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Thread: OCing Q6600 and 8Gigs of ram on EP45-UD3P




  1. #1
    Join Date
    Feb 2009
    Posts
    1

    Default OCing Q6600 and 8Gigs of ram on EP45-UD3P

    To start off I want to thank Lsdmeasap for his efforts. I'm currently running at 3.4 after using settings he posted in another thread with only a few changes, gave me a great starting point. I'm not 100% stable yet but getting there. One of my cores errored out running Prime95 after 45 minutes, the other three ran until I had to stop it, about 5.5 hours.

    I was specifically curious about running 8 gigs of memory and the tRFC value. I do not pretend to understand very much of these settings, though I am trying, but it was posted that this should be higher when you run more ram, I'm just not sure how hi for 4 x 2GB.

    My current settings:
    Code:
    MB Intelligent Tweaker(M.I.T.)
    Robust Graphics Booster ...............: Auto
    CPU Clock Ratio ..........................: 8x
    Fine CPU Clock Ratio.....................:.0
    CPU Frequency ...........................: 3.40GHz( 426x8)
    
    
    Clock Chip Control 
    Standard Clock Control
    CPU Host Clock Control..................: [Enabled] 
    CPU Host Frequency (Mhz) ............: 426Mhz
    PCI Express Frequency (Mhz) .........:Set to 100
    
    C.I.A.2 .................................:[Disabled]
    
    
    Advanced Clock Control [Press Enter]
    CPU Clock Drive...........................: <<< 800mV
    PCI Express Clock Drive.................: <<< 900mV
    CPU Clock Skew (ps)....................: <<< 0ps
    MCH Clock Skew (ps)...................: <<< 0ps
    
    
    DRAM Performance Control
    Performance Enhance...................: [STANDARD]
    Extreme Memory Profile (X.M.P.).....: Disabled
    (G)MCH Frequency Latch...............: [Auto]
    System Memory Multiplier ..............: 2.40B
    Memory Frequency (Mhz) ..............: 1066  1022
    DRAM Timing Selectable ................: [Manual]
    
    Standard Timing Control
    CAS Latency Time........................5
    tRCD .........................................5
    tRP'...........................................5
    tRAS..........................................18
    
    Advanced Timing Control
    tRRD...........................................4
    tWTR..........................................5
    tWR............................................6
    tRFC...........................................68
    tRTP...........................................5
    Command Rate (CMD) ....................:2
    
    Driving Strength Profiles
    Driving Strength ............................1066
    
    Channel A
    Static tRead Value.........................:12
     tRD Phase0 Adjustment...................:(1) Auto
    tRD Phase1 Adjustment...................:(0) Auto
     tRD Phase2 Adjustment .................:(0) Auto
     tRD Phase3 Adjustment..................:(0) Auto
    Trd2rd(Different Rank)....................:(8) Auto 
    Twr2wr(Different Rank)...................:(8) Auto 
    Twr2rd(Different Rank)...................:(7) Auto 
    Trd2wr(Same/Diff Rank)..................:(9) Auto 
    Dimm1 Clock Skew Control...............:Auto  ps
    Dimm2 Clock Skew Control...............:Auto  ps
    DDR Write Training.....................:Auto
    
    Channel B
    Static tRead Value.........................:12
     tRD Phase0 Adjustment...................:(1) Auto
    tRD Phase1 Adjustment...................:(0) Auto
     tRD Phase2 Adjustment .................:(0) Auto
     tRD Phase3 Adjustment..................:(0) Auto
    Trd2rd(Different Rank)....................:(8) Auto 
    Twr2wr(Different Rank)...................:(8) Auto 
    Twr2rd(Different Rank)...................:(7) Auto 
    Trd2wr(Same/Diff Rank)..................:(9) Auto 
    Dimm1 Clock Skew Control...............:Auto  ps
    Dimm2 Clock Skew Control...............:Auto  ps
    DDR Write Training.....................:Auto
    
    Motherboard Voltage Control
    Voltage Type.………... Manual
    CPU
    CPU Vcore….……….........................:1.425
    CPU Termination…..... 1.200V*.......: 1.340
    CPU PLL…………………....1.500V*.......: 1.610
    
    CPU Referen.…………....0.755V*.......: (.760) Auto
    
    CPU Reference2………,,0.800V*.......: N/A
    
    MCH/ICH
    MCH Core…………….....1.100V...........: 1.280
    MCH Reference….…….0.800V...........; (.760) Auto
    MCH/DRAM Ref.…......0.900V...........: (.900) Auto
    ICH I/O……………….....1.550V............: 1.610
    ICH Core…………...……1.100V............: 1.200
    
    DRAM
    DRAM Voltage ……....1.800V............: 2.100
    DRAM Termination .…0.900V............: (.900) Auto
    Channel A Reference 0.900V............:(.900) Auto
    Channel B Reference 0.900V............:(.900) Auto
    
    Advanced Settings
    Limit CPUID Max. to 3.....................: [Disabled]
    No-Execute Memory Protect............: [Enabled]
    CPU Enhanced Halt (C1E)................: [Disabled]
    C2/C2E State Support....................: N/A
    x C4/C4E State Support..................: N/A
    CPU Thermal Monitor 2(TM2) ...........: [Enabled]
    CPU EIST Function.........................: [Disabled]
    Virtualization Technology................: [Disabled] Enabled if you use Vmware/Virtual PC
    
    Integrated Peripherals
    Legacy USB Storage Detect ..............[Disabled] *Note* Must be enabled to flash from USB
    The highest my temps got was 61c during a 5.5 hour run. That seems acceptable. I don't have any kind of clock goal I just want to keep pushing it as high as I can on air and still be stable and cool enough not to break things. It is a lot of fun even if I don't understand it all...yet.

  2. #2
    Chucko is offline Member
    Join Date
    Jan 2009
    Location
    6 blocks from AMD HQ
    Posts
    112

    Default Re: OCing Q6600 and 8Gigs of ram on EP45-UD3P

    My (limited) understanding is that tRFC needs to be > 127.5 ns for 1Gbit RAM, >195 ns for 2Gbit devices. Most 2GB DIMMs are built with 1Gbit devices. 68 seems about right for your settings.

    I'm running 4x2GB (OCZ Reaper HPC 1066) and I'm finding I need to back off the CAS latency to get things stable. I'm a long way from 1066MHz, but I hope to get there eventually.

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