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Thread: 4 GHZ need advice!!

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    Default 4 GHZ need advice!!

    Hi Evereybody!!
    I have recently overclocked my i7 950 to 4 GHZ and facing some problems now.

    Mainboard: Gigabyte EX58 UD5 ( Version F12)
    CPU: i7 950
    GPU: MSI GTX 295(715/1512/1215)
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    und zwei 1 TB WDC Black im RAID
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    OC: ImageShack Album - 8 images
    Benches: ImageShack Album - 6 images

    First off the OC is stable I have tested it with Prime95 and LinX.
    I really put a lot of effort in this ....I tryed really hard to consider every aspect for example(not to use even CPU Multiplier...etc)
    My problem now is that my CPU Vantage results without Physx and my Cinebench 11.5 results seem kinda low to the ones with similar systems on the net.
    My guess is that I must have left something out or that I wasenīt precise enough or just did something wrong.
    So please help me and give me lots of advice on how to modify and improve my OC.

    thx


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    You did not run same test. I is "P" and 1 is "E"

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    I donīt understand what you mean could you explain ?

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    Quote Originally Posted by Kung Pow View Post
    My problem now is that my CPU Vantage results without Physx and my Cinebench 11.5 results seem kinda low to the ones with similar systems on the net.
    My guess is that I must have left something out or that I wasenīt precise enough or just did something wrong.
    So please help me and give me lots of advice on how to modify and improve my OC.

    thx
    The results are seem inline to me.

    Can you elaborate on the similar systems, you meant the same CPU/RAM and GPU or just the same processor?

    Wanna better score then try to push the OC to 4.2 or higher.

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    Quote Originally Posted by Kung Pow View Post
    I donīt understand what you mean could you explain ?

    There is a dropdown at the top of the Vantage window. You can chose what kind of thest. P signifies performance and E signifies extreme. The test numbers will be different.

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    Thatīs exactly what I donīt wanna do ...I want to get the most out of my 4 GHZ and I would like you guys to give me some advice on how to improve my OC so please take a loot at the BIOS Screens and tell me what I should change or increase or leave out etc

    I am thinking maybe the 12 GB RAM are slowing it down a little?
    Or it might be the timings? I heard that with a Command Rate 2 you could get better CPU speeds
    Or could it be the Uncore? so please help me out^^

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    you can try drop down the CPU multiplier and pump up the Bclk, and enable the Load-line calibration.

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    Would that really pump up performance?
    Because my boards top BCLK is 200 and to reach 4 GHZ it would require a CPU Multi of 20x and thats bad because you are only supposed to use uneven CPU Multipliers ...and isnīt ut said that in the end itīs more important how high the CPU Multi is not the BCLK and that it would rather contribute to performance if that CPU Multi was high not so much the BCLK thats what I have heard.

    Secondly ..wouldnīt enabling LoaLineCalibration pushing up the Voltages to unreal numbers which would also affect temps?

    My current settings: Vcore 1.26....CPU Multi:23 x BCLK 175 (CPUZ only shows 1.21 )
    QPI/VTT 1.33 .... Uncore: 3850 MHZ ....QPI:6.3
    RAM ...1750 MHZ Timings 8-8-8-20-1 ....1.62

    With that settings I score 7.00 in Cinebench 11.5 and 25.235 in Vantage without Physx

    Do you really think with the settings you posted earlier I could beat those scores?

    And another question...is it really true that I could score higher with an Command Rate of 2? that means 8-8-8-20-2 because it would boost CPU a little?

    I also thought of taking 4 GB RAM out because I have been told the 12 GB are slowing the CPU down.

    Please reply little quicker this time and tell me your thoughts about the scores I am now satisfied but if you tell me I could get more out of the 4 ghz pl do that then^^
    Last edited by Kung Pow; 27-09-2010 at 22:59.

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    Well taking out 3 sticks of ram would help, it takes more to OC with 12gigs.

