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Thread: Combatting vdroop without LLC




  1. #1
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    Default Combatting vdroop without LLC

    So I've been struggling with my overclocking experience going past 3.78 GHz (180x21). I can achieve stability (with P95 and IBT) up to 4.01 GHz with with Load Line Calibration off (having it on makes my temps go close to 90degrees), BUT... I need a vcore of 1.456 due to about .09 of vdroop under load. Also, with LLC enabled at over 1.35 vcore under load I start to get a hissing oscillating sound from the area around the cpu. So I really am not wanting to toy with LLC.

    I've got all C-states disabled but I'm just trying to figure out if this is safe or if there is a better way to deal with this amount of fluctuation.
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  2. #2
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    Default Re: Combatting vdroop without LLC

    It seems a lot of vcore for 3.8ghz,have you tested with less? What qpi/vtt voltage are you using? And you can enable c states and clock through dvid,that way your CPU won't be using max voltage all the time,only under load
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  3. #3
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    Default Re: Combatting vdroop without LLC

    Do I need to enable all c-states to try with dvid? Or can I just do it with C1E and C3/C6? (not EIST)I think you misunderstood... For 3.78 GHz I need about 1.325 vcore and 1.29vtt. But vcore and droop increases exponentially as I get closer to 4GHz ( that's where I need 1.456).VTT wise I seem to be ok at around 1.31I have been following the 3 step OC guide over at techreaction to get to these numbers.
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    Default Re: Combatting vdroop without LLC

    You need eist and c3,c1e can be disabled and select balanced (win7) or minimum hardware (xp) in power saving options,select normal setting in CPU voltage list and post back what voltage it uses for CPU in the BIOS
    Gigabyte z77x UP4-TH F11c Modded Bios
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  5. #5
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    Default Re: Combatting vdroop without LLC

    Ok so your saying using dvid I should be able to achieve stability up to my 4GHz but with lower vcore?

    I'm not sure I follow how that would work...would setting dvid to say +.05 somehow limit the amount of droop under load at 4GHz?
    GA-P55A-UD3/i7-870 2.93GHz/ Noctua NH-U12P/ GeForce 9500 GT
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  6. #6
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    Default Re: Combatting vdroop without LLC

    Some motherboards/bios's have better voltage control using dvid vs using set vcore. All you need enabled for dvid to work is Eist enabled and set vcore to normal. Dont be afraid of using LLC. If you dont like the vdroop or you feel like it is too much then use llc.

    Some things to also note when using DVID. Your cpu's VID (defualt vcore) will very with cpu multi. So lets say with my cpu at 21x default vid is 1.25v but at 19x it only 1.11875. If you are testing 19x200 = 3.8ghz at lets say 1.11875 + 0.28125= 1.4v and then you set cpu multi to 21x180 = 3.8ghz but forget to set dvid again when you boot you will get 1.25+0.28125 =1.53125v

    I only say this not to scare you but just so you know your cpu's VID will change with cpu Multi.
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  7. #7
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    Default Re: Combatting vdroop without LLC

    It won't lower your load voltage but it will save you using full fixed voltage all the time,voltage will scale depending on CPU stress load so you won't be using max all the time

    I'm at 4.2ghz using dvid with a normal voltage of 1.18750v then I add an extra voltage off +0.0750v making a total of 1.2625v,and when idle it uses around 0.950v
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
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    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

  8. #8
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    Default Re: Combatting vdroop without LLC

    Thanks for your well laid out suggestions.

    Ok so I did some experimenting with DVID this weekend as recommended: While it certainly reduced my temperatures, I am not able to report any advantages in requiring less voltage at load. In addition enabling EIST and DVID has a negative effect on performance when it comes to my audio apps performance: Ableton Live.

    Since this machine is primarily designed as my DAW running lots of VST's, I have to go with having EIST disabled.

    So basically I am at 1.6 DRAM, 1.31 VTT and 1.456 in BIOS. CPU Z shows 1.408 at idle and under can fluctuate as low as 1.347 and occasionally spikes to 1.472. Temps under load (IBT/P95) are around 80 degrees with my Noctua Air cooler.

    I guess what I'm really wondering is if this is safe to run 24-7? Or am I better alternating to between a lower OC at 3.78GHz for every day usage and then loading the 4.01Ghz profile when I need that extra bump.
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  9. #9
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    Default Re: Combatting vdroop without LLC

    Quote Originally Posted by heifetz77 View Post
    Thanks for your well laid out suggestions.

    Ok so I did some experimenting with DVID this weekend as recommended: While it certainly reduced my temperatures, I am not able to report any advantages in requiring less voltage at load. In addition enabling EIST and DVID has a negative effect on performance when it comes to my audio apps performance: Ableton Live.

    Since this machine is primarily designed as my DAW running lots of VST's, I have to go with having EIST disabled.

    So basically I am at 1.6 DRAM, 1.31 VTT and 1.456 in BIOS. CPU Z shows 1.408 at idle and under can fluctuate as low as 1.347 and occasionally spikes to 1.472. Temps under load (IBT/P95) are around 80 degrees with my Noctua Air cooler.

    I guess what I'm really wondering is if this is safe to run 24-7? Or am I better alternating to between a lower OC at 3.78GHz for every day usage and then loading the 4.01Ghz profile when I need that extra bump.
    Make sure you are using the latest version of CPU-z. Those settings you listed are with out LLC? If LLC is disabled Voltage should not spike above what is set in bios. Do you have ET6(easy tune6) installed? If not try installing again make sure you have the latest verion and see what it shows for vcore under load.

    I am not sure what Intel says is max vcore for your cpu but I would guess its around 1.35v like x58 cpus. I run mine at 1.4v 24/7 but my system is water cooled. What are your core temps? Keep them under 80c at full load and you should be ok.

    Also make sure you are using the latest bios for your board.
    Main Rig
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    Samsung Green 8GB 2x4GB MV-3V4G3D/US DDR3 1.3v 30nn @ 2200Mhz 11-11-11-32 1.60v
    Sapphire ATI HD 7970 3GB clocked 1200MHz @ 1.181v.
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    Corsair Force GT 120 GB Sata3 SSD on Intel sata3 controller port1
    Samsung 320GB HD322GJ 7200 RPM 16M cache on Intel sata3 controller port2
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  10. #10
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    Default Re: Combatting vdroop without LLC

    Thanks Ace, yes that is with LLC Disabled. I will try monitoring voltages under load with EasyTune and report back. And yes I am using the latest BIOS (f11) for my board.
    GA-P55A-UD3/i7-870 2.93GHz/ Noctua NH-U12P/ GeForce 9500 GT
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