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OC my Asus P5e3 DDR3 2x2GB + Q9450 2.66GHz

By Keesi
Jan 25, 2011
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  1. Hi all,

    I would like to OC this system to about 3.2ghz and some nice memory speeds and timings. But i keep running into a wall i got the pc info below and Bios below that.

    PC information:
    CPU Arch : 1 CPU - 4 Cores - 4 Threads
    CPU PSN : Intel Core2 Quad CPU Q9450 @ 2.66GHz
    CPU EXT : MMX, SSE (1, 2, 3, 3S, 4.1), EM64T, VT-x
    CPUID : 6.7.7 / Extended : 6.17
    CPU Cache : L1 : 4 x 32 / 4 x 32 KB - L2 : 2 x 6144 KB
    Core : Yorkfield (45 nm) / Stepping : C1

    Freq : 2879.87 MHz (359.98 * 8)
    MB Brand : Asus
    MB Model : P5E3 Deluxe
    NB : Intel X38 rev 01
    SB : Intel 82801IR (ICH9R) rev 02

    RAM : 4096 MB DDR3 Dual Channel
    RAM Speed : 720 MHz (1:2) @ 8-8-8-20
    Slot 1 : 2048MB (10700)
    Slot 1 Manufacturer : Kingston
    Slot 2 : 2048MB (10700)
    Slot 2 Manufacturer : Kingston

    Bios settings:
    Ai Overclock Tuner Manual
    CPU Ratio Control Manual
    CPU Ratio Setting 8
    FSB Strap to North Bridge 266
    FSB Frequency 360
    PCIE Frequency 105
    DRAM Frequency DDR-1441
    DRAM Command Rate 1T
    DRAM Timing Control Manual
    DRAM Timings
    CAS# Latency 8 DRAM Clocks
    RAS# to CAS# Delay 8 DRAM Clocks
    RAS# PRE Time 8 DRAM Clocks
    RAS# ACT Time 20 DRAM Clocks
    RAS# to RAS# Delay Auto
    REF Cycle Time Auto
    WRITE Recovery Time Auto
    READ to PRE Time Auto
    READ to WRITE Delay(S/D) Auto
    WRITE to READ Delay(S) Auto
    READ to READ Delay(S) Auto
    READ to READ Delay(D) Auto
    WRITE to WRITE Delay(S) Auto
    WRITE to WRITE Delay(D) Auto
    DRAM Static Read Control Disabled
    DRAM Dynamic Write Control Disabled
    Ai Clock Twister Strong
    Ai Clock Skew for Channel A Auto
    Ai Clock Skew for Channel B Auto
    Ai Transaction Booster Enabled
    Boost Level 2
    Voltage Settings
    CPU Voltage 1.29375
    CPU PLL Voltage 1.50
    FSB Termination Voltage 1.28
    DRAM Voltage 1.60
    NB Voltage 1.41
    SB Voltage Auto
    Clock Over-Charging Voltage Auto
    Load-Line Calibration Disabled
    CPU GTL Voltage Reference Auto
    NB GTL Voltage Reference Auto
    CPU Spread Spectrum Disabled
    PCIE Spread Spectrum Disabled

    thx for your time,

  2. LinkedKube

    LinkedKube TechSpot Project Baby Posts: 3,481   +44

    Increase your cpu voltage to 1.33 and increase you cpu frequency to 3.0 ghz and go from there

    Sent from my DROIDX using Tapatalk
  3. dividebyzero

    dividebyzero trainee n00b Posts: 4,891   +1,262

    Did you set the CPU voltages for the overclock you already have, or did you rely on overclocking software?

    If you set them manually and these are the lowest stable voltages then the CPU may not be too overclock friendly. Have you tried incrememtally lowering the voltages on the OC you already have?
    What CPU cooling are you using and are you monitoring the CPU and northbridge temps?

    For example in a comparable system...
    My secondary system uses a Q9400 (fairly similar to yours barring the reduced L2 cache), and obviously the system is DDR2 (P45). The CPU is a good OC'er on low voltage, but by no means a "golden chip". Just a LOT of benchmarking involved.

    The settings for the attached screenshot/OCCT stability test...
    CPU Frequency 3336MHz ( Host freq./FSB 417) -same settings work for 3.4G/425FSB
    CPU Vcore (BIOS) 1.25625v (actual 1.232v, Vdroop 1.210v at max load. VID 1.2375v)
    CPU termination (vtt) 1.2400v
    CPU PLL 1.54v
    MCH (Northbridge) core: 1.220v
    ICH I/O 1.550v
    ICH Core 1.140v

    If you haven't already I would disable EIST and C1E, set PCI-E frequency to 100MHz, and set your RAM at 1:1 divider at least until you have a stable OC that you're happy with. You can change the memory strap after this knowing that your initial CPU overclock voltage isn't being compromised by excessive northbridge voltage.

    Attached Files:

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