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  1. #1
    New ROGer Array
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    Issue Overclocking Memory

    UEFI Version: 1502

    CPU: i7-5930k

    Memory: G.SKILL Ripjaws 4 64GB (8 x 8GB) DDR4 2800 (PC4-22400)

    GPU: EVGA GeForce GTX 980 Ti SC+ w/ACX BP (1102MHz)

    SSD/HDDs/Optical drives: 2xSAMSUNG 850 PRO 512GB (RAID 1) + 1×SAMSUNG 850 EVO 1TB (scratch disk)
    (I have 4 x WD BLACK SERIES WD4003FZEX 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" SSDs I intend to install in RAID 5 once I can get the system stable)

    PSU: CORSAIR AX1500i

    USB Devices (model/version number): a dell keyboard

    Monitor: an old dell 1920x1080 lcd (SAMSUNG U28E590D still in route)

    CPU Cooler: Corsair Hydro Series™ H100i GTX

    PC CASE: Corsair Graphite Series 760T

    Operating system: Windows 8.1 (Activated)

    Drivers Installed (include version):

    Intel Chipset
    Intel LAN
    GeForce Game Ready
    Bluetooth - WiFi

    Any third Party temp/voltage software installed: No

    System Overclocked (provide details)?

    Ai Overclock Tuner: MANUAL
    CPU Strap: 100 MHz
    BLCK Frequency: 100 MHz
    CPU Core Ratio: 42
    DRAM Frequency: DDR4-2200 MHz
    CPU Core Voltage: 1.25v
    CPU System Agent Voltage: 1.021875v

    DRAM Timings: 15-16-16-35-2T
    DRAM Eventual Voltage (ALL): 1.25V


    ISSUE:
    The above settings seem to work and are stable for me.
    Once I switch to using the XMP profile for overclocking my RAM my system stability goes out the window. More precisely, The system POSTs and boots into Windows but then freezes anywhere from one minute to five minutes. The only thing I have open on the desktop is the Date and Time settings so I can easily track how long it takes to freeze.

    XMP Settings (only listing changes from above):

    CPU Strap: 125 MHz
    BLCK Frequency: 127.3 MHz
    CPU Core Ratio: 24
    DRAM Frequency: DDR4-2800 MHz

    I have tried various CPU Core Voltages w/o much effect/difference: 1.00v -> 1.45v in 0.05v steps.
    This is the first system I've built since 2001 so am a little out of touch and uncertain to the root cause. I'm not sure whether I should adjust the CPU Core Voltage even more, the SAV, or yet some other setting. I'm working under the assumption all h/w in use is fine (fingers corssed). Any sage advice or help would be gratefully appreciated ...

  2. #2
    ROG Guru: White Belt Array jacks12345 PC Specs
    jacks12345 PC Specs
    MotherboardASUS Rampage V Extreme
    ProcessorIntel i7-5960X
    Memory (part number)32GB G.Skill Ripjaws V DDR4-3000 CL15 (F4-3000C15Q-32GVR)
    Graphics Card #1GTX Titan X (Pascal)
    Graphics Card #2GTX Titan X (Pascal)
    Sound CardCreative Sound Blaster Zx
    MonitorASUS ROG Swift PG278Q 144hz 1440p G-Sync
    Storage #12x (RAID 0) Intel 730 Series 480GB SSD
    Storage #2Crucial MX100 512GB SSD
    CPU CoolerCooler Master Nepton 280L
    CaseCorsair Carbide Air 540 (Silver)
    Power SupplyEVGA SuperNOVA 1300W 80+ Gold
    Keyboard G.SKILL RIPJAWS KM780 RGB Mechanical Gaming Keyboard - Cherry MX Red Switches
    Mouse G.SKILL RIPJAWS MX780 USB Wired RGB Laser Gaming Mouse
    OS Windows 10 Pro 64-bit
    Accessory #1 ASUS BC-12B1ST/BLK/B/AS
    jacks12345's Avatar
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    64GB using all eight slots at 2800Mhz would put extreme stress on your CPU's IMC. You will probably have to leave your CPU frequency and voltage at normal/default for now, and adjust the System Agent (SA) voltage until you achieve stability. Your SA voltage looks low for that memory configuration. I would up your SA voltage my 0.01v until you get your system stable, and then you can adjust your CPU settings.
    CPU: Intel i7-5960X
    CPU Cooler: Cooler Master Nepton 280L
    RAM: 32GB G.Skill Ripjaws V DDR4-3000 CL15
    Motherboard: ASUS Rampage V Extreme
    CD/BR Drive: ASUS BC-12B1ST/BLK/B/AS
    GPU: 2x (SLI) GTX Titan X (Pascal)
    Sound: Creative Sound Blaster Zx
    SSD: (RAID 0) 2x Intel 730 Series 480GB
    SSD: (backup) Crucial MX100 512GB
    Case: Corsair Carbide Air 540 (Silver)
    PSU: EVGA SuperNOVA 1300W 80+ Gold
    Monitor: ASUS ROG Swift PG278Q 144hz 1440p G-Sync
    OS: Windows 10 Pro 64-bit

