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  1. #11
    ROG Guru: Orange Belt Array mpoffo PC Specs
    mpoffo PC Specs
    MotherboardRampage VI Extreme
    ProcessorIntel 7900x
    Memory (part number)G.Skill F4-3200C16Q-32GTZR = 32 GB 3200 Kit
    Graphics Card #1Nvidia Geforce 1080 FE
    Graphics Card #2Nvidia Geforce 1080 FE
    Sound CardSound Blaster Z
    MonitorNvidia Surround (5960 x 1080)
    Storage #1Samsung 840 Pro256 GB/850 Evo 500 GB
    Storage #2WD 2 TB & 4TB Black Hard Drives
    CPU CoolerCorsair H115i
    CaseCorsair 900D
    Power SupplyCorsair 1200i
    Keyboard Corsair K95 - RGB
    Mouse Corsair Glaive
    Headset Turtle Beach Surround
    Mouse Pad Corsair MM800 RGB Polaris
    Headset/Speakers Logitech 5.1 Surround THX Speakers
    OS Windows 10 Pro - 64 Bit
    Network RouterNetgear Nighthawk x10 R9000 w/ Plex
    Accessory #1 Corsair Comm. w/ Corsair HD Fans - NZXT Hue +
    Accessory #2 DX Racer King Series Chair
    Accessory #3 3D Printer/HTC VIVE
    mpoffo's Avatar
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    Quote Originally Posted by Brighttail View Post
    I have some answers on delidding a 7900x on the STICK BUILD thread.
    https://rog.asus.com/forum/showthrea...538#post680538
    Hmmm, thinking I will need to send mine in. How long did it take?
    RVIE X299 System:
    Windows 10 Prof 64-bit | Intel Core i9 7900x | ASUS Rampage VI Extreme | Corsair AX 1200i PSU
    Corsair 900D | 32 GB 3200 G.SKILL Trident RGB Series | EVGA GTX 1080 in SLI (x2) | Nvidia 2D Surround Set-up
    Samsung 840 PRO 256 GB | Samsung 850 EVO 500 GB | Intel 520 SATA SSD 240GB HD | 2 & 4 TB WD Black Hard Drive
    Creative Sound Blaster Z | Logitech THX 5.1 speaker setup

  2. #12
    ROG Guru: Brown Belt Array Brighttail PC Specs
    Brighttail PC Specs
    Laptop (Model)Asus G751JT
    MotherboardAsus x299 Rampage VI Extreme
    ProcessorIntel i9-7900x
    Memory (part number)Corsair Dominator Platinum SE 3200Mhz 4x8
    Graphics Card #1MSI GTX 1080TI
    MonitorAcer XB321HK (4k,IPS,G-sync)
    Storage #1Intel 900p (Boot) 2xSM961 (RAID 0) Games
    Storage #2Samsung 850 Pro 512GB - WD Black 4TB
    CPU CoolerCustom Water Cool
    CasePhanteks Enthoo Elite
    Power SupplyCorsair AX 1200i
    Keyboard Corsair Platinum 95
    Mouse Asus SPATHA
    Mouse Pad Corsair MM800
    Headset/Speakers Kanyo Y5
    OS Windows 10 64 bit
    Accessory #1 2 x Alphacool Full Copper Radiator 420mm/280mm
    Accessory #2 Monsoon MMRS reservoir w/ 2 x D5 Vario Pump
    Accessory #3 Monsoon Free Center Compression Fittings

    Join Date
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    Quote Originally Posted by mpoffo View Post
    Hmmm, thinking I will need to send mine in. How long did it take?
    3 days down, 1 day to delid/test/ 2 days back. Within 7 days.
    Panteks Enthoo Elite / Asus x299 Rampage VI Extreme / Intel I9-7900X / Corsair Dominator Platinum SE 4x8 3200MHz
    MSI GTX 1080 TI / 2x Intel 900p in a bootable VROC RAID 0 / Samsung 960 Pro 512GB
    Samsung 850 PRO 512GB / Western Digital Gold 8TB HD
    Corsair AX 1200i / Corsair Platinum K95 / Asus Spatha
    Acer XB321HK 4k, IPS, G-sync Monitor / Water Cooled / Asus G571JT Laptop

  3. #13
    New ROGer Array Skunkfoo PC Specs
    Skunkfoo PC Specs
    MotherboardASUS ROG Rampage VI Extreme
    Processori9 7940x
    Memory (part number)64 GB G.Skill 3733 RGB
    Graphics Card #1Titan Xp
    Graphics Card #2Titan Xp
    Monitor3x ASUS PG278QR
    CPU CoolerEK Monoblock
    CaseThermaltake Tower 900 Snow
    Power SupplyThermaltake Toughpower iRGB Plus 1250W
    Keyboard ASUS ROG Claymore
    Mouse ASUS ROG Galdius II
    Headset Apple Airpods
    Mouse Pad ASUS ROG Sheath
    OS Windows 10 Pro
    Network RouterASUS ROG

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    Max VID on 7940x???

