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Thread: can't get past 3.7ghz




  1. #1
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    Default can't get past 3.7ghz

    Hi there

    I'm new to overclocking and dont have much experience in this. For now i've succesfully managed to overclock my Q9550 2.83ghz to 3.7ghz, however due to the lack of knowledge and experience i'm hitting a wall.

    CPU: Q9550 (C1) 2.8 @ 3.7
    MB: Gigabyte X48T DQ6
    MEM: 8GB DDR3 Kingston 1333 @1390
    MAX Load temp: with Prime95 51c
    Cooling: the Prolimatech Megahalem

    The only things I've changed in the BIOS (multiplier max 8.5) in order to get to 3.7ghz are the:
    • FSB to 436 and
    • Cpu voltage 1.325V ( the cpu voltage is lower when in Idle )
    • forgot to mention that I also lowered Mem. Multiplier to 3.20B


    I have tried increasing the FSB to 450 but could not start windows. After increasing the voltage (to 1.3625v, max recommended voltage by Intel) i could start windows but still was not able to get stability with Prime95 @ even 3.8ghz and I have seen higher speeds with less Cpu voltage so I must be doing something wrong

    Any ideas / suggestions are appreciated


    p.s these are my settings:

    CPU = Intel Q9550 (C1)
    Motherboard = X48t DQ6, Revision 01
    BIOS Version = F5
    Ram = Kingston 4 x 2GB, part#: 9905403-011.A00LF and the other two have part number: 99U5403-003.A00LF


    Robust Graphics Booster___________ [Auto]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency __________ [436]
    PCI Express Frequency _______ [AUTO]
    C.I.A. 2__________________________ [Disabled]
    System Memory Multiplier (SPD)____ [3.20B]
    DRAM Timing Selectable_______ SPD __ [AUTO]

    Performance Enhance = [Standard]

    CAS Latency Time________________9 [auto]
    Dram RAS# to CAS# Delay_________ 9 [auto]
    Dram RAS# Precharge Delay_______ 9 [auto]
    Precharge Delay (tRAS)__________ 24 [auto]

    ACT to ACT Delay (tRRD)_________ 4 [auto]
    Rank Write to READ Delay________ 5 [auto]
    Write to Precharge Delay_________ 10 [auto]
    Refresh to ACT Delay______________ 74 [auto]
    Read to Precharge Delay__________ 5 [auto]
    Static tRead Value_______________ 9 [auto]
    Static tRead Phase Adjust________ 0 [auto]
    Command Rate (CMD)_______________ 2 [auto]

    CPU/PCIEX Clock Driving Control [800mV]
    CPU Clock Skew Control [normal]
    GMCH Clock Skew Control [Normal]

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [normal]
    PCI-E OverVoltage Control_ [normal]
    FSB OverVoltage Control___ [normal]
    (G)MCH OverVoltage Control [normal]
    CPU Voltage Control_______ [1.325v]




    Cheers
    Last edited by Salentino; 04-20-2010 at 02:21 AM.

  2. Default Re: can't get past 3.7ghz

    Hello. ;)

    Just 2 cents:
    Don't expect the same results in different systems. Even diferent CPUs tested in exact same system (board, ram, psu, etc), don't reach the same frequencies.
    Maybe the results you have seen before were from a CPU with better a patch #; maybe the overall system was better than yours or maybe it was just pure luck!

    Anyway, 3,7Ghz for a Q9550 is very, very nice, I think. You should be happy!

    Do you have a good PSU?

    Does the BIOS have a "Load-line Calibration" setting? "Intel" or "Auto" minimizes the vdroop but, "Disabled" could lead you to higher clocks. You just have to play with it and try.


