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Thread: Help with i7 920 OC




  1. #1
    Join Date
    Jul 2009
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    Default Help with i7 920 OC

    Basically I've combined the threads I've posted from other forums in hopes of having responses quick enough & correct to help me acheive a really nice and stable OC.

    ----
    I've done some more tweaking, but starting at a point I know it is stable ( 20 cycle run of LinX w/ All Memory), and here is a breakdown of some of the troubles I encountered -- and maybe someone can help guide in a direction.

    CPU Ratio @ 20x
    BCLK @ 183

    I changed the...
    vCore voltage --> 1.2500v
    DRAM voltage --> 1.5v (CPU-Z had a listing of speeds)
    QPI/VTT --> 1.300v
    Memory Timings --> 7-7-7-16-1T and the tRC to 27
    Memory Multipler --> x6
    Uncore --> x13

    LinX passed with no errors with these settings, so I was like "okay, sweet with the extra 1x multiplier I am running good with 3.8Ghz!"

    (voltages not changed) So then I tried....


    BCLK @ 190
    Memory Multiplier --> x8
    Uncore --> x17
    Memory Timings --> 8-9-9-19-1T and the tRC to 31

    I started LinX with a 20 cycle run and I watched it reach 3-4 cycles and then I went and di something else for a little while. I come back it has reached it's 11th or so cycle - so I decided that it was probably stable and I would let it finish, so I went and watched some TV.

    WRONG!!
    It Blue Screened with another freakin' 124 error message. So,,,, Do I lower or raise voltage? DRAM voltage? or QPI/VTT voltage?
    I do not know, nor do I know if it is my memory timings and how to loosen them up, either.

    Does anyone have any suggestions?

    lright, I have been working with this system for the whole weekend lowering voltages and testing with LinX with 20 cycles to find out what I can achieve as a reliable overclock. I took the settings from Maximum PC and tested to see if I could boot, and once that was completed that's when I started the lowering of voltages and testing.

    System Specs:

    Gigabyte BA-EX58-UD5 motherboard
    Intel Core i7 920 D0
    OCZ Platinum DDR3 1600 3x2GB
    Corsaid TX850w PSU
    Prolimatech Megahalem w/ 113CFM Delta PWM fan
    EVGA GTX275 FTW
    3x WD Caviar Black 640GB - RAID 0

    I started out with these settings...
    Everything in BIOS was set to AUTO except the

    BCLK [183]
    CPU vCore [1.400v]
    QPI/Vtt [1.300v]
    System Memory Freq [x6.0]


    I have now, after 18 tests/runs gotten down to these settings...
    Everything in the BIOS set to AUTO except the

    BCLK [183]
    CPU vCore [1.23125v]
    QPI/Vtt [1.300v]


    First, let me say this I did have the system booted at 1.2250v and got to the 7th of 20 cycles in LinX before the computer Blue Screened with a 124 which from my research indicates a Memory timing/multiplier or Uncore issue. I think I could successfully boot and run stable at or below 1.2250v if I knew how to adjust the memory and Uncore settings properly or at least know the basics and tips at how to configure them.

    So, I am currently running tests at 1.23125v, but I need to know how I can correct the memory and/or Uncore issue so that I can continue lowering volts and possibly even increasing the BCLK. I've read the OCZ Platinum can be picky about timings and voltages so I think having all of that set to AUTO is limiting me, but I'm not quite sure how to correct this.

    Any help is appreciated, Thanks!!
    ------------------------------------
    I have the RAM installed in the White slots of the Gigabyte motherboard, which is the slots furthest away from the CPU.

    I had the memory voltage and timings set to Auto, because I wanted to only modify one thin at a time. I do agree with what you said about being at a higher clock and I think it is possible.

    I 'm trying to find a stable setting with the memory timings and I think I will need to keep the memory voltage at 1.64v or 1.66v. I would like to run the memory at or close to the 1600mhz rating.

    I've currently tried a x6 multi for the memory, 9-9-9-24-1t, DRAM 1.66v, QPI/Vtt 1.34v ?I think? (I will have to double check), x13 for Uncore, and a 189 BCLK.

    I can get to 7th or 8th cycle on LinX (of 20 cycles) before it Bluscreens with a 0x00000124 error code.

    I already know the memory will probably be the trickest thing to configure to ensure a high and stable overclock.

    Also, I think I will continue to leave the Hyper Threading (or Multi-Threading) DISABLED, because it really does lower temperatures by 10 degrees or more.