    Quote Originally Posted by Inkar View Post
    Thanks. Skunkfoo has a 7940x too and is getting approximately the same results with the AIO he is using for testing before he makes his custom build.

    BTW, I'm guessing you didn't delid. Did you?
    Thanks for the mention. To recap:

    Test bench build:
    • Thermaltake AIO 360 Floe
    • NON Delidded
    • 4.6 GHz
    • 1.25 VID
    • Stablish but Fails on Aida64 Stress Test
    • hits thermal limit when stressed 90C+


    Tower 900 Custom Dual Loop build:
    • EK Monoblock, Enermax 400ml pump res, Black Ice Nemesis 560 GTX (CPU Only)
    • NON Delidded
    • 4.6 GHz
    • 1.25 VID
    • Very Stable passes all stress and benchmark tests
    • 70C-80C under load 27C-31C idle


    I tried 4.7 GHz at 1.275 and it would boot and run a few things but crash after a few minutes. I feel like I have room to push more voltage but I have no idea what a safe max voltage is. Can I go to 1.3 VID?

    Of note, when I ran XMP for my G.Skill 3733 kit at the default 4.4 turbo CPU ID and Aida64 reported a max of 1.322 VID!!! And it was typically 1.288 VID.

    Anyone have a reliable link that talks about max voltages for a i9 7940x?

  4. #14
    ROG Guru: Yellow Belt Array xarot PC Specs
    xarot PC Specs
    Laptop (Model)Asus GL702VM
    MotherboardAsus Rampage VI Extreme
    Processori9-7980XE
    Memory (part number)Corsair Dominator Platinum 64GB CL16-18-18
    Graphics Card #1Palit RTX2080TI
    Sound CardIntegrated
    MonitorAsus PG279Q
    Storage #1Intel 750 1.2 TB PCIe
    Storage #2Samsung 960 Pro 1 TB
    CPU CoolerDirect Die on EK Supremacy EVO Full Nickel
    CasePhanteks Enthoo Primo
    Power SupplyCorsair AX1500i
    Keyboard Blackstorm Mech RGB
    Mouse Steelseries Rival 310
    Headset Sennheiser HD555
    Mouse Pad Razer Goliathus Extended
    OS Windows 10 x64
    xarot's Avatar
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    Quote Originally Posted by Skunkfoo View Post
    Thanks for the mention. To recap:

    Test bench build:
    • Thermaltake AIO 360 Floe
    • NON Delidded
    • 4.6 GHz
    • 1.25 VID
    • Stablish but Fails on Aida64 Stress Test
    • hits thermal limit when stressed 90C+


    Tower 900 Custom Dual Loop build:
    • EK Monoblock, Enermax 400ml pump res, Black Ice Nemesis 560 GTX (CPU Only)
    • NON Delidded
    • 4.6 GHz
    • 1.25 VID
    • Very Stable passes all stress and benchmark tests
    • 70C-80C under load 27C-31C idle


    I tried 4.7 GHz at 1.275 and it would boot and run a few things but crash after a few minutes. I feel like I have room to push more voltage but I have no idea what a safe max voltage is. Can I go to 1.3 VID?

    Of note, when I ran XMP for my G.Skill 3733 kit at the default 4.4 turbo CPU ID and Aida64 reported a max of 1.322 VID!!! And it was typically 1.288 VID.

    Anyone have a reliable link that talks about max voltages for a i9 7940x?
    I guess nobody knows yet what is safe and what is not. I would stick to 1.25 max and I think you'll be safe if you don't push the chip with Prime95 or so using all threads? You could try Per Core Usage OC mode and set a higher multiplier to less amount of threads and see how it will run.
    Gaming: i9-7980XE H2O - Rampage VI Extreme - 64 GB Corsair Dominator Platinum DDR4-3200 - Palit RTX2080TI H2O - Phanteks Enthoo Primo - Corsair AX1500i - Intel 750 1.2 TB - Samsung 960 PRO 1 TB
    HTPC: i7-6950X - X99-M WS - 32 GB G.Skill RipjawsV DDR4-2400 - GTX1070 - Bitfenix Pandora - Corsair AX860 - Intel 750 400 GB + Samsung 1 TB 850 EVO
    All around: i7-9900X H2O - Rampage VI Extreme - 64 GB G.Skill 4000 CL18-19-19-39 - Strix RTX2060 - In Win 101C - Samsung 960 EVO 512 GB

