)
    Same on mine from a Cold Boot, that is the Power Supply is Off.
    I have never seen this on a Warm Boot.


    #7
    GGTV-Jon
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    Re: Samsung EVO 970 Question. 2019/01/11 18:44:09 (permalink)
    Normal for the double power button push from a full power disconnect
    Also - I am running my X299 Dark with the EIST enabled (Euro power setting) in Advanced / CPU Config to power down all the board lights and connected USB devices (shuts down keyboard LEDs) and it acts the same way on boot up


    #8
    zaphrodbox
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    Re: Samsung EVO 970 Question. 2019/01/13 22:06:10 (permalink)
    My Z370 MICRO will always show post code C whenever I try to shutdown or start up.  Post code C and all fans to 100%.  The only way I can shut down is initiate it then once post code C comes up I have to shut down the power at the PSU and then once I turn on the power post code C will show again until I hit the power button on the MOBO then it will cycle and post like normal.  Very strange and I have tried everything.  I have a new Z390 DARK in the mail and will see if it continues in which case it is likely my CPU otherwise the MOBO is broken.


     
    #9
    bcavnaugh
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    Re: Samsung EVO 970 Question. 2019/01/14 11:02:21 (permalink)
    @zaphrodbox Make sure all your Cables a locked in and that all the Pins are all the way in each connector.


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    GGTV-Jon
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    Re: Samsung EVO 970 Question. 2019/01/14 11:41:17 (permalink)
    Afar far as the the momentary power up / power down when turning on the PSU I have seen that on a lot of stuff, never thought it was abnormal. As long as it boots up fine on start up.
     
    @zaphrobox take a good look at the connections where the power and reset buttons connect to the motherboard and make sure you have them on there correctly


    #11
    zaphrodbox
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    Re: Samsung EVO 970 Question. 2019/01/14 22:57:47 (permalink)
    GGTV-Jon
    Afar far as the the momentary power up / power down when turning on the PSU I have seen that on a lot of stuff, never thought it was abnormal. As long as it boots up fine on start up.
     
    @zaphrobox take a good look at the connections where the power and reset buttons connect to the motherboard and make sure you have them on there correctly


    This might be a stupid question but what if I unplug all of the front button connections? Would the mobo still post C say like I was running it in a test bench? I have attached and reattached every wire so many times and finally decided to just unplug all the front panel connections after re-seating all power connections again and the board still will not shut down just goes to post code C and all fans to 100%.  
    It is also a ton of work to do this as if you check out my mod rig it is all behind a custom distro plate and hanging on my wall so takes a lot to disassemble and reassemble it to try and fix this issue.  The PC runs great under all other circumstances.  I appreciate the advice, but this one has me stumped still... Z390 DARK to the rescue!


     
    #12
    GGTV-Jon
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    Re: Samsung EVO 970 Question. 2019/01/15 11:33:22 (permalink)
    Just looked at your build in mods rigs - WICKED build there man
     
    Yes, with everything pulled off for the front panel it should have worked like it did on the test bench
     
    Let me get this straight now - when you are in windows and you tell it to shut down it blanks the screen like it shuts down with the post codes displaying C and the fans on high?


    #13
    zaphrodbox
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    Re: Samsung EVO 970 Question. 2019/01/15 13:14:37 (permalink)
    GGTV-Jon
    Just looked at your build in mods rigs - WICKED build there man
     
    Yes, with everything pulled off for the front panel it should have worked like it did on the test bench
     
    Let me get this straight now - when you are in windows and you tell it to shut down it blanks the screen like it shuts down with the post codes displaying C and the fans on high?


    Thanks.
    Yeah I tell windows to shut down and it will cycle some codes then end seemingly shut down but displaying post code C and all fans will spin up to 100%.  If I shut down the PSU it obviously shuts down the rest of the way, but when I turn back on the PSU it will immediately show POST C and 100% fans until I press the power button on the mobo then it will cycle and boot into windows like normal.  Very strange and does this with multiple different PSUs different wires.  I have re-seated the CPU checked pins and pretty much everything I can think of to no avail.  See my original thread about the issue but not sure there is any info not repeated here at this point...
    https://forums.evga.com/Post-Code-C-m2881972.aspx


     
    #14
    GGTV-Jon
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    Re: Samsung EVO 970 Question. 2019/01/15 13:21:14 (permalink)
    Zaphrodbox I will post in that other thread then


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