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10-28-2019 12:51 AM #1ROG Member Array
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Hero XI suddenly having restart issues goes to memok bios screen
Im suddenly having issues with restarting my PC about half the time. Doesn't seem to happen when booting from shut down, only restarts. I've been running the same bios settings for about a year without issue. Any ideas what's causing this?
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10-28-2019 04:20 PM #2ROG Guru: Orange Belt Array bass junkie xl PC Specs
bass junkie xl PC Specs Motherboard Asus Rog X Hero Z-370 ( Wifi ) bios -2103 Processor i9-9900 Ks @ 5.0 @ 1.23v @ manual vcore , De Lid + rockit cool copper ihs Memory (part number) G.Skill Trident Z RGB 16 GB 3000 Mhz cl-14 @ 4000 Mhz cl-17-19-19-39 @1.4v 1.21v vccio/vcssa Graphics Card #1 Msi Gtx 1080 TI FE @ 1911 mhz @ 1.0v Curve Sound Card Motherboard Realtec , Driver 87.46 Monitor Asus PG279Q , 27 inch 165 HZ , 1440p G-Sync Storage #1 Samsung 970 evo 1 TB m.2 nvme ssd Storage #2 Samsung 970 evo 1 TB m.2 nvme ssd CPU Cooler Gamermaxx L360 v2 Case Thermaltake View 71 full Glass Power Supply Thermaltake Grand 750w RGB Platnuim Keyboard Corsair K95 Platnuim RGB Mouse Corsair Night Sword RGB Headset Razer Kraken 7.1 chroma Mouse Pad Asus Sheeth Large Headset/Speakers Logitech Z-5500 THX 5.1 OS Windows 10-1809 x64 Pro 
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asus x hero wifi z 370 latest bios 2103 same thing memory training = 4 restarts and a mem safe ok screen when the ram is perfectly stable and fine shut off mch full check and fast boot to on under memory timmings near the bottom
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10-29-2019 09:02 PM #3New ROGer Array
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What Q-code does it display and are any of the LED's on under the q-code display?
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10-30-2019 06:17 AM #4Administrator Array
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Originally Posted by bass junkie xl
Memory instability. The applied settings arent passing training, so the subsequent restarts are the system attempting to do so. With XMP 1 applied, try using Maximus Tweak Mode 1. You may need to tune VCSSA depending on the CPU and memory kit. Â*
Hard resets can be a sign of memory instability, test your applied settings with a memory stress test such as HCI Mem test pro or Karhu ram test. Originally Posted by Mobber
You may also wish to check your event log to see if the system is logging stop codes, and test the system with a different power supply if possible.
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10-31-2019 06:39 AM #5ROG Member Array
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So I seemed to have fixed it. I had already done substantial memory stability test before but thanks for the suggestions. It seems my bios had somehow gotten corrupted or something weird with it. I went into bios and loaded optimized defaults. Then I loaded windows and downloaded the latest bios (which is what I was running before) and put it on a freshly formatted USB. I then loaded bios and flashed the bios. I reentered all my overclock settings and it's been running flawlessly ever since. I've done multiple restarts and cold boots with no resets. I'm wondering if something happened when I originally flashed this bios and it didn't quite flash properly or something. Very odd but seems to be working good now so happy about that.
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10-31-2019 08:02 AM #6Administrator Array
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Still sounds like memory instability. Subsequent clear of the UEFI / flash probably cleared whatever was stuck in NVRAM. Originally Posted by Mobber
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10-31-2019 11:33 PM #7ROG Member Array
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How do I test for memory instability more? I've ran memtest hci for 1000% with no errors. Ive ran prime and occt without crashes and I'm not getting crashes when I use the computer. No resets since I flashed new bios. I'm running the xmp profile on the ram 32gb@4000mhz with io 1.25 sa1.25
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