  5. #15
    New ROGer Array Skunkfoo PC Specs
    Skunkfoo PC Specs
    MotherboardASUS ROG Rampage VI Extreme
    Processori9 7940x
    Memory (part number)64 GB G.Skill 3733 RGB
    Graphics Card #1Titan Xp
    Graphics Card #2Titan Xp
    Monitor3x ASUS PG278QR
    CPU CoolerEK Monoblock
    CaseThermaltake Tower 900 Snow
    Power SupplyThermaltake Toughpower iRGB Plus 1250W
    Keyboard ASUS ROG Claymore
    Mouse ASUS ROG Galdius II
    Headset Apple Airpods
    Mouse Pad ASUS ROG Sheath
    OS Windows 10 Pro
    Network RouterASUS ROG

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    4.7 All Cores at 1.282 VID and 1.78 Input

    Quote Originally Posted by xarot View Post
    I guess nobody knows yet what is safe and what is not. I would stick to 1.25 max and I think you'll be safe if you don't push the chip with Prime95 or so using all threads? You could try Per Core Usage OC mode and set a higher multiplier to less amount of threads and see how it will run.
    I settled at 4.7 All Cores @ 1.282 VID and 1.78 Input with G.Skill 3733 MHz Kit running at 3600 MHz and everything looks stable to me. I never liked Prime95 as its would be to stressful to see 14 cores shoot into the upper 80C range and push into 90C.

    I ran countless 3DMark FireStrike and TimeSpy with no issues (Made it into the Top 75 Hall of Fame!!!). I would have just left it at 4.6 GHz @ 1.25 but for some strange reason 4.7 appears so much faster (and I really don't think it is in my head... Windows loads several seconds faster with and startup apps finish loading several seconds faster as well.

    I'm stopping at 4.7 until it becomes a consensus that 1.3 or above is ok and I will try for 4.8.

  6. #16
    ROG Guru: Brown Belt Array Brighttail PC Specs
    Brighttail PC Specs
    Laptop (Model)Asus G751JT
    MotherboardAsus x299 Rampage VI Extreme
    ProcessorIntel i9-7900x
    Memory (part number)Corsair Dominator Platinum SE 3200Mhz 4x8
    Graphics Card #1MSI GTX 1080TI
    MonitorAcer XB321HK (4k,IPS,G-sync)
    Storage #1Intel 900p (Boot) 2xSM961 (RAID 0) Games
    Storage #2Samsung 850 Pro 512GB - WD Black 4TB
    CPU CoolerCustom Water Cool
    CasePhanteks Enthoo Elite
    Power SupplyCorsair AX 1200i
    Keyboard Corsair Platinum 95
    Mouse Asus SPATHA
    Mouse Pad Corsair MM800
    Headset/Speakers Kanyo Y5
    OS Windows 10 64 bit
    Accessory #1 2 x Alphacool Full Copper Radiator 420mm/280mm
    Accessory #2 Monsoon MMRS reservoir w/ 2 x D5 Vario Pump
    Accessory #3 Monsoon Free Center Compression Fittings

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    I don't know max safe voltage, because personally I think you'll run into a heat issue before you reach that voltage, especially with that many cores. That being said, I know places like Silicon Lottery keeps all of its HCC x299s max at 1.25v for full stress testing. I think there is room to go above that for normal every day computing/gaming but I wouldn't personally want to go much above that on a 24/7 cycle.
    Panteks Enthoo Elite / Asus x299 Rampage VI Extreme / Intel I9-7900X / Corsair Dominator Platinum SE 4x8 3200MHz
    MSI GTX 1080 TI / 2x Intel 900p in a bootable VROC RAID 0 / Samsung 960 Pro 512GB
    Samsung 850 PRO 512GB / Western Digital Gold 8TB HD
    Corsair AX 1200i / Corsair Platinum K95 / Asus Spatha
    Acer XB321HK 4k, IPS, G-sync Monitor / Water Cooled / Asus G571JT Laptop

  7. #17
    New ROGer Array Skunkfoo PC Specs
    Skunkfoo PC Specs
    MotherboardASUS ROG Rampage VI Extreme
    Processori9 7940x
    Memory (part number)64 GB G.Skill 3733 RGB
    Graphics Card #1Titan Xp
    Graphics Card #2Titan Xp
    Monitor3x ASUS PG278QR
    CPU CoolerEK Monoblock
    CaseThermaltake Tower 900 Snow
    Power SupplyThermaltake Toughpower iRGB Plus 1250W
    Keyboard ASUS ROG Claymore
    Mouse ASUS ROG Galdius II
    Headset Apple Airpods
    Mouse Pad ASUS ROG Sheath
    OS Windows 10 Pro
    Network RouterASUS ROG

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    Back to 4.6 GHz

    Quote Originally Posted by Skunkfoo View Post
    I settled at 4.7 All Cores @ 1.282 VID and 1.78 Input with G.Skill 3733 MHz Kit running at 3600 MHz and everything looks stable to me. I never liked Prime95 as its would be to stressful to see 14 cores shoot into the upper 80C range and push into 90C.

