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  1. #1
    ROG Junior Member Array derridada PC Specs
    derridada PC Specs
    MotherboardAsus ROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X
    Memory (part number)G.Skill F4-3600C16D-16GTZNC
    Graphics Card #1ASUS ROG STRIX GeForce RTX 2080 O8G-GAMING
    MonitorGigabyte AORUS AD27QD
    Storage #1Samsung 970 EVO NVMe M.2 1TB
    Storage #2Crucial MX500 2TB
    CPU CoolerNoctua NH-U12S, with 2 Noctua NF-F12 iPPC 2000 PWM fans
    CaseNZXT H700i
    Power SupplySeasonic Prime Ultra 1000W 80 Plus Titanium
    Keyboard Mionix Wei
    Mouse Logitech G502
    OS Windows 10 Pro
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    Exclamation Asus ROG CROSSHAIR VIII HERO (WI-FI) random shut downs/reboots, high temps/ voltages

    My system shuts down randomly, and then just reboots. There is no bsod, no log, no dump, no diagnostics. There is no way to tell why this happens, but it seems as if the CPU hits the 95 C max and reboots for safety, but that is just my guess.
    I’m running the latest chipset driver and BIOS.

    Specs:
    - AMD Ryzen 9 3900X on ROG CROSSHAIR VIII HERO (WI-FI); with latest AMD chipset driver and BIOS 0803
    - GPU: ASUS ROG STRIX GeForce RTX 2080 O8G-GAMING
    - RAM: G.Skill F4-3600C16D-16GTZNC DDR4-3600 on CL16-19-19-39 at 1.35V
    - PSU: Seasonic Prime Ultra 1000W 80 Plus Titanium
    - Cooling: CPU: Noctua NH-U12S, with 2 Noctua NF-F12 industrial PPC 2000 PWM fans
    - OS Drive: Samsung 970 EVO NVMe M.2 1TB with Windows 10 Pro, version 1903

    This happens both in Windows balanced / Ryzen balanced power plans. Temperatures are around 50-55C idling/low usage, which are on the high side. When idling/low usage, the CPU shows erratic voltage jumps, with a high, average ‘baseline’ of 1.464V. It does cycle below 1.0V, but only very sporadically, and very erratically.

    The problem is that under load when gaming, the temps shoot up to 80 and beyond. Ultimately the system shuts down. I am running everything stock – no OC profiles.
    The last time it happened was while playing Destiny 2 yesterday. Which is ironic, since the idling/power issue was supposedly patched with the latest AMD chipset driver and Asus BIOS.

    I’ve cleared CMOS, flashed BIOS a few times with optimized defaults, reinstalling Win 10, uninstalling Armory Crate and disabling it right in the BIOS, disabling AURA.
    I’m not using Asus Ai Suite, or anything like it; BIOS is stock, except for fan profiles.
    It’s running on Power saver mode now, which is extremely stable, but not exactly blindingly fast.
    Last edited by derridada; 09-09-2019 at 10:19 PM. Reason: correction

  2. #2
    ROG Member Array AngryAce PC Specs
    AngryAce PC Specs
    Laptop (Model)Sager 9170
    MotherboardAsus Maximus XI Formula
    ProcessorIntel i9-9900-K
    Memory (part number)Corsair 3200mhz SE Blackout
    Graphics Card #1eVGA GTX 1080Ti HydroCopper SC2
    Sound CardSound Blaster AE-7
    MonitorAsus ROG 34" Ultra-Wide
    Storage #1Sabrent Rocket 2TB NVME
    CPU CoolerCorsair XC7
    CaseLian Li Dynamic
    Power SupplyeVGA SuperNOVA 1000 P2
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    In my experience, random reboots like your describing indicate a PSU issue. Under what conditions are you hitting 95c? It seems to me the Noctua CPU cooler should be doing a better job than that under gaming loads. I would redo the TIM and try to get those temps under control. If you're still having random reboots, try a different PSU.

  3. #3
    ROG Junior Member Array derridada PC Specs
    derridada PC Specs
    MotherboardAsus ROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X
    Memory (part number)G.Skill F4-3600C16D-16GTZNC
    Graphics Card #1ASUS ROG STRIX GeForce RTX 2080 O8G-GAMING
    MonitorGigabyte AORUS AD27QD
    Storage #1Samsung 970 EVO NVMe M.2 1TB
    Storage #2Crucial MX500 2TB
    CPU CoolerNoctua NH-U12S, with 2 Noctua NF-F12 iPPC 2000 PWM fans
    CaseNZXT H700i
    Power SupplySeasonic Prime Ultra 1000W 80 Plus Titanium
    Keyboard Mionix Wei
    Mouse Logitech G502
    OS Windows 10 Pro
    Network RouterAsus RT-AC86U
    derridada's Avatar
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    I do hope it's not the PSU; just bought this Seasonic Prime Ultra 6 months ago, and was working fine in my previous build, an i-7 6700k on Asus 170 deluxe - and I do not have an older psu i can test, unfortunately. Though I will reapply the TIM - thanks for the tip.

