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Thread: Recommendations for O/C




  1. #1
    Join Date
    Nov 2009
    Location
    Chicago
    Posts
    2

    Default Recommendations for O/C

    New here, first post. I switched from a e8400 to a Q9550 since Microcenter had a sale for $169, in the process, Abit IP35Pro took a dump. So, picked up a GA-EP45-UD3P after reading reviews. Overclocking is a little more complex on P45 chipset. After looking through forums, I have the settings below. I have ran prime 95 for 2 hours with no issues, as well as OCCT.

    Normal temps around 36-40, and 55-60 under OCCT load.

    I tried to go to 3.8 (8.5 x 450), and BSOD'd during OCCT. I think my memory may be limiting me. Any thoughts or suggestions?



    CPU = Q9550 E0
    motherboard = GA-EP45-UD3P, Revision 1.6
    BIOS Version = Fb
    Ram = Corsair CMS6400C4 4x 1Gb


    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Fast
    CPU Clock Ratio ..........................: 8
    Fine CPU Clock Ratio.....................:.+0.5
    CPU Frequency ...........................: 3.60

    Clock Chip Control Standard Clock Control
    CPU Host Clock Control..................: [Enabled]
    CPU Host Frequency (Mhz) ............: 424 Mhz

    PCI expressFrequencyMhz) .........:100
    C.I.A.2 .................................:[Disabled]

    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800
    PCI Express Clock Drive.................: <<< 900
    CPU Clock Skew (ps)....................: <<< 0
    MCH Clock Skew (ps)...................: <<< 0

    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 2.00D
    Memory Frequency (Mhz) ..............: 848
    DRAM Timing Selectable ................: [Manual]
    Standard Timing Control
    CAS Latency Time........................ 5
    tRCD ......................................... 5
    tRP'........................................... 5
    tRAS.......................................... 15

    Advanced Timing Control
    tRRD........................................... 3
    tWTR.......................................... 3
    tWR............................................ 6
    tRFC...........................................42
    tRTP........................................... 3
    Command Rate (CMD) ....................:2 D

    Motherboard Voltage ControlCPU
    CPU Vcore….……….........................: 1.2
    CPU Termination…..... 1.200V*.......: 1.20
    CPU PLL…………………....1.500V*.......: 1.5
    CPU Referen.…………....0.755V*.......: Auto
    CPU Reference2………,,0.800V*.......:<<< ????

    MCH/ICH
    MCH Core…………….....1.100V...........: 1.16
    MCH Reference….…….0.760V...........; .76
    MCH/DRAM Ref.…......0.900V...........: .90
    ICH I/O……………….....1.500V............: 1.50
    ICH Core…………...……1.100V............: 1.10

    DRAM
    DRAM Voltage ……....1.800V............: 2.10
    DRAM Termination .…0.900V............: <<< Leave
    Channel A Reference 0.900V............: <<< Leave
    Channel B Reference 0.900V............: <<< Leave

    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................: Enabled
    Integrated PeripheralsLegacy USB Storage Detect ..............[Disabled]

    __________________
    Last edited by fillyo; 11-15-2009 at 08:56 AM.
    __________________________________________________ ___
    Gigabyte GA-EP45-UD3P r 1.6, Fb, Q9550 @ 3.6 Ghz, Zalmon CPS9500, Silverstone ST60F 600W PSU, eVGA 8800GT, Corsair XMS PC6400C4 (4x1GB), 150GB Velociraptor, M-Audio Revo 5.1, Lian Li PC80

  2. #2
    Chike is offline Senior Member
    Join Date
    Jun 2009
    Location
    Israel
    Posts
    6,531

    Default Re: Recommendations for O/C

    I had 2 of these sticks at 1066 with 5-5-5-15 timings, though it was only 333FSB i doubt they are limiting you under 1000.
    MCH & CPU Vcore/Termination may need to be increased.
    Use CPU Ratio 8 and increase FSB, when you get 450 stable+- increase CPU Ratio.
    Try MCH Core up to 1.26, CPU Termination up to 1.24, Vcore as needed for 3.8GHz.
    Other settings may need tweaking, such as CPU/MCH Clock Skew, try 50/100 for each with the other on 0.
    You can increase CPU PLL one notch "just in case".

    Are all channel settings on auto?

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