    And this is my exact memory
    OCZ3P1600LV6GK

    I'm thinking that maybe I should have purchased memory with XMP profiles..
    ------------------------------------
    Right now I am trying

    CPU Ratio --> 20x
    BCLK --> 183
    vCore --> STOCK (1.2125v or something)
    QPI/VTT --> 1.30v
    Uncore --> x13
    DRAM --> 1.5v
    Memory Multi. --> x6
    Load Line Calibration --> Enabled

    So far it has passed a couple of cycles, but I do not know if it will finish completely,,,it gives me something to do until someone responds.

    Thanks!

  2. #2

    Default Re: Help with i7 920 OC

    124BSOD ---> Low QPI/VTT voltage
    101BSOD ---> Low Vcore
    also keep in mind you are running @ 4GHz, average vcore is 1.26v~1.28v

  3. #3
    Join Date
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    Vancouver, Canada
    Posts
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    Default Re: Help with i7 920 OC

    Try raising:

    IOH-->1.2v
    QPI PLL-->1.2v

    cpu vcore looks a little low for that oc as well...

    I also heard: How To OC the i7
    124BSOD ---> Low QPI/VTT voltage or Low Vcore
    101BSOD ---> Low Vcore
    Windows 7 Pro 64 | OCZ Vertex 120 | Cosmos S
    Gigabyte P67A-UD5-B3 (F6) | Enermax Revolution85+ 1050w
    i7 2600k | 2x4 GB Corsair Vengeance 1866 | EVGA GTX570 SC
    Apogee XT | Magicool 360 Radiator | MCP35x Pump + v.2 Res

  4. #4
    Join Date
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    Default Re: Help with i7 920 OC

    thanks for the response I will try the syggestions after work.
    AND to let you all know the last test with the stock voltages at the end of my post I thought would fail actually did complete 20 cycles of the 200 I set on LinX. I stopped it to go to bed, but I think it is stable. I currently have it set to run a full 100 cycles while I am at work.


    I would like to reach 4.0Ghz with or without Turbo, b/c right now I am at 3.8Ghz with Turbo running (it stays on, I turned off EIST). Hopefully this will be possible considering I am running a somewhat low vCore.

    The memory which you can look at NewEgg says 1.65v, but I am running it at what CPU-Z displays. Which is only 1.5v at the posted timings. I'm having issues trying to figure out how to configure the timings and everything correctly.

  5. #5

    Default Re: Help with i7 920 OC

    Quote Originally Posted by jace5869 View Post
    I would like to reach 4.0Ghz with or without Turbo, b/c right now I am at 3.8Ghz with Turbo running (it stays on, I turned off EIST). Hopefully this will be possible considering I am running a somewhat low vCore.
    With a D0 stepping this shouldn't be too difficult, but you may still need a higher VCore and QPI voltages.

    Quote Originally Posted by jace5869 View Post
    The memory which you can look at NewEgg says 1.65v, but I am running it at what CPU-Z displays. Which is only 1.5v at the posted timings. I'm having issues trying to figure out how to configure the timings and everything correctly.
    OCZ Platinum DDR3 ram does NOT report proper settings in CPU-Z, this has been told to customers directly in the OCZ forums. You must configure the settings manually. Starting at 1.65v is a start. You have the same memory as I do, I am running it at 1.65v, 1434Mhz (due to 183BCLK) and 7-7-7-21-1 timings. If you run it at higher speeds, I would think about dropping it to 7-7-7-24-2. Regardless I am keeping the voltage at least 1.65v. Closer to 4Ghz you may try upping the voltage a bit to 1.68 ish also.

    Considering I ram running 183Mhz BCLK at stock voltages with my C0, it should not be a stretch for your D0. I highly suspect once you get your memory settings corrected the overclocking will go much smoother.
    Last edited by demonsavatar; 07-21-2009 at 10:21 PM.
    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

  6. #6
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    Default Re: Help with i7 920 OC

    Good, this is what I am looking for some direction, :)
    I will definitely try your suggestions and thank you for the input on the memory. I have not had the OCZ community reply with that information yet.

    I have one question though... I only have the options for 1.64v and 1.66v which of these would be better, or do you think I should just try 1.68v?

    I do have Load Line enabled so that should help keep voltages stable, right?

    Do you recommend me having Turbo on or off?

    Thanks for your help!!

  7. #7

    Default Re: Help with i7 920 OC

    Quote Originally Posted by jace5869 View Post
    I have one question though... I only have the options for 1.64v and 1.66v which of these would be better, or do you think I should just try 1.68v?
    I have mine set to 1.66v and in EasyTune6 it reads as 1.648v. The drop is expected.

    Quote Originally Posted by jace5869 View Post
    I do have Load Line enabled so that should help keep voltages stable, right?
    This only works for the CPU voltage I believe. It has no control over Memory voltages.

