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Thread: Is my RAM set at its potential?




  1. #1
    Join Date
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    Default Is my RAM set at its potential?

    Hi, ive been putting this off for a while, but i want to make sure im getting the full potential power from my RAM. I dont want to overclock, i just want to make sure im running them at the right settings. For maximum efficiency and power.

    I have a GA-ep45-ud3p motherboard with OCZ Reaper HPC 4gb (2x2gb) 1066 (PC2 8500) ram.

    Im running windows 7 Pro 64 bit. btw.

    Here are some screen shots from CPU Z.







    And heres my cpu screen too, just in case.
    -Antec 900
    -Corsair 750TX Power Supply
    -GA-EP45-UD3P v1.0 w/ F6 bios
    -Q8200 Core 2 Quad Yorkfield @ 2.33GHz --> OCed to 3.2GHz Stable
    -Masscool Ice Cold 7WA001 HSF (30C idle, 57C full load)
    -EVGA GTX 260 896mb
    -OCZ Reaper HPC 2x2GB 1066 DDR2
    -WD Caviar Black 500GB 7200RPM (main)
    -WD Caviar Green 500GB 7200RPM (backup)
    -Win 7 Pro 64 bit

  2. #2
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    Default Re: Is my RAM set at its potential?

    have you tried settng the command rate to 1t? if no luck leave it at 2t
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  3. #3
    Chike is offline Senior Member
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    Default Re: Is my RAM set at its potential?

    Please post a screen capture of MemSet main(click >>) and SPD(click spd) windows, and post BIOS settings, use the template in this post or the one after.

  4. #4
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    Default Re: Is my RAM set at its potential?

    Just from the info you've provided already, no, your RAM isn't set to spec. You have tRAS set as 18, the SPD indicates the modules are rated to tRAS=15.

    Also consider using the 2.4B multiplier to get 1099. It's not a huge overclock, and as long as you're using the max rated voltage for the sticks it is possible. from DDR916 to DDR-1099 will give much more of a performance boost than tweaking timings down, unless you can lower Static tRead. Static tRead makes a huge difference. With your FSB, start by setting tRead=10, then load windows. Using Memset, lower tRead one step at a time and hit apply. The tRead value the PC hard locks on + 1 increment will 99% be the lowest stable tRead. Eg if you hard lock on tRead=7, go into the BIOS and set tRead=8 and go ahead and do some tests.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  5. #5
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    Default Re: Is my RAM set at its potential?

    Ok here is Memset: just fyi (tRAS really is 18, i just clicked the arrow on accident before i took the screeny, its not 19.)



    And here are my bios settings.

    MB Intelligent Tweaker
    Robust Graphics Booster.....................Turbo
    CPU Clock Ratio.................................7x
    CPU Frequency..................................3.2GHz (458x7)

    Clock Chip Control
    Standard Clock Control

    CPU Host Clock Control........................Enabled
    CPU Host Frequency (MHz)...................458
    PCI Express Frequency (MHz.................100
    C.I.A. 2.............................................Disa bled

    Advanced Clock Control
    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 (XMP)...............Disabled
    (G)MCH Frequency Latch......................400 MHz
    System Memory Multiplier.....................2.00D
    Memory Frequency..............................1066 916
    DRAM Time Selectable..........................Manual

    Standard Timing Control
    CAS Latency Time...............................5
    tRCD.............................................. ...5
    tRP'.............................................. ....5
    tRAS.............................................. ..18

    Advanced Timing Control
    tRRD.............................................. ...auto
    tWTR.............................................. ..auto
    tWR............................................... ...auto
    tRFC.............................................. ...auto
    tRTP.............................................. ...auto
    Command Rate (CMD)...........................auto

    Driving Strenght Profiles
    Driving strength...................................auto

    Channel A
    Static tRead Value................................9
    tRD Phase 0 Adjustment.........................auto
    tRD Phase 1 adjustment..........................auto
    tRD Phase 2 Adjustment..........................auto
    tRD Phase 3 Adjustment..........................auto
    Trd2rd (Different Rank)...........................auto
    Twr2wr (Different Rank)..........................auto
    Twr2rd (Different Rank)...........................auto
    Trd2wr (Same/Diff Rank).........................auto
    Dimm 1 clock skew control.......................auto
    Dimm 2 Clock skew control.......................auto
    DDR Write training..................................auto

