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Thread: Help with OC q9450 on P45 DS3R




  1. #1
    Join Date
    Aug 2008
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    Default Help with OC q9450 on P45 DS3R

    Here are the specs for my system:
    - Q9450
    - P45 DS3R
    - G. skill DDR2 800 PC6400 2x2GB
    - Xigmatek CPU Cooler

    I managed to overclock my q9450 to 3.2GHz (400x8) and it is stable (ran prime95 for 24 hours with no error)

    When I tried to overclock at 420x8, prime95 ran for about 6 hours and then got an error on one core. Other cores were still running fine.

    The temperatures in Real Temp for 4 cores at full load are between 56 and 60 C. CPU-Z shows 1.296V

    Here are the bios settings (version F9):
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.36Ghz (420x8)

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 420Mhz
    PCI Express Frequency (Mhz) .........:100
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 50
    MCH Clock Skew (ps)...................: <<< 150

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: 400
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 840
    DRAM Timing Selectable ................: [Manual]
    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15
    Advanced Timing Control
    tRRD...........................................Aut o
    tWTR.......................................... Auto
    tWR............................................Aut o
    tRFC...........................................Aut o
    tRTP...........................................Aut o
    Command Rate (CMD) ....................:Auto
    Channel A
    Static tRead Value.........................Auto
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Channel B
    Static tRead Value.........................:Auto
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.4
    CPU Termination…..... 1.200V*.......: <<< 1.4
    CPU PLL…………………....1.500V*.......: <<< 1.61
    CPU Referen.…………....0.76V*.......: <<< 0.886

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.32
    MCH Reference….…….0.800V...........; <<< 0.886
    MCH/DRAM Ref.…......0.900V...........: <<< Auto
    ICH I/O……………….....1.550V............: <<< Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.9
    DRAM Termination .…0.900V............: <<< Auto
    Channel A Reference 0.900V............: <<< Auto
    Channel B Reference 0.900V............: <<< Auto
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

    What is the possible cause for the error on one core after 6 hours of prime95? Is there anything that I can tweak so I can overclock at 420x8 or higher? Thanks for the help

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: Help with OC q9450 on P45 DS3R

    I would suggest you test these changes and use memtest86+ to test the ram as you tweak it Because Auto for all of that is for sure not the best and likely is causing you issues as well>>>>

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.36Ghz (420x8)

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 420Mhz
    PCI Express Frequency (Mhz) .........:100
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 50 << Try 100
    MCH Clock Skew (ps)...................: <<< 150 <<< Try 200

    I use 100 and 200 for 425x9

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: 400
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 840
    DRAM Timing Selectable ................: [Manual]
    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15
    Advanced Timing Control
    tRRD...........................................3-4
    tWTR.......................................... 3-4 (May need 8-12 for first boot changing from Auto) same applies with below range in Parentheses

    tWR............................................6-8 (May need 8-14 See above ^^ Comment)
    tRFC...........................................52-62
    tRTP...........................................3-6
    Command Rate (CMD) ....................:2

    Set driving strength profile to 800, you may also test 1066

    Channel A
    Static tRead Value.........................8-10
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Channel B
    Static tRead Value.........................:8-10
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.4 << may need a tad more? But likely not since you were using all Auto above I would think that is the main part of your problems.

    CPU Termination…..... 1.200V*.......: <<< 1.3-1.4 (1.34-1.38 is best for under 480 FSB)
    CPU PLL…………………....1.500V*.......: <<< 1.56-1.61
    CPU Referen.…………....0.76V*.......: <<< 0.886 >>> Set as per below

    CPU Referen.…………....0.755V*.......: <<< .61% Of Vtt (Termination above)
    CPU Reference2………,,0.800V*.......:<<< .67% Of Vtt (Termination above)

    MCH/ICH
    MCH Core…………….....1.100V...........: << 1.32 << May need only 1.2-1.25
    MCH Reference….…….0.800V...........; <<< 0.886
    MCH/DRAM Ref.…......0.900V...........: <<< Auto
    ICH I/O……………….....1.550V............: <<< Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.9 << May need 2.0, is this 1.9 spec ram? If so 1.9 should be fine then

    DRAM Termination .…0.900V............: <<< Auto
    Channel A Reference 0.900V............: <<< Auto
    Channel B Reference 0.900V............: <<< Auto
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

  3. #3
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    Default Re: Help with OC q9450 on P45 DS3R

    I ran memtest86+ and there is no error. When I ran prime95, two cores stop right away. What else can I try? Here are the new setting:

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.36Ghz (420x8)

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 420Mhz
    PCI Express Frequency (Mhz) .........:100
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 100
    MCH Clock Skew (ps)...................: <<< 200

    I use 100 and 200 for 425x9

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: 400
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 840
    DRAM Timing Selectable ................: [Manual]
    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15
    Advanced Timing Control
    tRRD...........................................4
    tWTR.......................................... 4

    tWR............................................8
    tRFC...........................................62
    tRTP...........................................6
    Command Rate (CMD) ....................:2

    Set driving strength profile to 800

    Channel A
    Static tRead Value.........................10
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Channel B
    Static tRead Value.........................:10
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.4
    CPU Termination…..... 1.200V*.......: 1.38
    CPU PLL…………………....1.500V*.......: 1.57
    CPU Referen.…………....0.76V*.......: 0.844
    MCH/ICH
    MCH Core…………….....1.100V...........: 1.32
    MCH Reference….…….0.800V...........; 0.914
    MCH/DRAM Ref.…......0.900V...........: <<< Auto
    ICH I/O……………….....1.550V............: <<< Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.9
    DRAM Termination .…0.900V............: <<< Auto
    Channel A Reference 0.900V............: <<< Auto
    Channel B Reference 0.900V............: <<< Auto
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

  4. #4
    Lsdmeasap's Avatar
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    Default Re: Help with OC q9450 on P45 DS3R

    Well any core stopping right away is for sure CPU related and normally voltages. What do you get in windows in CPU-z for idle voltage out of that 1.4 set in the BIOS? Could need less as well which is likely, so I just wondered what you get in windows

    I tossed in some memory suggestions, but they are not the issue you are having it is cpu volt related. As for memory you may also want to set Driving strength profile to 800 or 1066

    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: [Auto]
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.36Ghz (420x8)

    Clock Chip Control
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 420Mhz
    PCI Express Frequency (Mhz) .........:100
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 100 << Try Nothing -50
    MCH Clock Skew (ps)...................: <<< 200 <<< Try 100-150

    I use 100 and 200 for 425x9

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: 400
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 840
    DRAM Timing Selectable ................: [Manual]
    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................15
    Advanced Timing Control
    tRRD...........................................4 << Try 3
    tWTR.......................................... 4

    tWR............................................8
    tRFC...........................................62 << try 52
    tRTP...........................................6 << Try 3
    Command Rate (CMD) ....................:2

    Set driving strength profile to 800

    Channel A
    Static tRead Value.........................10 << Try 8
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Channel B
    Static tRead Value.........................:10 << Try 8
    tRD Phase0 Adjustment...................:Auto
    tRD Phase1 Adjustment...................:Auto
    tRD Phase2 Adjustment .................:Auto
    tRD Phase3 Adjustment..................:Auto
    Trd2rd(Different Rank)....................:Auto
    Twr2wr(Different Rank)...................:Auto
    Twr2rd(Different Rank)...................:Auto
    Trd2wr(Same/Diff Rank)..................:Auto
    Dimm1 Clock Skew Control...............:Auto
    Dimm2 Clock Skew Control...............:Auto
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................: 1.4 <<
    CPU Termination…..... 1.200V*.......: 1.38 << Try 1.34-1.36 1.38 may be too high
    CPU PLL…………………....1.500V*.......: 1.57
    CPU Referen.…………....0.76V*.......: 0.844 << Try .81-.82 (Should always be .61% of vtt (Termination))
    MCH/ICH
    MCH Core…………….....1.100V...........: 1.32 <<< Try 1.2 or 1.25
    MCH Reference….…….0.800V...........; 0.914
    MCH/DRAM Ref.…......0.900V...........: <<< Auto
    ICH I/O……………….....1.550V............: <<< Auto

    DRAM
    DRAM Voltage ……....1.800V............: 1.9
    DRAM Termination .…0.900V............: <<< Auto
    Channel A Reference 0.900V............: <<< Auto
    Channel B Reference 0.900V............: <<< Auto
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: [Disabled]
    x C4/C4E State Support..................: [Disabled]
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled]

  5. #5
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    Default Re: Help with OC q9450 on P45 DS3R

    For Vcore=1.4, CPU-Z shows 1.36 at iddle

    I also tried to set Vcore=1.425 and get 1.376 at iddle. But at least one core stops right away when I run prime

  6. #6
    Lsdmeasap's Avatar
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    Default Re: Help with OC q9450 on P45 DS3R

    Did you try the lower Voltages I suggested above? Is that 1.9V spec ram? You may want to try 2.0, but like I said I really think it is a CPU or NB related voltage issue

    Have you tried less Vcore yet? Sometimes too much can cause a quick error as well

    May also want to try this instead of above suggestion >>>
    CPU Clock Skew (ps)....................: <<< 100 << Try 150
    MCH Clock Skew (ps)...................: <<< 200 << Try 250

    What is the temp before the error, or is it to quick to even get hot? Just to be sure which I doubt this is the issue, is your ram memtest86+ stable at those settings you were/are trying?

  7. #7
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    Default Re: Help with OC q9450 on P45 DS3R

    I tried the followings:
    1. Set CPU Termination between 1.34-1.36: 2 cores went down as soon as I started prime
    2. Set MCH Core between 1.2-1.25: Windows boots up and then shuts down by itself after a few minutes
    3. Set tRead value for channels A and B to 8: Get bios error. The board resets itself to default settings
    4. Set tRRD=3; tWTR=4; tWR=8; tRFC=52: Windows would not boot

    Memtest86+ is stable. The 2 cores went down right away so it was too quick for the temp to get hot.

    What do all these behaviors mean?

  8. #8
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    Default Re: Help with OC q9450 on P45 DS3R

    I have different board Gigabyte GA-X48-DS4 W/Q9450 1.34 volts is high for that CPU Intel say 1.3625 is MAX.I have 3.6@1.23 volts cpu-z load 1.20 You will get post restarts whith to much power .The way i got system stabel was CPU first ram auto or stock till you get CPU 100%.Then went and tweeked system.If your board keeps in line with other Gigabyte board low voltage seems to be better.Boards like ASUS need 1.36-1.40+ to get same overclock speeds.
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  9. #9
    Lsdmeasap's Avatar
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    Default Re: Help with OC q9450 on P45 DS3R

    We are talking termination voltage, but he knows what CPU voltage he can use. And the P45 has average around a .Vdroop anyway

    So, what Vcore was you trying the above at?

  10. #10
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    Default Re: Help with OC q9450 on P45 DS3R

    Vcore was set at 1.4

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