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PC Hard Restarts Z170 Extreme4 |
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xHardz 
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Joined: 11 Jan 2017 Status: Offline Points: 5 |
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 Topic: PC Hard Restarts Z170 Extreme4Posted: 11 Jan 2017 at 4:37pm |
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Xaltar
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Joined: 16 May 2015 Location: Europe Status: Offline Points: 24053 |
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Posted: 11 Jan 2017 at 5:12pm |
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Welcome to the forums and thanks for the detailed description and parts list
 Any time you have an issue that results in hard resets or unexplained shut downs your first stop should always be to check your power cables and reseat them. If that does not help then try a different PSU. Check in your Event Logs in "event viewer" (use Windows search in on your taskbar) under "Windows Logs" -> "System". You can set a filter for critical errors. If you see any "Kernel Power" errors and you did not power off your PC improperly then the issue is almost certainly power related. Even if there are no such errors you should try another PSU to be sure.
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xHardz
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Posted: 11 Jan 2017 at 6:59pm |
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Yeah each time it restarts pretty much the only this is the Kernel Power error along with your system shutdown unexpectedly.
Its late here in the AU so I will check power cables and reseat them all tomorrow. Maybe an odd question, but could it be my power board? Its a surge protected one with 8 ports. 2 Benq 24" monitors, the PC, an external HDD and a laptop charger. As far as PSU, I really did think if there was an issue it would show under load more so than on the desktop. I just ran a 3 hour session of online R6:Siege without issue. TS, Adobe Audition and chome open in the background.
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Xaltar
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Joined: 16 May 2015 Location: Europe Status: Offline Points: 24053 |
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Posted: 11 Jan 2017 at 7:13pm |
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Power Supplies are a lot more complicated these days. The issue could be coming from load switching which happens more frequently when the PSU isn't under heavy load. In that case it would behave exactly as you say, fine under consistent load but then unstable when the load is fluctuating.
As for your surge protector I doubt it could be the issue (in this situation) as, like you said, the issue happens under lower load scenarios. If it were a UPS then it could be possible that the load circuitry is defective in the same way I mentioned regarding the PSU. I don't use surge protectors/UPSes on my systems for other reasons but the power here is very stable.
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wardog
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Joined: 15 Jul 2015 Status: Offline Points: 6447 |
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Posted: 11 Jan 2017 at 11:04pm |
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Bwhahahah You suffered through this ALONE for two whole weeks? Bwhahahaha Is this a new build or one that's been running fine for some time now? Hard restarts can usually be traced to memory, temps, and or power. |
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parsec
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Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Posted: 11 Jan 2017 at 11:23pm |
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I agree with Xaltar that the PSU is suspect until proven otherwise.
Given your description, the PC shutting off during low load conditions, when temperatures are not an issue, I would try another PSU first, unless I had other hints about something else. When Haswell processors were released (I know you don't have a Haswell...), which were so power efficient that they could cause very low loads on the 12V rail of the PSU, some PSUs would shut off because their protection circuits thought something was wrong. That could easily be worked around by having fans in the PC using 12V power. Your PSU is Haswell rated, but I did see a minimum spec of 0.6A of the 12V rail, which is 7.2 Watts. It could simply be the PSU power connectors need reseating, that is a good suggestion and free to do. Look closely at the top of the connector that goes into the board, each of the wires/pins. Do they all look like they are at the same depth within the connector? Meaning a pin is not inserted deep enough into the socket on the board. If there is a relatively high resistance connection for one of more pins, during low power loads the current flow could go below what is needed, and the board shuts off. When it starts again, it needs more power so works fine again. The 12V 4/8 pin connector for the CPU on the board can be difficult to plug in when building a PC. If I recall my CM 690 case, it was very tight and difficult getting that cable connected. |
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xHardz
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Posted: 17 Jan 2017 at 5:23pm |
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I posted on another forum at the same time as the above post, just a copy paste, and most people seem to point towards the PSU. They wanted some screenshots of HWinfo64 both running during idle and load. Maybe the below can shed some light. Thanks for all the info in the above posts, I will give it a good check over and reseat all the cables over the weekend when I can dedicate some time to it. I was away for the weekend and the PC went into sleep mode and came out fine. Sunday arvo/monday were ALOT cooler than it had been and there were no restarts. Today is a return to the heat and I have just had a restart while browsing/idle. Ran R6:Siege for about 15 minutes to get the below results.   Edited by xHardz - 17 Jan 2017 at 5:24pm |
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xHardz wrote: