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  1. #1
    ROG Guru: Orange Belt Array
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    5960x 4.8 @ 1.3v / 5.0 @ 1.35v (not kidding)

    Never hurts to go over your system with a fine-tooth comb... I found my PWM EK pump voltages were way off as I had tuned the wrong thing in the BIOS (I had hooked up the pump control to 4 and the fans for the radiator to 1 and then tuned 1 as if it were the pump).

    That wasn't the only issue I found, nor can it fully explain this. Short run-down of issues and possible impact:
    - water pump was nearly off/off at any temp short of 75C (and still remarkably effective - but temps are much narrower core-to-core now)

    - all fans were running harder than they needed to be (there are 12 fans, 3 140mm, 3 200mm), meaning they were drawing current and inserting noise I am sure through the MB

    - random PCIe conflicts with M.2 and 10GbE card (PCIe lanes all busy - SLI x16x2 + 10GbE + m.2). Solved by using hyper card instead of m.2

    So, with that all out of the way:
    1. ~10 minutes of aida64 at 4.8 @ 1.3v (it eventually found instability, but look at those temps?)
    2. 5GHz club
    Miniatura de Adjuntos Miniatura de Adjuntos 5.0_1,35.png  

    ridiculous.png  


  2. #2
    !@#$ you, CPU! Array Gobe PC Specs
    Gobe PC Specs
    MotherboardAsus Rampage V Extreme/U3.1
    ProcessorIntel Core i7 5960X
    Memory (part number)G.Skill Ripjaws V 32GB Quad 3200 14-14-14-34
    Graphics Card #1Asus STRIX-GTX970-DC2OC-4GD5
    Graphics Card #2Asus STRIX-GTX970-DC2OC-4GD5
    Storage #1Samsung 950 Pro m.2 NVMe 512 Gb
    Storage #2Samsung 950 Pro m.2 NVMe 512 Gb
    CPU CoolerPhobya UC-2 LT w/Phobya DC12-400 pump w/Phobya G-Changer 360mm & Phobya Xtreme 200 V.2 radiators
    CaseCorsair 750D Airflow Edition - Want BIGGER!
    Power SupplySeaSonic X-1250
    Keyboard Vintage (1989) IBM Model M Clicky 'cuz I'm old (PN: 1390131) Bolt-Modded
    Mouse The cat kills 'em, the dog kills the rats and possums, racoons are a problem. Life in the country!
    OS Windows 7 Professional 64 Bit
    Network RouterDon't remember; don't care.
    Accessory #1 Ice bucket for the Phobya Xtreme 200 V.2 Radiator
    Accessory #2 Caffeinated beverage du jour
    Accessory #3 The occasional 18 year Glenfiddich, because I've earned it, dammit.

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    I like it!

  3. #3
    ROG Guru: Orange Belt Array
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    Yet still no 3000 ddr4 lol ;-)

  4. #4
    ROG Guru: Orange Belt Array
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    Uh wow, so x99 really is multi-pole on voltage stability.

    I saw the post about 1.17v 4.5GHz, so I tried it. Works so far.... I'm thinking that I need to start over from 1v and work up rather than down now that I know it wants more vccsa...

  5. #5
    ROG Guru: Green Belt Array Qwinn PC Specs
    Qwinn PC Specs
    MotherboardRampage V Extreme - BIOS 3301
    Processor5930K @ 4.4 GHz Adaptive 1.27v / 4.2 Ghz cache Offset +0.27v / Input 1.92v / LLC7
    Memory (part number)G.Skill 32gb DDR4-2666Mhz 15-15-15-35-CR2 1.2v at XMP settings
    Graphics Card #1Gigabyte Gaming G1 980Ti OC to 1455Mhz Core 8000Mhz memory at Stock Voltage
    Graphics Card #2Gigabyte Gaming G1 980Ti SLI
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    Quote Originally Posted by cekim View Post
    Uh wow, so x99 really is multi-pole on voltage stability.

    I saw the post about 1.17v 4.5GHz, so I tried it. Works so far.... I'm thinking that I need to start over from 1v and work up rather than down now that I know it wants more vccsa...
    Wait... what? Please explain, or provide link.

  6. #6
    ROG Guru: Orange Belt Array
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  7. #7
    ROG Guru: Green Belt Array Qwinn PC Specs
    Qwinn PC Specs
    MotherboardRampage V Extreme - BIOS 3301
    Processor5930K @ 4.4 GHz Adaptive 1.27v / 4.2 Ghz cache Offset +0.27v / Input 1.92v / LLC7
    Memory (part number)G.Skill 32gb DDR4-2666Mhz 15-15-15-35-CR2 1.2v at XMP settings
    Graphics Card #1Gigabyte Gaming G1 980Ti OC to 1455Mhz Core 8000Mhz memory at Stock Voltage
    Graphics Card #2Gigabyte Gaming G1 980Ti SLI
    MonitorROG Swift PG278Q
    Storage #1Intel 750 PCIe 1.2TB
    Storage #2Sandisk Ultra II 960GB SSD
    CPU CoolerThermaltake Water 3.0 Ultimate (360" rad AIO)
    CaseThermalTake v71 Full Tower
    Power SupplyEVGA SuperNOVA 1200 P2
    Keyboard Saitek Eclipse II
    Mouse Razer A5090 Master of Destiny
    OS Windows 10 Professional 64 bit Build 10586

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    Ok, still not sure I'm getting it. Is the suggestion here that you can drop voltage, lose stability, drop it further and get stability back? That would imply that you could raise voltage on your 1.17v OC and actually lose stability.

  8. #8
    ROG Guru: Orange Belt Array
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    Quote Originally Posted by Qwinn View Post
    Ok, still not sure I'm getting it. Is the suggestion here that you can drop voltage, lose stability, drop it further and get stability back? That would imply that you could raise voltage on your 1.17v OC and actually lose stability.
    Well, that's a really terrible way to look at it, but technically accurate/possible.

    In a complex circuit there is usually a "set" of possible frequencies and voltages that will all function, but given overshoot, ringing, etc... there is no guarantee that this set will be continuous.

    That is, it is entirely possible that you can have a system that works from N->M, does not work from M->X and then works again from X->Y where N < Y.

    It is also possible for it to function over this entire range, but be more or less susceptible to temperature and load variations over longer spans of time.

    Given that, as overclockers, we have zero visibility into the system, we tend to assume and rely upon linearity to fudge through this reality, but now and then this proves to be very, very wrong.

  9. #9
    ROG Guru: Green Belt Array Qwinn PC Specs
    Qwinn PC Specs
    MotherboardRampage V Extreme - BIOS 3301
    Processor5930K @ 4.4 GHz Adaptive 1.27v / 4.2 Ghz cache Offset +0.27v / Input 1.92v / LLC7
    Memory (part number)G.Skill 32gb DDR4-2666Mhz 15-15-15-35-CR2 1.2v at XMP settings
    Graphics Card #1Gigabyte Gaming G1 980Ti OC to 1455Mhz Core 8000Mhz memory at Stock Voltage
    Graphics Card #2Gigabyte Gaming G1 980Ti SLI
    MonitorROG Swift PG278Q
    Storage #1Intel 750 PCIe 1.2TB
    Storage #2Sandisk Ultra II 960GB SSD
    CPU CoolerThermaltake Water 3.0 Ultimate (360" rad AIO)
    CaseThermalTake v71 Full Tower
    Power SupplyEVGA SuperNOVA 1200 P2
    Keyboard Saitek Eclipse II
    Mouse Razer A5090 Master of Destiny
    OS Windows 10 Professional 64 bit Build 10586

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    Hmmm. Ok. So out of curiosity, what are your vcache, vinput and vccsa for your 1.17 4.5? LLC? Any other settings you think are working particularly well for you?

  10. #10
    ROG Guru: Orange Belt Array
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    Quote Originally Posted by Qwinn View Post
    Hmmm. Ok. So out of curiosity, what are your vcache, vinput and vccsa for your 1.17 4.5? LLC? Any other settings you think are working particularly well for you?
    Will update in a bit. I am investigating some linux issues at the moment.

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