Results 1 to 7 of 7
  1. #1
    New ROGer Array NostalgiaBytes PC Specs
    NostalgiaBytes PC Specs
    MotherboardAsus Maximus VIII Hero Intel Z170 (Socket 1151) DDR4 ATX Motherboard
    ProcessorIntel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor
    Memory (part number)Corsair Vengeance LPX 32GB (2x16GB) DDR4 PC4-24000C15 3000MHz (CMK32GX4M2B3)
    Graphics Card #1Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Graphics Card #2Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Sound CardCreative Sound Blaster Z High Performance Gaming Sound Card
    Storage #1Samsung 250GB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    Storage #2Samsung 1.0TB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    CPU CoolerCorsair Hydro H55 Quiet Liquid CPU Cooler
    CaseNZXT Source 340 Midi-Tower Case Special Edition
    Power SupplyEVGA SuperNova G2 1300W '80 Plus Gold' Modular Power Supply
    OS Windows 10 Pro 64bit
    Accessory #1 TP-Link Archer T9E AC1900 Wireless Dual Band PCI Express Adapter

    Join Date
    Aug 2016
    Reputation
    10
    Posts
    3

    Asus Maximus Hero VIII /w Asus Geforce GTX 1080's in SLI

    Hey All,

    First time poster here, hope you're all well, and I'm hoping you'll be able to help me with an unusual issue I've been having of late too. So my system specs should be in my profile, If you cant see them ill update this thread as necessary. Anyway onto the problem -

    I built my system about three weeks ago, hadnt had any issues baring the fairly common memory not working on XMP etc, thankfully resolved with the release of Bios 1902. It's been working perfectly effectively. That is, until I installed my secound Asus Founders Edition Geforce GTX 1080. I now find my self in a situation where for some inexplicable reason my CPU will throttle to 800Mhz and stay there. This can happen 20 minutes after boot, or work perfectly for 5 hours (tested with stop watch, OCD me). But when it does throttle down to 800Mhz, it wont budge from 100 x 8.0 (800Mhz) no matter what I try to do within windows once its happend. It can occur if the machie is left idling all day, or even in games and applications, it has no ryhme or reason it seems.

    I have to perform a shut down and reboot, and low and behold, its fine again. She'll trundle along happily, working, until the random afflication occurs again, which is anytime, sometimes not at all.

    If I yank out the second 1080 GTX, well, all is well again, tested with the machine on 3 days straight. If I swap the first card out and run on just the second card (incase a fault with that card) again, no problems.

    As for the various other things I've tried - I've tested with C-States and Intel Speed Step disabled. No Dice. Problem still rears its ugly head.

    So I'm at abit of loss as to what the problem might be, after all, if i pull the second GTX the PC is fine, so what would I RMA the CPU? The motherboard? Is it a case of the Hero VIII cant handle every PCI slot being filled, particularly with two 1080's and an AC1900 wifi card, soundcard etc. Or cant the CPU handle two 1080s? I feel like this all should work together, but if i need to upgrade to the Alpha or Extreme I will, just want advice, help before I head down that route.

    Thanks for any help and guidance you can give me on this, it's very much appreciated.
    Last edited by NostalgiaBytes; 08-04-2016 at 03:10 PM.

  2. #2
    ROG Guru: Brown Belt Array MeanMachine PC Specs
    MeanMachine PC Specs
    Laptop (Model)I enjoy my wife
    MotherboardCVI HERO + CVII Hero Wifi
    ProcessorRyzen 7 1800X + 2700X
    Memory (part number)CMD16GX4M2B3000C15 + F4-3200C14D-16GTZR
    Graphics Card #1EVGA GTX980 SC for CVFZ
    Graphics Card #2EVGA GTX 1080 hybrid
    Graphics Card #3GTX 770 for phys x
    Sound CardMB
    MonitorHP w2408h
    Storage #1Samsung 970 EVO 500GB M.2
    Storage #2Samsung 840EVO 500GB and 960 M.2 pro
    CPU CoolerCorsair H105, H110 and H115i
    CaseCorsair 750D and 780T
    Power SupplyCorsair AX-1200i and Antec 850 pro platinum
    Keyboard Logitech K800
    Mouse Razer Mamba
    Headset Corsair Vengeance 2100
    OS W7 Ultimate 64bit and W10 pro 64bit
    Network RouterNetcom Wireless NF18ACV
    MeanMachine's Avatar
    Join Date
    Apr 2014
    Reputation
    126
    Posts
    1,687

    You should conduct a series of stress tests for instability using AIDA64 to determine Voltages and temperatures whilst under load.
    Also download HWMonitor and put them on your desktop side by side.
    This way you can look for Vdroop and max Temps in HWMonitor whilst the test are being run on CPU and FPU.
    You can also individually test your GPU cards with AIDA64 and Your DIMMs.

