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  1. #1
    ROG Member Array CraYen PC Specs
    CraYen PC Specs
    Laptop (Model)Lenovo G500S
    MotherboardASUS Z170 Hero
    Processori7 6700k @4.5Ghz 1.24V
    Memory (part number)G. Skill RipJaws V 2x8GB 3000Mhz CL15
    Graphics Card #1Zotac 1070 AMP Extreme
    Sound CardAIM SC808 @2x LME49720NA + LM6172IN
    MonitorSamsung SyncMaster T190
    Storage #1Samsung SM951 256GB NVMe
    Storage #2WD Blue 1TB + Crucial MX200 500GB
    CPU CoolerBe Quiet! Dark Rock Pro 3
    CaseBe Quiet! Silent Base 800 Black @3x Be Quiet! SilentWings 2 120mm + 4x Be Quiet! SilentWings 2 140mm
    Power SupplyBe Quiet! Dark Power Pro P11 650W Platinum
    Keyboard ASUS Strix Tactic Pro
    Mouse ASUS Gladius
    Headset ASUS Strix Pro | HyperX Cloud v1
    Mouse Pad ASUS Strix Glide Control
    Headset/Speakers Ultrasone Pro 900
    OS Windows 10 x64 Home
    Network RouterTP-Link TL-WR1043N/ND v2 (Gargoyle)

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    EPU from AI Suite causes system and compressed memory (acpi.sys+0x1f9c0) go mad

    Hey guys,

    Ive been plagued by system and compressed memory process since I build my new system. Its eating up ~14% of my CPU (100% on one core) seemingly randomly. It could be right after login screen or after few hours. After digging in Windows Performance Analyzer and Process Explorer I found out that its acpi.sys+0x1f9c0 which causes this high CPU usage. The problem stops when in EPU I select Power Saving then go back to Performance mode. Does anyone else is experiencing this?

  2. #2
    ROG Enthusiast Array Eric_F PC Specs
    Eric_F PC Specs
    MotherboardMaximus VIII Hero
    ProcessorCore I7 6700K - 4.9GHz OC
    Memory (part number)G.Skill F4-3000C15D-16GVR 16GB (8x2) DDR4-3000
    Graphics Card #1EVGA GTX 1080 FTW2 1721/1860MHz
    Sound CardOnboard Realtek/ROG SupremeFX
    MonitorDell UltraSharp 1908WFP 19" Widescreen 1440x900 60/75Hz
    Storage #11TB Western Digital Black WD1003FZEX 7500RPM 64MB Cache 6 Gb/s SATA
    Storage #22TB Western Digital Black WD2003FZEX 7500RPM 64MB Cache 6 Gb/s
    CPU CoolerCorsair H80i v2
    CaseAntec Nine Hundred (w/ USB 3)
    Power SupplyAntec Edge 650 80+ Gold
    Keyboard Steelseries Apex
    Mouse Steelseries Rival
    Mouse Pad Tandy gray mousepad from the '90s!
    Headset/Speakers AKG K240M studio headphones & Adcom GTP-450 preamp on line-outs
    OS Windows 10 Pro
    Network RouterAsus RT-AC3200
    Eric_F's Avatar
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    Yes, I had this problem. (Running Win10 x64, Maximus VIII Hero, I7-6700K)

    It won't just get ACPI.SYS stuck; once that happens, you may have trouble with the computer sleeping/waking and shutting down. If the ACPI.SYS hang happens at just the wrong moment, the computer may spontaneously restart without any bluescreen error or error in the Event Log in Windows.

    I tried a LOT of things to eliminate it, but ultimately the only solution was to remove AI Suite. I was really only using it for Fan XPert anyway -- I did all my overclocking in the BIOS. So I just copied down all my fan and water pump speed settings and entered them into the BIOS too, and uninstalled AI Suite and ran the cleaner for good measure.

