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Thread: i7 920 & ex58-ud3r... 3.8GHz OC help please




  1. #1
    Join Date
    Apr 2009
    Posts
    52

    Default i7 920 & ex58-ud3r... 3.8GHz OC help please

    How does this look for a 3.8GHz overclock?
    Temps barely touch 70c during Prime95...


    Code:
    Mother Board ( Gigabyte ex58-ud3r ) 
    Drivers ( Current ) 
    Bios ( f5 ) 
    CPU ( i7 920 ) 
    CPU Cooler ( TRUE, Push only) 
    Memory ( XMS3 TR3X6G1333C9 3X2GB DDR3-1333 CL 9-9-9-24 ) 
    PSU ( Corsair TX650 ) 
    GPU ( Geforce 9500gt for another month )  
    Drivers ( 182.5 ) 
    Operating System ( Vista Home Premium 64 Bit) 
     
    MB Intelligent Tweaker (M.I.T):
    CPU Clock Ratio [19x]
    CPU Frequency [3.8GHz] [200x19]
    QPI Link Speed [x36] [7.2GHz]
    Base Clock Control [Enabled]
    BCLK Frequency (Mhz) [200]
    Performance Enhance [Standard]
    System Memory Multiplier (SPD) [6.0]
    Memory Frequency (Mhz) [1200]
    DRAM Timing Selectable (SPD) [Auto]
    >>>Channel A+B+C
    CAS Latency Time [9] [Auto]
    tRCD [9] [Auto]
    tRP [9] [Auto]
    tRAS [22] [Auto]
    Command Rate (CMD) [1] [Auto]
    Profile DDR Voltage [1.5V]
    Profile QPI Voltage [1.15V]
     
    Advanced CPU Features:
    Intel Turbo Boost Tech. [Disabled]
    CPU Cores Enabled [All]
    CPU Multi Threading [Enabled]
    CPU Enhanced Halt (C1E) [Enabled]
    C3/C6/C7 State Support [Disabled]
    CPU Thermal Monitor [Enabled]
    CPU Eist Function [Enabled]
    Virtualization Technology [Disabled]
    Bi-directional PROCHOT [Enabled]
     
    Uncore & QPI Features:
    QPI Link Speed [x36]
    QPI Link Speed [7.2GHz]
    Uncore Frequency [x13]
    Uncore Frequency [2600Mhz]
    Isochronous Support [Enabled]
     
    Advanced Clock Control:
    Base Clock (BCLK) Control [Enabled]
    BCLK Frequency (Mhz) [200]
    PCI Express Frequency (Mhz) [100]
    C.I.A.2 [Disabled]
    CPU Clock Drive [800mV]
    PCI Express Clock Drive [900mV]
    CPU Clock Skew [0ps]
    IOH Clock Skew [0ps]
     
    Advanced Voltage Control:
    Load-Line Calibration [Disabled]
    CPU Vcore 1.25625V [1.35625V]
    QPI/Vtt 1.15V [1.34V]
    CPU PLL 1.800V [1.800V]
    >>>MCH/ICH
    PCIE 1.500V [Auto]
    QPI PLL 1.100V [1.100V]
    IOH Core 1.100V [1.100V]
    ICH I/O 1.500V [Auto]
    ICH Core 1.100V [Auto]
    >>>DRAM
    DRAM Voltage 1.500V [1.540V]
    DRAM Termination 0.750V [Auto]
    Ch-A Data Vref. 0.750V [Auto] (same for B and C)
    Ch-A Address Vref. 0.750V [Auto] (same for B and C)

    Is there anything I should think about changing?
    If I drop any Vcore I get BSOD's...
    Is it safe to have QPI Link Speed above 7GHz?
    I tried 190bclk x 20 for 3.8GHz, and that keeps QPI Link under 7,
    but I get BSOD as soon as I try to load CPU.
    Last edited by someguyonapc; 05-08-2009 at 12:41 AM.

  2. #2
    Join Date
    May 2009
    Posts
    22

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    Hi, been a long time reader, but now have a reason to post here.I am up with C2Duo overclocking and have used the guide on this forum to help me overlock my E8600 to 4.5 on air on a GA-EX38-DQ6. and now have the opertunity to play with some i7 gear.

    What sort of cooling are you using?

    someone here will probably need to know a bit more info about the cooling you are using i would asume.

    I have just put to gether a rig for my mates father and has the same combo of m/b.Im using a TRUE on it with 2x noctua 120mm fans. getting load temps of around 71-74 in occt linpack test. I havent lapped the cooler or the cpu. have a 200x20 Bclk for a 4Ghz overclock. 1.3v load testing on it at the moment

    Not trying to hijack the thread here but i think we might be able to help each other.


    Have you read this http://images.tweaktown.com/imageban...2.12_(ENG).pdf

    got me started, but the volts seem high.

    hopefully someone can give some recomendation as to wether we really need a voltage of 1.5 on the QPI/VTT seems high as this board doesnt even reach there.

    UPDATE.

    I have been doing some quick stabilty testing (occt for 1 hour on the Power supply test , linpack + furmark) and have achieved a massive reduction in voltage over what the guide says.

    currently im on 1.25v on cpu and 1.255 on the QPI/VTT and have temps around 65-65-65-65 max after 30 mins
    Last edited by BaldMan; 05-07-2009 at 09:04 PM. Reason: More tests

  3. #3
    Join Date
    Apr 2009
    Posts
    52

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    I have read through that guide but didn't really know what I was doing so I didn't want to just crank stuff up that high. I'm just coming out of the prebuild hole and have much learning to do yet.