    Have you OC your CPU or made any changes in Bios from default. ?

    I'm a little concerned regarding the H55 being able to cool efficiently.
    Last edited by MeanMachine; 08-05-2016 at 02:02 AM.
    We owe our existence to the scum of the earth, Cyanobacteria

    My System Specs:

    MB:ASUS ROG Crosshair VII Hero/WiFi GPU:EVGA GTX 1080 sc PSU:Corsair AX-1200i
    CPU:
    AMD R7 2700X Cooler: Corsair Hydro H115i Case: Corsair Carbide 780t

    Memory:G.Skill TridentZ F4-3200C14D-16GTZR SSD:Samsung 500GB 960 EVO M.2



  3. #3
    New ROGer Array NostalgiaBytes PC Specs
    NostalgiaBytes PC Specs
    MotherboardAsus Maximus VIII Hero Intel Z170 (Socket 1151) DDR4 ATX Motherboard
    ProcessorIntel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor
    Memory (part number)Corsair Vengeance LPX 32GB (2x16GB) DDR4 PC4-24000C15 3000MHz (CMK32GX4M2B3)
    Graphics Card #1Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Graphics Card #2Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Sound CardCreative Sound Blaster Z High Performance Gaming Sound Card
    Storage #1Samsung 250GB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    Storage #2Samsung 1.0TB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    CPU CoolerCorsair Hydro H55 Quiet Liquid CPU Cooler
    CaseNZXT Source 340 Midi-Tower Case Special Edition
    Power SupplyEVGA SuperNova G2 1300W '80 Plus Gold' Modular Power Supply
    OS Windows 10 Pro 64bit
    Accessory #1 TP-Link Archer T9E AC1900 Wireless Dual Band PCI Express Adapter

    Join Date
    Aug 2016
    Reputation
    10
    Posts
    3

    Hey, I've got HWMonitor and CPUZ set to load at start up, idle temps of the CPU are 19 - 25c depending on ambient temps (live in Uk) load temps whilst running real bench, max out between 65c and 70c

    I'm nigh on 99.9% sure its not a temprature issue due to the fact, if I yank the second GPU, running the rig on just one of the 1080's (doesnt matter which) the system works happily, all day every day.

    Also I dont believe the extra GPU appears to put any extra load on the CPU specifically, if it does, voltages, temps dont appear to show any difference. Now as for the PCI Lanes which are full, well thats a different story.

    It's a weird one that's for sure, and at the moment I'm running my shiny new machine minus one of its £600 components, which is abit frustrating.

    I'm gonna run some more tests over the weekend, but I think its heading towards me replacing it with a more competant motherboard. Thinking either the Alpha or Extreme. Utilise the Hero in a smaller less demanding setup.

  4. #4

  5. #5
    ROG Guru: Brown Belt Array NemesisChild PC Specs
    NemesisChild PC Specs
    MotherboardASUS Maximus X Hero (WI-FI AC)
    ProcessorIntel i7 8700K
    Memory (part number)G.Skill F4-3600C16D-16GTZR
    Graphics Card #1Nvidia GTX 1070 Ti FE
    Graphics Card #2Nvidia GTX 1070 Ti FE
    MonitorASUS ROG Swift PG278Q
    Storage #1Samsung 970 PRO 512GB NVMe M.2
    Storage #2WD Black 2TB 7200 RPM 64MB Cache
    CPU CoolerNZXT Kraken X42
    CaseCooler Master HAF 932 Advanced
    Power SupplyEVGA SuperNova 1200 P2
    Keyboard Logitech G910 Orion Spark
    Mouse Logitech G703 Wireless
    Headset Logitech G Pro
    Mouse Pad SteelSeries
    OS Windows 10 Home x64 (UEFI)
    Network RouterLinksys WRT1900AC
    NemesisChild's Avatar
    Join Date
    Sep 2011
    Reputation
    89
    Posts
    1,788

    Have you tried reverting the bios to default settings and testing it from there? Or cleared the CMOS lately?