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    higher Bclk performs better than lower one

    You miss understand about Loadline calibration feature. It helps to stablize the voltage drop. You set Vcore 1.26v (actual in the Bios) and it drops to 1.21v in Windows, as for the rest of the other voltage as well. Take a look at your BIOS voltage screen shot, they are all lower than then the actual values you have inputted. The voltages are fluctuating, this is no good for overclocking.

    use 195bclk x 21 = 4Ghz

    1T out performance 2T

    What is your RAM stock frequency?
    If you can run your current 8-8-8 with 1T then you will notice performance bandwidth and score.

    Do you have mix RAM modules?
    How can you take out only 4Ghz when Triple channel modules come in 6Gb (3 x 2Gb) kit?

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    Quote Originally Posted by smduff View Post
    Well taking out 3 sticks of ram would help, it takes more to OC with 12gigs.
    we are not talking about high OC here. He wants higher score with his current 4Ghz overclock.

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    Quote Originally Posted by Kung Pow View Post
    Would that really pump up performance?
    Because my boards top BCLK is 200 and to reach 4 GHZ it would require a CPU Multi of 20x and thats bad because you are only supposed to use uneven CPU Multipliers ...and isnīt ut said that in the end itīs more important how high the CPU Multi is not the BCLK and that it would rather contribute to performance if that CPU Multi was high not so much the BCLK thats what I have heard.

    Secondly ..wouldnīt enabling LoaLineCalibration pushing up the Voltages to unreal numbers which would also affect temps?

    My current settings: Vcore 1.26....CPU Multi:23 x BCLK 175 (CPUZ only shows 1.21 )
    QPI/VTT 1.33 .... Uncore: 3850 MHZ ....QPI:6.3
    RAM ...1750 MHZ Timings 8-8-8-20-1 ....1.62

    With that settings I score 7.00 in Cinebench 11.5 and 25.235 in Vantage without Physx

    Do you really think with the settings you posted earlier I could beat those scores?

    And another question...is it really true that I could score higher with an Command Rate of 2? that means 8-8-8-20-2 because it would boost CPU a little?

    I also thought of taking 4 GB RAM out because I have been told the 12 GB are slowing the CPU down.

    Please reply little quicker this time and tell me your thoughts about the scores I am now satisfied but if you tell me I could get more out of the 4 ghz pl do that then^^
    12G does not slow CPU down, it puts more stress on the IMC. You can get way more than 4Ghz with decent cooling. What cooling solution are you using.... I did not see it.

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    So Deton are you absolutely sure that higher BCLK is better for Performance than ā higher CPU Multi? Because I very often heard differently.

    Ok 21 x 195 would result in 4.095 GHz which would nearly be 4.1 GHZ
    what I could try is 191 x 21 what would be 4.011
    But would that really Be better than my current 175 x 23?

    Another Thing is the Voltages for example I have the Vcore currently Set to 1.26
    in WIndows CPU Z Shows 1.21 in another Forum the people told me that was a good Thing and that I should Be happy that my CPU only needs 1.21 V out of the 1.26 so you are indicating that this only means Vdrop that it is ā Bad thing and is only the Case because I don't have LLC enabeld and of I had CPU Z would Show 1.26?
    Because they all say LLC enabled mostly supplies the CPU with consideribly more voltage it actually needs and that causes high temps . So what CPU clocks? And LLC enabled or Not?
    What I also heard is that the Voltages do not affect Performance as they only influence stability.

    Ok I run my 1750 Mhz RAM at 1.62V with 8-8-8-20-1 Timings
    I noticed that with Command Rate 1 I get better MaxxMem 2 Result (screen) but now I heard in another Forum that it would be benefitial for the CPU of the Command rate was set on 2 so please confirm that
    Last edited by Kung Pow; 28-09-2010 at 03:37.

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    Quote Originally Posted by Kung Pow View Post
    So Deton are you absolutely sure that higher BCLK is better for Performance than ā higher CPU Multi? Because I very often heard differently.

    Ok 21 x 195 would result in 4.095 GHz which would nearly be 4.1 GHZ
    what I could try is 191 x 21 what would be 4.011
    But would that really Be better than my current 175 x 23?
    Yes, higher Bclk yield better performance than lower Bclk when benching but you won't notice the performance different in real world applications.