    Quote Originally Posted by jace5869 View Post
    Do you recommend me having Turbo on or off?
    Most people recommend this off as it removes a variable from an already long list of settings.
    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
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    Posts
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    Default Re: Help with i7 920 OC

    Alright, I will turn Turbo off and see if I can get it up to 4.0Ghz without it.
    I have completed 32 cycles of LinX with the settings previously

    CPU stock voltages (usually reads in the 1.168v and such)
    DRAM 1.5v
    QPI/VTT 1.3v (I think, have to look back at it)

    So, I think I still have some good headroom for improvement...

    I will update on the changed settings this afternoon around 12:30 or so and see if I can get some Mhz out of this thing.

    Do you think running only 10 or 5 cycles would be enough for quick stress testing? OR should I leave it at 20?

    LinX seems to do an awesome job over Prime95

    -----
    ------------------------------------
    Right now I am trying

    CPU Ratio --> 20x
    BCLK --> 183
    vCore --> STOCK (1.2125v or something)
    QPI/VTT --> 1.30v
    Uncore --> x13
    DRAM --> 1.5v
    Memory Multi. --> x6
    Load Line Calibration --> Enabled

    So far it has passed a couple of cycles, but I do not know if it will finish completely,,,it gives me something to do until someone responds.
    Last edited by jace5869; 07-21-2009 at 11:33 PM. Reason: Settings from last night

  9. #9
    Join Date
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    Default Re: Help with i7 920 OC

    +1 for the ram. I didn't even notice we were using the same modules o.0.

    The SPD is more like a low voltage, low performance, compatibility set of timings.
    This helps boot up when at default voltages, but I would not use these settings in a high end 4ghz x58 rig...

    For my current OC in sig, I need to set a minimum of 1.62v in BIOS to be stable.
    Once I hit 190 @ 2:8 = 1.64v in Bios (1520 mhz, 7-7-7-24-1)
    200 @ 2:8 = 1.66v in Bios (1600 mhz, 7-7-7-24-1)

    Current settings (21x 185):

    LLC: on
    Cpu vcore: 1.3v
    Vtt: 1.255v
    IOH: 1.2v
    Dram: 1.62v

    Uncore: x17
    mem: 2:8 (7-7-7-20-1)

    Everything else @ (load optimized) defaults settings


    You might also find that you will need less voltage by using turbo mode instead of the x20 multi.

    for 4 ghz for example I'd try:
    21x190, 20x200, 19x211, and compare voltages like that.

    Good luck,

    Ced
    Windows 7 Pro 64 | OCZ Vertex 120 | Cosmos S
    Gigabyte P67A-UD5-B3 (F6) | Enermax Revolution85+ 1050w
    i7 2600k | 2x4 GB Corsair Vengeance 1866 | EVGA GTX570 SC
    Apogee XT | Magicool 360 Radiator | MCP35x Pump + v.2 Res

  10. #10
    Join Date
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    Posts
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    Default Re: Help with i7 920 OC

    Just to let you know, so if this attempt fails maybe you can give me some more good adivce on what to do, I had a successful OC @ 4.0Ghz.

    BCLK = 200
    CPU Multi. = 20x
    IOH = 1.2v
    QPI PLL = 1.2v
    DRAM = 1.66v (under load 1.648v)
    CPU vCore = 1.275v (under load 1.232v and sometimes 1.248v)
    QPI/VTT = 1.34v
    Memory Multi. (SPD) = x6
    Uncore Multi. = x13
    Memory Timings = 7-7-7-21-1
    TURBO = DISABLED
    HT = OFF

    Those settings passed 20 cycles of LinX using all available memory. So, I saved it as a stable 4.0Ghz. OC.

    So, in an attempt to lower voltages (even though temps are good) I am trying these and I will let you know how it goes.

    BCLK = 200
    CPU Multi. = 20x
    IOH = 1.2v
    QPI PLL = 1.2v
    DRAM = 1.66v (under load 1.648v)
    CPU vCore = 1.275v (under load 1.232v and sometimes 1.248v)
    QPI/VTT = 1.30v ***
    Memory Multi. (SPD) = x8 ***
    Uncore Multi. = x17 ***
    Memory Timings = 7-7-7-24-1 ***
    TURBO = DISABLED
    HT = OFF

    So, if this is stable then maybe I will be able to lower voltages some more OR go up on BCLK?

    Post back later

    -------------------------
    UPDATE
    -------------------------

    The above settings did not blue screen, but LinX stopped after 3 minutes and 19 seconds with error.

    What does this mean? more voltage? loosen timings? If so, what?
    Last edited by jace5869; 07-22-2009 at 03:22 AM.

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