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  1. #1
    New ROGer Array
    Join Date
    Jul 2019

    i9-9900 (non K) has AVX -1 -- can't find AVX in BIOS

    I have an i9-9900 (non K) running on my ROG STRIX Z370-i motherboard. Whenever I run an all-core work load that doesn't have AVX instructions (e.g., Cinebench R15), the CPU boosts to 4.6 GHz as it should. Whenever I run an all-core workload with AVX instructions (e.g., Cinebench R20 or Handbrake), the CPU will only boost to 4.5 GHz. I've used the Intel Extreme Tuning Utility to verify that an AVX -1 is being applied (although, it is grayed out so I can't change it).

    I've looked through the UEFI BIOS pages from top to bottom, and I cannot find anything mentioning the AVX offset. I have the latest version of the BIOS installed (2401, dated 7/12/2019). Is there some other setting I need to change in the BIOS that will expose the AVX offset?

  2. #2
    ROG Guru: Orange Belt Array XYchromosone PC Specs
    XYchromosone PC Specs
    MotherboardASUS Maximux XI Extreme [BIOS 1602]
    Processori9 9900KS
    Memory (part number)G.Skill Trident Z RGB CL17 3600MHz 32GB [4x8]
    Graphics Card #1ASUS ROG Strix Gaming GTX 1080Ti 11GB
    MonitorAOC AGON AG271QG 27" 144Hz [165Hz OC]
    Storage #12 X Samsung 970 Pro NVMe 1TB M.2 SSD [DIMM.2_1+ DIMM.2_2]
    Storage #2Samsung 850 Evo SSD 500GB SATA 3
    CPU CoolerThermaltake Floe Riing 360 Premium AIO
    CaseFractal Design Define R6 Black
    Power SupplyCorsair AX1600i
    Keyboard RAZER Blackwidow X Tournament Chroma
    Mouse RAZER Lancehead [ambidextrous] Chroma
    Headset Sennheiser RS165 Wireless
    Headset/Speakers Sennheiser CX 100 inner ear headphones
    OS Windows 10 Pro x64 + Ubuntu Studio 20.04
    Network RouterASUS DSL-AC68U
    XYchromosone's Avatar
    Join Date
    Dec 2015

    If memory serves me, the BIOS omits AVX tweaking on non-K CPUs you need an unlocked CPU to be able to adjust AVX and CPU multiplier etc.

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