    So try 191x21 and do some benchies and compare the current results.

    Quote Originally Posted by Kung Pow View Post
    Another Thing is the Voltages for example I have the Vcore currently Set to 1.26
    in WIndows CPU Z Shows 1.21 in another Forum the people told me that was a good Thing and that I should Be happy that my CPU only needs 1.21 V out of the 1.26 so you are indicating that this only means Vdrop that it is ā Bad thing and is only the Case because I don't have LLC enabeld and of I had CPU Z would Show 1.26?

    Because they all say LLC enabled mostly supplies the CPU with consideribly more voltage it actually needs and that causes high temps . So what CPU clocks? And LLC enabled or Not?
    What I also heard is that the Voltages do not affect Performance as they only influence stability.
    if your OC is stable at 1.21v then go into BIOS change it to 1.21v and enable the Load Line Calibration.

    Did you actually observer the Vcore at load to see if the CPU is actually running at 1.21v?
    I'm bet it's running at 1.26v when you P95. Yes, lower Vcore keep the CPU temp in check, it has no overall performance gain.

    Quote Originally Posted by Kung Pow View Post
    Ok I run my 1750 Mhz RAM at 1.62V with 8-8-8-20-1 Timings
    I noticed that with Command Rate 1 I get better MaxxMem 2 Result (screen) but now I heard in another Forum that it would be benefitial for the CPU of the Command rate was set on 2 so please confirm that
    About benefitial of using 2T vs 1T; it's often when you OC the memory at high MHz, you have to losen off the timing and 2T is usually come in play to help stablize the RAM overclocking but it takes 2-3% performance hit when 2T is used. However, you will be able to achive higher overclock for the CPU. This is why the other people (other forum) said 2T is benifit for CPU when you do extreme overclocking it.

    In your case; you are not going OC any higher than 4Ghz and you can get your RAM runs at 1750MHZ, 8-8-8-20-1T. So why on earth you want to change it to 2T?

    Wanna to gain more performance boost?
    Try to OC your RAM a little bit more but you might have to use higher CAS values though.

    What's your stock RAM specs?

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    Heyy Deton I followed your advice and tryed it once more with a high BCLK

    I currently got it at
    CPU Multi: 19x
    BCLK:215
    Uncroe:3870 MHZ
    RAM:1720 MHZ(Stock 1066)

    got Vcore:1.26
    QPI/VTT:1.33
    Vdimm:1.62
    Load Line Calibration enabled
    CPU Z shows 1.23 now
    Max temp rose from 55 to 66 degrees.

    The benchmark results for CPU and RAM have slightly elevated but I donīt think itīs because
    I improved my OC by enabling LLC I think itīs just because 19 x 215 = 4.085
    ...and those 85 MHZ are doing the trick donīt you think so too?

    Because CPU Z is showing 1.23 now and LLC is enabled should I change the Vcore to 1.23 or is it ok to leave it at 1.26?

    Here the results http://img266.imageshack.us/gal.php?g=cinebenchnew.png

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    Quote Originally Posted by Kung Pow View Post
    The benchmark results for CPU and RAM have slightly elevated but I donīt think itīs because
    I improved my OC by enabling LLC I think itīs just because 19 x 215 = 4.085
    ...and those 85 MHZ are doing the trick donīt you think so too?

    Because CPU Z is showing 1.23 now and LLC is enabled should I change the Vcore to 1.23 or is it ok to leave it at 1.26?

    Here the results http://img266.imageshack.us/gal.php?g=cinebenchnew.png
    Vdroop is always there but LLC is help to close the gap. Sometime voltage drop could cause by PSU as well (poor quality). Just tweaking the voltage until you find the lowest setting that give you the stability.

    Now you know your mobo is not limited at 200bclk but you're very close to the its max though because 220Bclk is mostly achiveable by highend mobos.

    Like I said high Bclk outperform low Bclk, the trade off is the high temperature.

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