    Johnny
    System Components: Intel i7 920 C0 @ 4,0Ghz; Gigabyte EX58-UD5 (X58-EXTREME F12 BIOS); Sapphire HD5970 2GB OC Edition; Western Digital Blue 500GB; Seagate 7200.12 1000MB; 6GB Corsair 1333Mhz DDR3; DVD-RW LG; Corsair TX750W
    Watercooling System: EK-Supreme Skt 1366 WaterBlock + EK backplate Skt 1366; Kit EK-FB GAX58 WaterBlocks; Aqua-Computer AquagratiX 5970 WaterBlock; 360mm Thermaltake radiator; 360mm BI Stealth X-Flow radiator; Laing MCP355 pump; EK-DDC X-TOP rev.2 Plexi
    Danger Den Plexi E/S 1/2" reservoir; 4x A.C. Ryan UV 120mm; 3x Tacens Ventus PRO ICE 120mm; 2x NoiseBlocker Black Silent XE2 92mm; Liquid Cooling FESER Black; FESER tubing 3/8" ID and 5/8" OD; Enzotech Compression Fittings G 1/4

  3. #3
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    Default Re: can't get past 3.7ghz

    ThanksJohnny i'm aware of that and I must say i'm pretty happy with it. However as you can see (due to my lack of knowledge) I have not used the full potential and have not tweaked a lot, I have merely played with FSB and CPU voltage

    Earlier today I enabled Load-line Calibrationin my bios and tested it with the same settings as above and after testing with Prime it crashed so my goal of 3.8+ seems to be further than I thought right now



    OK, I left all the settings like they were but increased the Cpu Voltage in BIOS to 1.325V (which seems to be 1.28v/1.26v while under load with Prime95 and 1.296v in idle) and ran Prime95 for 1h30min with no problems so I think its stable right now but still @ 3.7
    Last edited by Salentino; 04-20-2010 at 07:09 AM.

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  5. #5
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    Default Re: can't get past 3.7ghz

    I would love your help:)! I only got it stable at 3.7ghz (where I was at earlier but only stable)

    hope you can help me get past the 3.8 barrier which i seem to have
    I think our timezones dont match :P, i'll be refreshing this page around the clock waiting for your reply
    Last edited by Salentino; 04-21-2010 at 06:16 PM.

  6. #6
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    Default Re: can't get past 3.7ghz

    Try this for 3.825

    Robust Graphics Booster___________ [Auto or Fast]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency __________ [436] << 450
    PCI Express Frequency _______ [AUTO] << Set 100
    C.I.A. 2__________________________ [Disabled]

    System Memory Multiplier (SPD)____ [3.20B]
    DRAM Timing Selectable_______ SPD __ [AUTO] << Manual

    Performance Enhance = [Standard]

    CAS Latency Time________________9
    Dram RAS# to CAS# Delay_________ 9
    Dram RAS# Precharge Delay_______ 9
    Precharge Delay (tRAS)__________ 24

    ACT to ACT Delay (tRRD)_________ 4 [auto] << 3-4
    Rank Write to READ Delay________ 5 [auto] << 4-5
    Write to Precharge Delay_________ 10 [auto] << 8-10
    Refresh to ACT Delay______________ 74 [auto] << 68-82
    Read to Precharge Delay__________ 5 [auto] << 4-5
    Static tRead Value_______________ 9 [auto] << 7-9
    Static tRead Phase Adjust________ 0 [auto] << Auto
    Command Rate (CMD)_______________ 2 [auto] << Set 2

    CPU/PCIEX Clock Driving Control [800mV]
    CPU Clock Skew Control [normal] << Set Auto
    GMCH Clock Skew Control [Normal] << Set Auto

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [normal] << Set to your ram spec, or above for 8GB (+0.3 = 2.1V)
    PCI-E OverVoltage Control_ [normal] << Set Auto or +0.1
    FSB OverVoltage Control___ [normal] << +0.1
    (G)MCH OverVoltage Control [normal] << +0.3 for 8GB
    CPU Voltage Control_______ [1.325v] << More of course, try 1.34-1.42

  7. #7
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    Default Re: can't get past 3.7ghz

    Quote Originally Posted by Lsdmeasap View Post
    Try this for 3.825

    Robust Graphics Booster___________ [Auto or Fast]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency __________ [436] << 450
    PCI Express Frequency _______ [AUTO] << Set 100
    C.I.A. 2__________________________ [Disabled]