  4. #4
    ROG Member Array AngryAce PC Specs
    AngryAce PC Specs
    Laptop (Model)Sager 9170
    MotherboardAsus Maximus XI Formula
    ProcessorIntel i9-9900-K
    Memory (part number)Corsair 3200mhz SE Blackout
    Graphics Card #1eVGA GTX 1080Ti HydroCopper SC2
    Sound CardSound Blaster AE-7
    MonitorAsus ROG 34" Ultra-Wide
    Storage #1Sabrent Rocket 2TB NVME
    CPU CoolerCorsair XC7
    CaseLian Li Dynamic
    Power SupplyeVGA SuperNOVA 1000 P2
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    Quote Originally Posted by derridada View Post
    I do hope it's not the PSU; just bought this Seasonic Prime Ultra 6 months ago, and was working fine in my previous build, an i-7 6700k on Asus 170 deluxe - and I do not have an older psu i can test, unfortunately. Though I will reapply the TIM - thanks for the tip.
    Computer issues... can be anything and everything.. . It is possible when you hit TJ max the CPU crashes the system but it is suppose to throttle. I have the same motherboard but with a 3600x. I only get to 95c under prime95 (small FFT) and the CPU throttles. Gaming, its 55 to 60c with Corsair h115i. I realize I have 1/2 the cores of the 3900x but 95c gaming seems high to me. Let us know how it goes!

  5. #5
    ROG Junior Member Array derridada PC Specs
    derridada PC Specs
    MotherboardAsus ROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X
    Memory (part number)G.Skill F4-3600C16D-16GTZNC
    Graphics Card #1ASUS ROG STRIX GeForce RTX 2080 O8G-GAMING
    MonitorGigabyte AORUS AD27QD
    Storage #1Samsung 970 EVO NVMe M.2 1TB
    Storage #2Crucial MX500 2TB
    CPU CoolerNoctua NH-U12S, with 2 Noctua NF-F12 iPPC 2000 PWM fans
    CaseNZXT H700i
    Power SupplySeasonic Prime Ultra 1000W 80 Plus Titanium
    Keyboard Mionix Wei
    Mouse Logitech G502
    OS Windows 10 Pro
    Network RouterAsus RT-AC86U
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    Well, it's not the thermal paste. If only it were this simple!
    I reinstalled the heat sink and fans, this time using Noctua NT-H2 instead of my usual Kryonaut, but I'm not seeing any significant changes.

    It just seems that the system never truly idles down; voltage remains at 1.46V most of the time, even when idling/low usage (it occasionally dips below 1.0V, but only for a second). This despite the fact that I'm running the latest chipset driver and BIOS, which were supposed to fix the idling issues.

    I ordered a PSU just to exclude it; if it is the PSU I'll have to RMA and then return the new unit for a refund if this does indeed turn out to be the issue - I've already invested too much already.

    Back to 'power saver mode' and 2.1 GHz for now...

  6. #6
    ROG Member Array AngryAce PC Specs
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    Laptop (Model)Sager 9170
    MotherboardAsus Maximus XI Formula
    ProcessorIntel i9-9900-K
    Memory (part number)Corsair 3200mhz SE Blackout
    Graphics Card #1eVGA GTX 1080Ti HydroCopper SC2
    Sound CardSound Blaster AE-7
    MonitorAsus ROG 34" Ultra-Wide
    Storage #1Sabrent Rocket 2TB NVME
    CPU CoolerCorsair XC7
    CaseLian Li Dynamic
    Power SupplyeVGA SuperNOVA 1000 P2
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    Quote Originally Posted by derridada View Post
    Well, it's not the thermal paste. If only it were this simple!
    I reinstalled the heat sink and fans, this time using Noctua NT-H2 instead of my usual Kryonaut, but I'm not seeing any significant changes.

    It just seems that the system never truly idles down; voltage remains at 1.46V most of the time, even when idling/low usage (it occasionally dips below 1.0V, but only for a second). This despite the fact that I'm running the latest chipset driver and BIOS, which were supposed to fix the idling issues.

    I ordered a PSU just to exclude it; if it is the PSU I'll have to RMA and then return the new unit for a refund if this does indeed turn out to be the issue - I've already invested too much already.

    Back to 'power saver mode' and 2.1 GHz for now...
    Mine never really clocks down either, even with the Ryzen Balanced power plan. With that said, hitting 95c and shutting down under gaming loads is simply not normal. Every review I've seen of the 3900x, the thermals are in the 65 to 75c range whether air or AIO cooled during gaming. Pauls hardware did a aida64 burn in test and his 3900x averaged 79c with Noctua NH-U12A on an open test bench.

    I don't know your level of building experience but I assume you applied enough TIM with good coverage, removed any protective stickers on the CPU cooler block, cleaned both CPU and cooler block with IPA and have good air flow through your case.

    While random shutdowns are usually the result of a faulty PSU, I am beginning to think you have a defective CPU if all those conditions above are met. The CPU should thermal throttle when it hits tjmax not shut down altogether. it is difficult to diagnose these types of problems without having extra gear to swap out and test with.

    Perhaps others on this forums have some insight to help you! Keep us updated!!!