  3. #3
    ROG Guru: Grand Master Array
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    Is that a single 64GB kit? Or are you combining multiple smaller capacity kits together?

  4. #4
    ROG Guru: White Belt Array jacks12345 PC Specs
    jacks12345 PC Specs
    MotherboardASUS Rampage V Extreme
    ProcessorIntel i7-5960X
    Memory (part number)32GB G.Skill Ripjaws V DDR4-3000 CL15 (F4-3000C15Q-32GVR)
    Graphics Card #1GTX Titan X (Pascal)
    Graphics Card #2GTX Titan X (Pascal)
    Sound CardCreative Sound Blaster Zx
    MonitorASUS ROG Swift PG278Q 144hz 1440p G-Sync
    Storage #12x (RAID 0) Intel 730 Series 480GB SSD
    Storage #2Crucial MX100 512GB SSD
    CPU CoolerCooler Master Nepton 280L
    CaseCorsair Carbide Air 540 (Silver)
    Power SupplyEVGA SuperNOVA 1300W 80+ Gold
    Keyboard G.SKILL RIPJAWS KM780 RGB Mechanical Gaming Keyboard - Cherry MX Red Switches
    Mouse G.SKILL RIPJAWS MX780 USB Wired RGB Laser Gaming Mouse
    OS Windows 10 Pro 64-bit
    Accessory #1 ASUS BC-12B1ST/BLK/B/AS
    jacks12345's Avatar
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    Ya, I forgot to ask that. Combining kits is a big no-no, especially at that frequency. I learned this the hard way.

    Quote Originally Posted by Chino View Post
    Is that a single 64GB kit? Or are you combining multiple smaller capacity kits together?
    CPU: Intel i7-5960X
    CPU Cooler: Cooler Master Nepton 280L
    RAM: 32GB G.Skill Ripjaws V DDR4-3000 CL15
    Motherboard: ASUS Rampage V Extreme
    CD/BR Drive: ASUS BC-12B1ST/BLK/B/AS
    GPU: 2x (SLI) GTX Titan X (Pascal)
    Sound: Creative Sound Blaster Zx
    SSD: (RAID 0) 2x Intel 730 Series 480GB
    SSD: (backup) Crucial MX100 512GB
    Case: Corsair Carbide Air 540 (Silver)
    PSU: EVGA SuperNOVA 1300W 80+ Gold
    Monitor: ASUS ROG Swift PG278Q 144hz 1440p G-Sync
    OS: Windows 10 Pro 64-bit

  5. #5
    New ROGer Array
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    The memory is a single kit

    I bought: this

  6. #6
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    Quote Originally Posted by jacks12345 View Post
    64GB using all eight slots at 2800Mhz would put extreme stress on your CPU's IMC. You will probably have to leave your CPU frequency and voltage at normal/default for now, and adjust the System Agent (SA) voltage until you achieve stability. Your SA voltage looks low for that memory configuration. I would up your SA voltage my 0.01v until you get your system stable, and then you can adjust your CPU settings.
    Would that be a likely candidate for my system freezing?
    At what voltage should I consider a top limit here?