    System Memory Multiplier (SPD)____ [3.20B]
    DRAM Timing Selectable_______ SPD __ [AUTO] << Manual

    Performance Enhance = [Standard]

    CAS Latency Time________________9
    Dram RAS# to CAS# Delay_________ 9
    Dram RAS# Precharge Delay_______ 9
    Precharge Delay (tRAS)__________ 24

    ACT to ACT Delay (tRRD)_________ 4 [auto] << 3-4
    Rank Write to READ Delay________ 5 [auto] << 4-5
    Write to Precharge Delay_________ 10 [auto] << 8-10
    Refresh to ACT Delay______________ 74 [auto] << 68-82
    Read to Precharge Delay__________ 5 [auto] << 4-5
    Static tRead Value_______________ 9 [auto] << 7-9
    Static tRead Phase Adjust________ 0 [auto] << Auto
    Command Rate (CMD)_______________ 2 [auto] << Set 2

    CPU/PCIEX Clock Driving Control [800mV]
    CPU Clock Skew Control [normal] << Set Auto
    GMCH Clock Skew Control [Normal] << Set Auto

    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [normal] << Set to your ram spec, or above for 8GB (+0.3 = 2.1V)
    PCI-E OverVoltage Control_ [normal] << Set Auto or +0.1
    FSB OverVoltage Control___ [normal] << +0.1
    (G)MCH OverVoltage Control [normal] << +0.3 for 8GB
    CPU Voltage Control_______ [1.325v] << More of course, try 1.34-1.42
    Greatly appreciated! I have one question before I change these values in the BIOS
    its about the DDR3 OverVoltage, according I should increase the voltage above my ram spec (because i have 8gb), on the website of Kingston I find: : Standard 256M X 64 Non-ECC 1333MHz 240-pin Unbuffered DIMM (DDR3, 1.5V, CL9, FBGA, Gold)

    how do I know how high I can go but also stay safe, is for example +0.3 (2.1v) OK for this memory ?


    p.s
    CPU Clock Skew Control [normal] << Set Auto
    GMCH Clock Skew Control [Normal] << Set Auto
    I don't have an 'Auto' option, only normal , shall I leave it this way ?

  8. #8
    Lsdmeasap's Avatar
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    Default Re: can't get past 3.7ghz

    I only showed +0.3 = 2.1V as an example, and sorry I did not relalize this was DDR3. So +0.3 would be 1.8V.

    Since you ram is 1.5V rated, I'd suggest +0.1 for 1.6V since you have 8GB

    About your skews, you should have auto, but yes normal would be fine. Auto should be there though, you should have auto, normal, and setting choices.

  9. #9
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    Default Re: can't get past 3.7ghz

    Quote Originally Posted by Lsdmeasap View Post
    I only showed +0.3 = 2.1V as an example, and sorry I did not relalize this was DDR3. So +0.3 would be 1.8V.

    Since you ram is 1.5V rated, I'd suggest +0.1 for 1.6V since you have 8GB

    About your skews, you should have auto, but yes normal would be fine. Auto should be there though, you should have auto, normal, and setting choices.
    After playing a little with those figures I managed to get into windows. However, after I ran Prime95 I got a BlueScreen (BCCode: 124), I restarted and ran Prime95 once more and again a BCOD.
    Before with my first settings I was also able to get into windows @ 3.82ghz but could never pass the Prime test (workers stop), however this bluescreen thing is new to me so it has to do something with what I just changed right?.

    just to be sure are my settings correct? please see here:

    Imageshack - img0468bq.jpg
    Imageshack - img0469c.jpg

    Thanks again!
    Last edited by Salentino; 04-22-2010 at 06:32 AM.

  10. #10
    Lsdmeasap's Avatar
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    Default Re: can't get past 3.7ghz

    124 means you need more Vtt which would be FSB Voltage on your board. So try +0.125-0.3 and see if that stops the BSOD

    BSOD 0x00000101 is Vcore, just in case you run into that as well.

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