  7. #7
    ROG Junior Member Array derridada PC Specs
    derridada PC Specs
    MotherboardAsus ROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X
    Memory (part number)G.Skill F4-3600C16D-16GTZNC
    Graphics Card #1ASUS ROG STRIX GeForce RTX 2080 O8G-GAMING
    MonitorGigabyte AORUS AD27QD
    Storage #1Samsung 970 EVO NVMe M.2 1TB
    Storage #2Crucial MX500 2TB
    CPU CoolerNoctua NH-U12S, with 2 Noctua NF-F12 iPPC 2000 PWM fans
    CaseNZXT H700i
    Power SupplySeasonic Prime Ultra 1000W 80 Plus Titanium
    Keyboard Mionix Wei
    Mouse Logitech G502
    OS Windows 10 Pro
    Network RouterAsus RT-AC86U
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    Turns out it was the PSU after all...

    I was getting some high voltage and power readings in HWiNFO64, and decided to go ahead and order a different PSU thinking that I’d always be able to return it to Amazon within 30 days. Well, seems like my original unit, the Seasonic Prime Ultra Titanium 1000W, was way off :
    - CPU core current: average: 20.89 A
    - Core power: core 1 power average 1.12 W / core 2: 0.94 W / core 3: 4.34 W core 6: 1.80 W / core 9: 1.34 W etc.
    - CPU core power average: 30.12 W
    CPU die/package temps from 55-62, with a minimum of 48 with no apps running.

    Compare this to the (temporary?) replacement PSU, Corsair AX850:
    -CPU core current: average: 9.34 A
    - Core power: core 1 power average 0.50 W / core 2: 0.27 W / core 3: 2.22 W core 6: 0.13 W / core 9: 0.10 W etc.
    - CPU core power average: 13.08 W
    CPU die/package temps from 45-50 on average load, 40-45 when idling/low load. *

    So... I invested quite a bit in the*Seasonic, and I am rather disappointed. This is a 6-month old unit, and Titanium to boot. It’s possible the unit was already off in my previous i6700k build, but I never noticed anything on a lower core CPU.

    Anyhow, I’m relieved as this seems the solution; still waiting to hear back from Seasonic to see what they can do.
    As the temps/voltages have gone down, so has my blood pressure!

  8. #8
    ROG Member Array AngryAce PC Specs
    AngryAce PC Specs
    Laptop (Model)Sager 9170
    MotherboardAsus Maximus XI Formula
    ProcessorIntel i9-9900-K
    Memory (part number)Corsair 3200mhz SE Blackout
    Graphics Card #1eVGA GTX 1080Ti HydroCopper SC2
    Sound CardSound Blaster AE-7
    MonitorAsus ROG 34" Ultra-Wide
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    I've bought brand name PSUs that have failed quick over the years, one spectacularly on first boot (actual fireball). Just the nature of electronics. Your Seasonic should be under warranty so they should honor an RMA. Never used them before although my EVGA 1000 PS is a Seasonic, which failed....lol. Glad you got it figured out!

  9. #9
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    Quote Originally Posted by derridada View Post
    Turns out it was the PSU after all...

    I was getting some high voltage and power readings in HWiNFO64, and decided to go ahead and order a different PSU thinking that I’d always be able to return it to Amazon within 30 days. Well, seems like my original unit, the Seasonic Prime Ultra Titanium 1000W, was way off :
    - CPU core current: average: 20.89 A
    - Core power: core 1 power average 1.12 W / core 2: 0.94 W / core 3: 4.34 W core 6: 1.80 W / core 9: 1.34 W etc.
    - CPU core power average: 30.12 W
    CPU die/package temps from 55-62, with a minimum of 48 with no apps running.

    Compare this to the (temporary?) replacement PSU, Corsair AX850:
    -CPU core current: average: 9.34 A
    - Core power: core 1 power average 0.50 W / core 2: 0.27 W / core 3: 2.22 W core 6: 0.13 W / core 9: 0.10 W etc.
    - CPU core power average: 13.08 W
    CPU die/package temps from 45-50 on average load, 40-45 when idling/low load. *

    So... I invested quite a bit in the*Seasonic, and I am rather disappointed. This is a 6-month old unit, and Titanium to boot. It’s possible the unit was already off in my previous i6700k build, but I never noticed anything on a lower core CPU.

    Anyhow, I’m relieved as this seems the solution; still waiting to hear back from Seasonic to see what they can do.
    As the temps/voltages have gone down, so has my blood pressure!
    Hey Derridada.... how is your system now?

    I am still waiting for the right moment to take the leap of faith and buy Asus Crosshair VIII Hero (WI-FI). Can you please tell me if the system is completely stable with the latest BIOS (I think it is version 1001)? I will us it with:
    Ryzen 3700x
    G.Skill Trident Z RGB 32GB DDR4 Kit 32GTZR (F4-3200C16D-32GTZR)
    Samsung SSD 970 Evo Plus M.2 NVMe 1 TB
    ASUS GeForce RTX 2060 SUPER DUAL
    Corsair power supply.

    Can I expect any problems with AMD build? Any problems at all?

    Thanks a lot!

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