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  1. #1
    New ROGer Array irisheart PC Specs
    irisheart PC Specs
    MotherboardStrix Z370-I
    Processori7-8700K
    Memory (part number)Ballistix Sport LT Gray 32GB
    Graphics Card #1Strix GTX 1070
    CPU CoolerThermaltake Riing 240
    irisheart's Avatar
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    Aug 2016
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    Strix Z370-I voltage spikes, thermal runaway at high temperatures

    I recently got my hands on an 8700K (finally!) and a Strix Z370-I. The processor is pretty solid at 1.3V and 4.9GHz; load power consumption for the rig (960 PRO, GTX 1070) is about 190W under Prime 95. However, there seems to be a bug (feature?) - at high temperatures, the VRM's seem to raise the Vcore to well above what I've requested in the BIOS. This is evident on the power meter - power consumption jumps from 190W to 230W+. Furthermore, at higher Vcore's and frequencies (1.4V, 5GHz), these voltage excursions lead to thermal runaway - power consumption will jump to 290W, leading to rapid overheating of the VRM's and consequent shutdown.

    Looking around the forums it seems like this kind of behavior is present across the entire ROG line, and has something to do with SVID and LLC. I've made all the appropriate adjustments in the BIOS (optimistic SVID, CPU DC load line set to 0.01, etc). Is there a BIOS fix that will make the automatic voltage adjustments less aggressive, or even better, force adaptive voltage to output a fixed voltage under load?

  2. #2
    ROG Guru: White Belt Array SherardG PC Specs
    SherardG PC Specs
    Laptop (Model)ASUS ROG G752 & ASUS ROG G55VW
    MotherboardASUS ROG Maximus X Hero
    ProcessorIntel® Core™ i7-8700K
    Memory (part number)32 GB [G.Skill TZRGB] F4-3200C32Q-8GTZR x 4
    Graphics Card #1ROG-STRIX-GTX1080TI-O11G-GAMING
    MonitorASUS ROG PG248Q
    Storage #1Samsung 960 PRO MZ-V6P512 (512 GB)
    Storage #2WD2003FZEX
    CPU CoolerNZXT Kraken X62
    CaseNZXT Noctis 450 ROG
    Power SupplySeasonic PRIME 80+ Ti 750 SSR-750TD
    Keyboard Logitech G413 Carbon
    Mouse Logitech G502 Proteus Spectrum
    Headset Razer Kraken Pro V2 Black
    Mouse Pad Logitech G440
    OS Windows 10 10.0.16299
    Network RouterASUS RT-AC88U
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    I have never experienced consequent shutdown on use, but I would suggest doing an adaptive voltage setting with negative offset and LCC @ 5 or 6.

    I am merely stating what works for me and I am in no way an expert, but feel free to experiment further.

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