    For cooling I'm using a T.R.U.E, push only for now.
    I may add another fan to it soon if I really need to, but it seems to be working fine as it is. My case is a Coolermaster CM-690 and it's outtake fan takes the warm air from the TRUE out pretty well. I can add more fans to the case too if I want, but for now I only have the 3 that came with it (one front, one back, one side).

    I want this computer to last at least 3 years, and I'll be doing a lot of graphics work on it, so whatever overclock I go with needs to be stable and safe. I need to know more about safe range for QPI and Uncore... in terms of GHz/Mhz and also voltage. Also, are there any voltage settings that should be taken off 'Auto' (check my first post).

    I'm trying to hit 3.8GHz for now... that's really as far as I want to go until I learn more and get a little more brave. I may try to push it further for benchmarking and stuff, but not for everyday use. I can't get 3.8 stable unless I set Vcore to at least 1.35625V in BIOS. That seems pretty reasonable to me... reads 1.328 idle and 1.280 load in cpu-z. Qpi/Vtt is at 1.34 and I'm wondering how far I can drop that, if any.

    Anyway, as I sit here now I'm at 3.780GHz... 180bclk x 21 (turbo on) and have Vcore @ 1.350V in BIOS, QPI/Vtt @ 1.34, DRAM @ 1.5. These settings are Prime95 stable and temps are good. I don't see much of an increase in performance going from this to the settings in my first post and I can use less voltage so I'm pretty comfortable here, but of course I'd like to push it a little further.

  4. #4
    Join Date
    Apr 2009
    Posts
    52

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    Quote Originally Posted by BaldMan View Post
    UPDATE.

    I have been doing some quick stabilty testing (occt for 1 hour on the Power supply test , linpack + furmark) and have achieved a massive reduction in voltage over what the guide says.

    currently im on 1.25v on cpu and 1.255 on the QPI/VTT and have temps around 65-65-65-65 max after 30 mins

    What are your BIOS voltage settings vs. what shows in cpu-z?

  5. #5
    Join Date
    Apr 2009
    Posts
    52

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    I can't get 4GHz to boot into windows...
    I'm going to try again as I see I forgot to enable LLC.

    **edit**
    I enabled Load-Line Calibration...
    That didn't work.
    Upped Vcore to 1.41250V...
    That didn't work either.
    I'm not sure what to do reallly.
    I guess I'll focus on getting 3.8GHz stable with as low voltages as possible.
    Last edited by someguyonapc; 05-08-2009 at 02:36 AM.

  6. #6
    Join Date
    Apr 2009
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    52

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    Anyway, back to my first post...
    Is there anything I should change?
    I don't mind voltages where they are, but I'm curious about the 'Auto' settings.

  7. #7

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    See my sig for my rig. I'm using TRUE push-only as well. I dunno how much the motherboard will matter since I'm running a UD4P, it probably has more to do with your CPU batch, but try setting every voltage to NORMAL and push your BCLK to see where it ends up.

    Interestingly I cannot get my CPU to run stable between 190-205 BCLK without massive voltage jumps (1.32v Vcore and 1.4v QPI), but 206-210 work just fine at around 1.296-1.312 Vcore and 1.295 QPI (though it runs a bit hot ~ 85C @ load). I can't figure out why heh...

    The AUTO setting tries to estimate what the voltage should be, probably using linear scaling with frequencies. That could be very bad, especially in my case where higher BCLK lets me use much lower voltage.
    i7 920 C0/C1 3841A
    24/7 OC: 21x183Mhz = 3.84Ghz @ stock Vcore/QPI voltages
    Thermalright Ultra-120 Extreme 1366
    3x2GB OCZ DDR1600 OCZ3P1600LV6GK
    EX58-UD4P BIOS F11
    EVGA GTX 260 Core 216 SC 55nm 896-P3-1257-AR
    Antec NEO HE 550 Power Supply

  8. #8
    Join Date
    May 2009
    Posts
    22

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    Did you look at your QPI and uncore frequencies?
    If these are incorrect you probably wont boot, of memory there was something about the uncore needing to be 2x The ram or 2x+1.
    There are a few adjustments that need to be made.

    I am at work atm , so i cant get any screenies, but i have the following settings to achieve a 4Ghz overclock

    CPU 1.25v in Bios (shows around 1.235 in PC Health) about 1.18 under load, I dont use LLC.
    QPI/Vtt is on 1.313 (or what ever the last voltage is before it goes red in the Bios)

    My QPI is at 7.2Gts
    Uncore is at 3800

    Load testing at 1.25v bios has led to max temps of around 66 on each core.

  9. #9
    Join Date
    Apr 2009
    Posts
    52

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    I don't know how you are able to get 4ghz with voltages like that.
    I've barely been able to get stable and I have to set Vcore to 1.41750V in BIOS... QPI/Vtt @ 1.4V... IOH Core @ 1.2V... CPU PLL @ 1.9V... everything else on 'Auto'.
    Uncore Frequency x13... QPI Link x36.

  10. #10
    Join Date
    May 2009
    Posts
    22

    Default Re: i7 920 & ex58-ud3r... 3.8GHz OC help please

    I do have a new D0 stepping CPU, maybe that is whats helping me with low volts.

    I beleive my uncore is x19 and QPI is x36

    Also i have turned my Hyperthreading of as this is for a gaming pc and not alot of software/games use mutli core over 2 cores very well, this apparently reduces temps by around 6 deg from what i have been reading online.
    Last edited by BaldMan; 05-08-2009 at 09:24 AM. Reason: More info

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