  7. #7
    ROG Guru: White Belt Array jacks12345 PC Specs
    jacks12345 PC Specs
    MotherboardASUS Rampage V Extreme
    ProcessorIntel i7-5960X
    Memory (part number)32GB G.Skill Ripjaws V DDR4-3000 CL15 (F4-3000C15Q-32GVR)
    Graphics Card #1GTX Titan X (Pascal)
    Graphics Card #2GTX Titan X (Pascal)
    Sound CardCreative Sound Blaster Zx
    MonitorASUS ROG Swift PG278Q 144hz 1440p G-Sync
    Storage #12x (RAID 0) Intel 730 Series 480GB SSD
    Storage #2Crucial MX100 512GB SSD
    CPU CoolerCooler Master Nepton 280L
    CaseCorsair Carbide Air 540 (Silver)
    Power SupplyEVGA SuperNOVA 1300W 80+ Gold
    Keyboard G.SKILL RIPJAWS KM780 RGB Mechanical Gaming Keyboard - Cherry MX Red Switches
    Mouse G.SKILL RIPJAWS MX780 USB Wired RGB Laser Gaming Mouse
    OS Windows 10 Pro 64-bit
    Accessory #1 ASUS BC-12B1ST/BLK/B/AS
    jacks12345's Avatar
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    It's very possible.

    Two things, based on your post, that would probably be causing the system to freeze:

    1. CPU frequency is not getting enough voltage.
    2. Your CPU's IMC (memory controller) is having a hard time handling the memory.

    This is what I would do. Perform a CMOS reset, turn power off on your computer and hold the power button in for 20~ seconds and plug it back in. Set AI Tuner to XMP and see what happens. If your system still freezes, up the voltage on your CPU by 0.01v, but make sure to leave the frequency at the at the default speed.

    If you CPU voltage is not the issue, up the System Agent voltage by 0.01v and test. Keep doing this until your system stabilizes. With my kit, my SA voltage is at 1.17v. G.Skill has stated that some systems require up to 1.3v of SA voltage, but I personally wouldn't go above 1.2v SA voltage unless you absolutely must.

    If none of those works, take out all your DRAM sticks and put one in at a time (make sure you insert the stick in the correct slot; you may have to refer to the manual). Keep doing this until your system freezes again or you get the system to work. This will tell you if you have a bad memory module or if your CPU is having difficulty handling your memory configuration.
    Last edited by jacks12345; 08-15-2015 at 12:06 AM.
    CPU: Intel i7-5960X
    CPU Cooler: Cooler Master Nepton 280L
    RAM: 32GB G.Skill Ripjaws V DDR4-3000 CL15
    Motherboard: ASUS Rampage V Extreme
    CD/BR Drive: ASUS BC-12B1ST/BLK/B/AS
    GPU: 2x (SLI) GTX Titan X (Pascal)
    Sound: Creative Sound Blaster Zx
    SSD: (RAID 0) 2x Intel 730 Series 480GB
    SSD: (backup) Crucial MX100 512GB
    Case: Corsair Carbide Air 540 (Silver)
    PSU: EVGA SuperNOVA 1300W 80+ Gold
    Monitor: ASUS ROG Swift PG278Q 144hz 1440p G-Sync
    OS: Windows 10 Pro 64-bit

  8. #8
    ROG Guru: Grand Master Array
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    Quote Originally Posted by OregonMike View Post
    The memory is a single kit

    I bought: this
    Correct.

    Clear your CMOS to bring your CPU and memory back to stock defaults. Does your system still freeze during operation?

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