    Once that was done, the computer was rock-solid -- it certainly confirmed that the instability was NOT due to the overclock. (If you look in my sig, you'll see i run a fairly aggressive OC! )

    I also found that running the fan settings in the BIOS gave quicker, more consistent response from the fans. There was always a tiny but noticeable lag when controlling them through software.

    It's a shame -- I really liked AI suite, but it just doesn't seem to like either Windows 10 or the Intel Management Engine in Skylake CPUs.

    Incidentally, the ACPI.SYS hang isn't just a problem with ASUS and AI Suite. In all my searching for solutions, I also came across reports of exactly the same problems on other Skylake systems -- HP laptops in particular. It seems like any software that interacts with the Intel Management Engine (Which laptops may often have, for the energy-saving features) is susceptible to the problem.
    Motherboard: Maximus VIII Hero
    Processor: I7 6700K - 4.9GHz OC
    CPU Cooler: Corsair H80i v2
    Memory: G.Skill DDR4-3000 16GB
    Graphics: EVGA GTX 1080 FTW2 1721/1860MHz
    Storage #1: 1TB Western Digital Black
    Storage #2: 2TB Western Digital Black
    Case: Antec Nine Hundred
    Power Supply: Antec Edge 650 80+ Gold
    OS: Windows 10 Pro

  3. #3
    ROG Member Array CraYen PC Specs
    CraYen PC Specs
    Laptop (Model)Lenovo G500S
    MotherboardASUS Z170 Hero
    Processori7 6700k @4.5Ghz 1.24V
    Memory (part number)G. Skill RipJaws V 2x8GB 3000Mhz CL15
    Graphics Card #1Zotac 1070 AMP Extreme
    Sound CardAIM SC808 @2x LME49720NA + LM6172IN
    MonitorSamsung SyncMaster T190
    Storage #1Samsung SM951 256GB NVMe
    Storage #2WD Blue 1TB + Crucial MX200 500GB
    CPU CoolerBe Quiet! Dark Rock Pro 3
    CaseBe Quiet! Silent Base 800 Black @3x Be Quiet! SilentWings 2 120mm + 4x Be Quiet! SilentWings 2 140mm
    Power SupplyBe Quiet! Dark Power Pro P11 650W Platinum
    Keyboard ASUS Strix Tactic Pro
    Mouse ASUS Gladius
    Headset ASUS Strix Pro | HyperX Cloud v1
    Mouse Pad ASUS Strix Glide Control
    Headset/Speakers Ultrasone Pro 900
    OS Windows 10 x64 Home
    Network RouterTP-Link TL-WR1043N/ND v2 (Gargoyle)

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    Yeah exactly same things for me (problems with shutdowns, sleep/wakeups) although I did not have random restarts. I only wanted FanXpert coz I have a lot of fans but this issue forced me to uninstall AISuite and set fan curves in BIOS. Now system is rock solid and no problems (so far <.<)

    I wrote to ASUS support and told them that EPU causes system and process memory to go crazy. I sent them trace from windows performance analyzer but they wanted screenshot with the issue... The hell would have to freeze over before I install this garbage on my system again

