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Thread: Problematic X48T-DQ6 Overclock

  1. #1
    Join Date
    Oct 2008

    Default Problematic X48T-DQ6 Overclock

    Hi there,

    im having problems to keep my overclock stable.
    I've been reading forums (mushkin, gigabyte,oc'er forum, guides etc) for weeks now without luck.

    I hope someone has got an idea whats keeping it back.

    First off my spec:
    CPU: Intel Core 2 Quad Q9550
    MB: X48T-DQ6 F5 Bios
    RAM: 4x Mushkin 996601 (8GB RAM) XP3-12800 DDR3 - Mushkin Enhanced
    CPU Cooler: Xigmatek HDT-S1283
    Case Coolers: 5x Scythe STREAM SY1225SL12M @720rpm
    Case: Antec 182p
    GPU: ATI Radeon 4870 512MB (not oc'd)
    HDD: SATA WD Velociraptor (GLFS) 300GB @ ICH9
    HDD: SATA Seagate 1TB @ ICH9
    PSU: Corsair HX620W

    Monitoring done with Scythe Kaze Master and CoreTemp
    Stability Test done with memtest86+ and Prime95 64bit
    OS: Windows Vista Ultimate 64bit

    My problem is that once i overclock it and run a Prime95 for over 12hours+ stable without any issues. On the next day i startup my rig when i get from work and do simple i-net researches and watching video clips and short avi's my system freezes and cracking sounds appears out of my headphones. :( Why is it stable for heavy processing on one day and on the other day it hangs on simple tasks?

    Robust Graphics Booster___________ [Standard]
    CPU Clock Ratio ____________ [8]
    Fine Clock Ratio ____________[0.5]
    CPU Host Clock Control_ [Enabled]
    CPU Host Frequency (MHz)__________ [400]
    PCI Express Frequency (Mhz)_______ [100]
    C.I.A. 2__________________________ [Disabled]
    Performance Enhance________________[Standart]
    System Memory Multiplier____(SPD)__[4.00C]
    Memory Frequency (Mhz)_____________1600
    DRAM Timing Selectable_______ SPD __ [Manual]
    CAS Latency Time________________ 7
    Dram RAS# to CAS# Delay_________ 7
    Dram RAS# Precharge Delay_______6
    Precharge Delay (tRAS)__________ 18
    ACT to ACT Delay (tRRD)_________ 5
    Rank Write to READ Delay________ 10
    Write to Precharge Delay_________ 24
    Refresh to ACT Delay______________ 60
    Read to Precharge Delay__________ 8
    Static tRead Value_______________[Auto]
     Static tRead Phase Adjust________ [Auto]
    Command Rate(CMD)_________________[2T]
    CPU/PCIEX Clock Driving Control [800mV]
    CPU Clock Skew Control [normal]
    GMCH Clock Skew Control [Normal]
    System Voltage Control____ [Manual]
    DDR2 OverVoltage Control__ [+0.40V]
    PCI-E OverVoltage Control_ [+0.10V]
    FSB OverVoltage Control___ [+0.10V]
    (G)MCH OverVoltage Control [+0.250V]
    Loadline Calibration_______[Disabled]
    CPU Voltage Control_______ [1.28750V]
    CPU settings:
    No-Execute Memory Protect [Enabled]
    CPU Enhance Halt (C1E) [Disabled]
    CPU Thermal Monitor [Enabled]
    CPU EIST Function [Disabled]
    Virtual. Tech [Enabled] (Im running multiple VMWare Workstation's for research purpose, im a systembuilder/system integrator for a living.)
    I set my CPU Voltage Control to 1.28750V as i get a correct Core Voltage off 1.232-1.248 at Idle. Which is my VID 1.2500V.
    Last edited by Celox; 02-14-2009 at 08:09 PM.

  2. #2
    Join Date
    Sep 2008

    Default Re: Problematic X48T-DQ6 Overclock

    This thread is a great resource for X48T DQ6 overclocking:
    Gigabyte X48T DQ6 Living Review - Clunk's Forums.

    Try increasing RAM timings. Especially tRead (aka tRD aka Performance Level). Use Memset to check your current value on auto and then increase it

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