    Channel B
    Static tRead Value................................9
    tRD Phase 0 Adjustment.........................auto
    tRD Phase 1 adjustment..........................auto
    tRD Phase 2 Adjustment..........................auto
    tRD Phase 3 Adjustment..........................auto
    Trd2rd (Different Rank)...........................auto
    Twr2wr (Different Rank)..........................auto
    Twr2rd (Different Rank)...........................auto
    Trd2wr (Same/Diff Rank).........................auto
    Dimm 1 clock skew control.......................auto
    Dimm 2 Clock skew control.......................auto
    DDR Write training..................................auto

    Motherboard Voltage Control
    Load line calibration................................disable d

    CPU
    CPU Vcore............................................. 1.275v
    CPU Termination.....................................1. 200v
    CPU PLL............................................... .1.500v
    CPU Reference.......................................Au to
    CPU Reference 2.....................................Auto

    MCH/ICH
    MCH Core.............................................1 .260v
    MCH Reference......................................aut o
    MCH/DRAM Ref......................................auto
    ICH I/O................................................a uto
    ICH Core.............................................. 1.200v

    DRAM
    DRAM voltage........................................2.1 00v
    DRAM Termination..................................auto
    Channel A Reference...............................auto
    Channel B Reference................................auto

    Advanced Settings
    Limit CPU Max to 3..................................disabled
    No-execute memory protect.....................disabled
    CPU enhance hald (C1E)..........................disabled
    CPU Thermal Monitor 2 (TM2)...................enabled
    CPU EIST function..................................disabled


    There you guys go.
    Last edited by FonduJack; 11-23-2009 at 07:44 AM.
    -Antec 900
    -Corsair 750TX Power Supply
    -GA-EP45-UD3P v1.0 w/ F6 bios
    -Q8200 Core 2 Quad Yorkfield @ 2.33GHz --> OCed to 3.2GHz Stable
    -Masscool Ice Cold 7WA001 HSF (30C idle, 57C full load)
    -EVGA GTX 260 896mb
    -OCZ Reaper HPC 2x2GB 1066 DDR2
    -WD Caviar Black 500GB 7200RPM (main)
    -WD Caviar Green 500GB 7200RPM (backup)
    -Win 7 Pro 64 bit

  6. #6
    Chike is offline Senior Member
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    Default Re: Is my RAM set at its potential?

    Setting XMP to profile2(or profile1 whatever is there) and standard timing on auto will set appropriate timings for DDR-916 (5-5-5-13)
    If you can use 2.00B multiplier you may be able to use Static tRead Value 8.
    Try to set Driving strength 1066 for both channels and see if that makes any change.
    Run memory benchmark before and after changes and see which give the best results.
    That's about it for no memory OC.

  7. #7
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    Default Re: Is my RAM set at its potential?

    Firstly set tRFC to 15 as specced. If not already set all primary timings manually.

    You can now go ahead and tweak.

    I'd have a go at lowering tRead first. Using Memset like I detailed, find the value that freezes the PC. The stable value is almost always the one above the value that locks the PC. You may have to power off the PSU and hold the power button after the hard lock or a boot loop may occur. The hard lock won't damage anything as long as you let Windows settle before doing it.

    After you have the lowest tRead possible, move to advanced settings. On this motherboard for some reason Command Rate does nothing and the RAM is always at 2T. For the values above this you could mess around calculating what currently is being set via looking at Memset, but why bother farting around? Simply look at the values to the left and set all settings 1 value lower. Now re-boot and bench/test. Repeat this until unstable, then raise each value by one until you encounter the setting that caused instability. Leave the suspect value in a stable position and continue reducing other values again until instability results.

    IMO you're going to get much more gain from stting 2.4B and getting that running stable than running underclocked, unless ofc you can get a good reduction in tRead that could over power any gain made moving up in frequency. Not wanting to OC your RAM slightly is your choice but to me isn't a logical one. Such a tiny OC to avoid drastically underclocking your RAM by over DDR-100 is pefectly acceptable. If my cheap bog standard XMS2 can do it, I'm sure your Reaper can handle it with ease. Check to see if your RAM has an extended voltage policy. Some OCZ stuff does, allowing a small 0.05-0.1V increase while maintaining warranty.