  4. #4
    ROG Enthusiast Array Eric_F PC Specs
    Eric_F PC Specs
    MotherboardMaximus VIII Hero
    ProcessorCore I7 6700K - 4.9GHz OC
    Memory (part number)G.Skill F4-3000C15D-16GVR 16GB (8x2) DDR4-3000
    Graphics Card #1EVGA GTX 1080 FTW2 1721/1860MHz
    Sound CardOnboard Realtek/ROG SupremeFX
    MonitorDell UltraSharp 1908WFP 19" Widescreen 1440x900 60/75Hz
    Storage #11TB Western Digital Black WD1003FZEX 7500RPM 64MB Cache 6 Gb/s SATA
    Storage #22TB Western Digital Black WD2003FZEX 7500RPM 64MB Cache 6 Gb/s
    CPU CoolerCorsair H80i v2
    CaseAntec Nine Hundred (w/ USB 3)
    Power SupplyAntec Edge 650 80+ Gold
    Keyboard Steelseries Apex
    Mouse Steelseries Rival
    Mouse Pad Tandy gray mousepad from the '90s!
    Headset/Speakers AKG K240M studio headphones & Adcom GTP-450 preamp on line-outs
    OS Windows 10 Pro
    Network RouterAsus RT-AC3200
    Eric_F's Avatar
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    Feb 2016
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    I found that the random restart was the rarest problem of all -- It might never happen in a "plain vanilla" install of Windows 10 plus AI Suite. But I got to tinkering and troubleshooting, and eliminated the hibernation file, turned off sleep, limited the system timers to HPET, even disabled the scheduled task that triggers the "Away Mode" power save function in AI suite -- I left it very little to do except run the fans and give me the performance readouts. With AI Suite trimmed back to its minimal functions, that's when it reveals that it gets in what's probably a race condition with some part of ACPI.SYS. At some point, ACPI.SYS simply falls over and takes the whole PC down in a restart. And since the power cuts out instantly, nothing gets logged. It's like chasing a ghost.
    Motherboard: Maximus VIII Hero
    Processor: I7 6700K - 4.9GHz OC
    CPU Cooler: Corsair H80i v2
    Memory: G.Skill DDR4-3000 16GB
    Graphics: EVGA GTX 1080 FTW2 1721/1860MHz
    Storage #1: 1TB Western Digital Black
    Storage #2: 2TB Western Digital Black
    Case: Antec Nine Hundred
    Power Supply: Antec Edge 650 80+ Gold
    OS: Windows 10 Pro

  5. #5
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    This issue has already been discussed in another thread:
    https://rog.asus.com/forum/showthrea...th-AI-Suite-3/
    Last edited by Jaws_AT; 06-20-2016 at 11:32 AM.

  6. #6
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    Has anyone seen this problem after installing the Windows 10 Anniversary Update? So far I have not, it's been 3 days. Hopes are up!

  7. #7
    ROG Member Array CraYen PC Specs
    CraYen PC Specs
    Laptop (Model)Lenovo G500S
    MotherboardASUS Z170 Hero
    Processori7 6700k @4.5Ghz 1.24V
    Memory (part number)G. Skill RipJaws V 2x8GB 3000Mhz CL15
    Graphics Card #1Zotac 1070 AMP Extreme
    Sound CardAIM SC808 @2x LME49720NA + LM6172IN
    MonitorSamsung SyncMaster T190
    Storage #1Samsung SM951 256GB NVMe
    Storage #2WD Blue 1TB + Crucial MX200 500GB
    CPU CoolerBe Quiet! Dark Rock Pro 3
    CaseBe Quiet! Silent Base 800 Black @3x Be Quiet! SilentWings 2 120mm + 4x Be Quiet! SilentWings 2 140mm
    Power SupplyBe Quiet! Dark Power Pro P11 650W Platinum
    Keyboard ASUS Strix Tactic Pro
    Mouse ASUS Gladius
    Headset ASUS Strix Pro | HyperX Cloud v1
    Mouse Pad ASUS Strix Glide Control
    Headset/Speakers Ultrasone Pro 900
    OS Windows 10 x64 Home
    Network RouterTP-Link TL-WR1043N/ND v2 (Gargoyle)

    Join Date
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    Quote Originally Posted by Jaws_AT View Post
    Has anyone seen this problem after installing the Windows 10 Anniversary Update? So far I have not, it's been 3 days. Hopes are up!
    Hey,

    since it's been a while could you please tell us how's the situation?

  8. #8
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    Quote Originally Posted by CraYen View Post
    Hey,

    since it's been a while could you please tell us how's the situation?
    Yes... unfortunately it seems to have been just a lucky bunch of days after installing the anniversary update. This damn issue has started to come up again frequently since.
    So, one year in we are still waiting for this to get fixed.
    Anyone else still pestered by this? I don't really want to uninstall AI Suite as setting up the fans in the BIOS does not give me the flexibility I want. Like setting up fan curves for different sources (temperatures).

    Very upsetting!

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