    I ran countless 3DMark FireStrike and TimeSpy with no issues (Made it into the Top 75 Hall of Fame!!!). I would have just left it at 4.6 GHz @ 1.25 but for some strange reason 4.7 appears so much faster (and I really don't think it is in my head... Windows loads several seconds faster with and startup apps finish loading several seconds faster as well.

    I'm stopping at 4.7 until it becomes a consensus that 1.3 or above is ok and I will try for 4.8.
    I just backed it back down to 4.6GHz @1.25 & 3600 MHz RAM.

    I had no problems at 4.7 until I tried a RealBench benchmark (H.264 encoding). It froze my system. After the freeze I took the time to try to go from manual OC to adaptive and I thought I bricked my Mobo. My bios would lock up after 10 seconds of entering the Bios. What I had to do was load a known stable profile within 10 seconds and load and start up the system. It was the longest hour of my life.

    I've never had any good luck with Adaptive

  8. #18
    New ROGer Array Skunkfoo PC Specs
    Skunkfoo PC Specs
    MotherboardASUS ROG Rampage VI Extreme
    Processori9 7940x
    Memory (part number)64 GB G.Skill 3733 RGB
    Graphics Card #1Titan Xp
    Graphics Card #2Titan Xp
    Monitor3x ASUS PG278QR
    CPU CoolerEK Monoblock
    CaseThermaltake Tower 900 Snow
    Power SupplyThermaltake Toughpower iRGB Plus 1250W
    Keyboard ASUS ROG Claymore
    Mouse ASUS ROG Galdius II
    Headset Apple Airpods
    Mouse Pad ASUS ROG Sheath
    OS Windows 10 Pro
    Network RouterASUS ROG

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    Jay2Cents says ASUS says 1.275

    At 17:30 of his videos listen to what he says ASUS told him. This is for his 7980XE

    https://www.youtube.com/watch?v=GJ1M3Gubbi8

  9. #19
    ROG Guru: Brown Belt Array Brighttail PC Specs
    Brighttail PC Specs
    Laptop (Model)Asus G751JT
    MotherboardAsus x299 Rampage VI Extreme
    ProcessorIntel i9-7900x
    Memory (part number)Corsair Dominator Platinum SE 3200Mhz 4x8
    Graphics Card #1MSI GTX 1080TI
    MonitorAcer XB321HK (4k,IPS,G-sync)
    Storage #1Intel 900p (Boot) 2xSM961 (RAID 0) Games
    Storage #2Samsung 850 Pro 512GB - WD Black 4TB
    CPU CoolerCustom Water Cool
    CasePhanteks Enthoo Elite
    Power SupplyCorsair AX 1200i
    Keyboard Corsair Platinum 95
    Mouse Asus SPATHA
    Mouse Pad Corsair MM800
    Headset/Speakers Kanyo Y5
    OS Windows 10 64 bit
    Accessory #1 2 x Alphacool Full Copper Radiator 420mm/280mm
    Accessory #2 Monsoon MMRS reservoir w/ 2 x D5 Vario Pump
    Accessory #3 Monsoon Free Center Compression Fittings

    Join Date
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    Quote Originally Posted by Skunkfoo View Post
    At 17:30 of his videos listen to what he says ASUS told him. This is for his 7980XE

    https://www.youtube.com/watch?v=GJ1M3Gubbi8
    Yeah I figured 1.275 was the upper limit if you just needed that last .025 to get it stable.
    Panteks Enthoo Elite / Asus x299 Rampage VI Extreme / Intel I9-7900X / Corsair Dominator Platinum SE 4x8 3200MHz
    MSI GTX 1080 TI / 2x Intel 900p in a bootable VROC RAID 0 / Samsung 960 Pro 512GB
    Samsung 850 PRO 512GB / Western Digital Gold 8TB HD
    Corsair AX 1200i / Corsair Platinum K95 / Asus Spatha
    Acer XB321HK 4k, IPS, G-sync Monitor / Water Cooled / Asus G571JT Laptop

  10. #20
    Administrator Array Silent Scone@ASUS's Avatar
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    I've just picked up a 7940X and using heavy custom water, I'll let you know how I get on. It's a fairly disregarded SKU due being in the middle of the pack. I'd be happy with 4.6, anything above this is a bonus. As for self imposed voltage limits, I wouldn't stray over 1.3v for light workloads (non AVX). 1.25v for high current workloads

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