    Edit:
    If it's completely optimal RAM timings you're after, XMP isn't going to give you this. Even if it does set tighter timings it still is somewhat conservative. I firmly believe XMP has no place at all other than for people who don't know what RAM timings are or how to adjust them. Using XMP my system isn't even stable at stock speeds (loading optimised defaults). It takes turning off XMP for things to be stable at the regular 2.8GHz and DDR1066. That speaks volumes for XMP imo.
    Last edited by Psycho101; 11-23-2009 at 08:26 AM.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  8. #8
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    Default Re: Is my RAM set at its potential?

    Wait so do you want me to change tRAS to 15 or tRFC?

    When i installed the memory a while back it said the timings were supposed to be 5 5 5 18.

    and now that i think of it, i wouldnt mind overclocking the RAM a bit, Psycho101.

    and what should i use to test the ram stability?
    Last edited by FonduJack; 11-23-2009 at 09:21 AM.
    -Antec 900
    -Corsair 750TX Power Supply
    -GA-EP45-UD3P v1.0 w/ F6 bios
    -Q8200 Core 2 Quad Yorkfield @ 2.33GHz --> OCed to 3.2GHz Stable
    -Masscool Ice Cold 7WA001 HSF (30C idle, 57C full load)
    -EVGA GTX 260 896mb
    -OCZ Reaper HPC 2x2GB 1066 DDR2
    -WD Caviar Black 500GB 7200RPM (main)
    -WD Caviar Green 500GB 7200RPM (backup)
    -Win 7 Pro 64 bit

  9. #9
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    Default Re: Is my RAM set at its potential?

    Sorry, I meant tRAS. According to the SPD, they have been programmed with this in mind. The specs on OCZ's site do state 18 though which is somewhat confusing. Either way, you should be fine at 15.

    Consider using the full rated 2.2V for now, then lowering it if you desire after you get stability with your chosen settings.

    Perhaps your first step now (if OC is where you want to go) is to temporarily raise tRead to 10, leaving Advanced Timings on auto and try the 2.40B multi out. This should provide more benefit than tweaking alone. If all boots fine, do the Memset tRead trick to find your minimum tRead and give it a good stress over night if poss with Prime/Orthos Large FFT or OCCT large data set.

    If this goes well, precede to tweak timings down as discussed. A combination of not having the RAM underclocked and tightening timings as much as possible will maximise your results nicely.
    Coolermaster CM 690 II advance Case
    Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail
    P55A-UD4 v2.0 @ F14
    Core i5 760 @ 20 x 201, 4.02GHz
    TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db .
    2 x 2GB Mushkin Ridgeback (996902), @ 7-10-8-27, 2010-DDR, 1.66v
    2 x Gigabyte GTX 460 1024MB in SLI (Pre OC'd to 715MHz core and 1800MHz VRAM) @ 850 Core / 4100 Mem.
    Intel X25-M Boot Drive (OS and Programs) 200MB/s Read & 90MB/s Write
    Corsair X32 200MB/s Read & 100MB/s Write
    WD Caviar Blue 640GB C (Steam, Games, Storage, Temp Files & Folders, etc)
    Samsung F3 500GB Backup/Images
    Noctua 1300RPM 19dB case fan (rear extraction)
    3 x 140 MM Coolermaster LED fans (one front intake, one top extraction, one side intake)
    Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050

  10. #10
    Join Date
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    Default Re: Is my RAM set at its potential?

    ok im gonna change those settings now.

    Ill use prime95...what kind of torture test should i do?

    Blend or should i make a custom?

    if custom what settings.
    -Antec 900
    -Corsair 750TX Power Supply
    -GA-EP45-UD3P v1.0 w/ F6 bios
    -Q8200 Core 2 Quad Yorkfield @ 2.33GHz --> OCed to 3.2GHz Stable
    -Masscool Ice Cold 7WA001 HSF (30C idle, 57C full load)
    -EVGA GTX 260 896mb
    -OCZ Reaper HPC 2x2GB 1066 DDR2
    -WD Caviar Black 500GB 7200RPM (main)
    -WD Caviar Green 500GB 7200RPM (backup)
    -Win 7 Pro 64 bit

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