    Running SLI in a mid-size case with a H55 cooler....I think you have a CPU heat throttling issue.
    Intel i7 8700K@ 5.2GHz (Delidded)
    ASUS Maximus X Hero (Bios 1801)
    NZXT Kraken X42
    G.Skill TridentZ@ 4000MHz CL16 2x8GB
    SLI: 2x Nvidia GTX 1070 Ti FE@ 2025/2025MHz
    OS: Samsung 970 PRO 512GB NVMe M.2
    Storage: Samsung 960 EVO 500GB NVMe M.2
    Storage: 2x Samsung 850 EVO 500GB
    Storage: WD Black 7200 RPM 64MB Cache 2TB
    EVGA SuperNova 1200 P2
    Cooler Master HAF 932 Advanced

  6. #6
    New ROGer Array NostalgiaBytes PC Specs
    NostalgiaBytes PC Specs
    MotherboardAsus Maximus VIII Hero Intel Z170 (Socket 1151) DDR4 ATX Motherboard
    ProcessorIntel Core i7-6700K 4.0GHz (Skylake) Socket LGA1151 Processor
    Memory (part number)Corsair Vengeance LPX 32GB (2x16GB) DDR4 PC4-24000C15 3000MHz (CMK32GX4M2B3)
    Graphics Card #1Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Graphics Card #2Asus GeForce GTX 1080 "Founders Edition" 8192MB GDDR5X PCI-Express Graphics Card
    Sound CardCreative Sound Blaster Z High Performance Gaming Sound Card
    Storage #1Samsung 250GB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    Storage #2Samsung 1.0TB 850 EVO SSD 2.5" SATA 6Gbps 32 Layer 3D V-NAND Solid State Drive
    CPU CoolerCorsair Hydro H55 Quiet Liquid CPU Cooler
    CaseNZXT Source 340 Midi-Tower Case Special Edition
    Power SupplyEVGA SuperNova G2 1300W '80 Plus Gold' Modular Power Supply
    OS Windows 10 Pro 64bit
    Accessory #1 TP-Link Archer T9E AC1900 Wireless Dual Band PCI Express Adapter

    Join Date
    Aug 2016
    Reputation
    10
    Posts
    3

    So following a weekend of rigorous testing, think the issue lies with the motherboard, can’t explain it otherwise.

    I've ruled out temperature, for two main reasons, running the rig with the side panels off, in my offices comms room has the entire rig running at a frigid 17c and 28c maximum under load. Also if the rig is left in a powered down (soft off) state overnight and you turn it on next day (so powered down for several hours), it will load with the CPU throttle locked to 800Mhz. If I was to flick the rocker or disable c-state, ErP modes it boots just fine. However as stated before, it'll throttle lock to 800mhz anywhere from a few minutes after boot to several hours. Other issues I've noted is just a general shaky level of stability, USB devices disconnect and reconnect randomly when two cards are installed, exiting 3D applications, sometimes cause the system to freak out and grind the desktop to a crawl.

    The only common theme, is that if I yank that second GPU, the entire system operates normally, in fact id even go so far as to say it’s faster, smoother.

    In summary though, with a second GPU installed, it doesn’t appear to matter how or what I try, it eventually flakes out. Be that the system with just two GPU's and nothing in any other PC Slot, running one 16Gb dimm as opposed to two, or running with optimise defaults or customised settings in the BIOS.

    The fact from a soft off boot it will without fail, every time, lock to 800mhz even if the CPU temp never went above 20c from cold boot - but I do the same with one GPU its fine, after all my testing the only thing I can think, is there something iffy with the board, but it only appears when it's asked to run two GPU. So I'm thinking maybe the best course of action is to replace it with a different series, was thinking trying the Sabretooth Mark 1 unless anyone has reason to avoid that board. I dont see a reason to RMA the VIII Hero board when I can utilise it elsewhere as long I ensure I dont use it for SLI. Just hope this finally resolves the issue. Because after replacing the PSU (after thinking it was a power issue) trying everthing I can think of, I'm getting abit tired of it now.
    Last edited by NostalgiaBytes; 08-08-2016 at 08:01 AM.

  7. #7
    ROG Enthusiast Array Subsider PC Specs
    Subsider PC Specs
    MotherboardMaximus Hero Alpha
    Processor6700k
    Memory (part number)F4-3200C14D-16GTZ
    Graphics Card #1Evga 1080 Gtx
    Monitor2x Asus 24" 2ms
    Storage #1M.2 950 Pro
    Storage #2Evo 850
    CPU Coolerold school Water
    CaseLian Li v2000b
    Power SupplySesasonic 1050
    Keyboard G15
    Mouse G5
    OS Win 10
    Network RouterAC1750
    Subsider's Avatar
    Join Date
    May 2016
    Reputation
    10
    Posts
    37

    did you try running the High Performance profile for your Power Plan as Chino suggested ? are you using a UPS ?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •