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Thread: "1900mhz oc memory" and "2000mhz supported"




  1. #1
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    Default "1900mhz oc memory" and "2000mhz supported"

    It's a question that's been burning me up for ages...

    Under what conditions are these claims achievable? My p45t extreme will not boot with ram over 1600mhz yet packaging and bios updates say it "should".

    What is the loosest timing settings I can use as a start point to see if it will actually boot ( so I'm not just wasting time throwing numbers at it ).

    Ps I have tried 2 different sets of ram ( gskill 1600 cl6 and mushkin 2000 cl something) and neither will do it yet I have it happy with all 4 sticks at 1560ish MHz 6-7-6-17 ??

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
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    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

  2. #2
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    i have a ticket in with gigabyte main site support, posted same question on 2 other forums and even called my local computer shops and so far no answers.... :S

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
    current:-

    ga-ep45t extreme
    QX9650 + ek plexi waterblock
    G.skill DDR3 Pi 12800cl6 @1.6v
    Silverstone strider 1000w 80amp
    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

  3. #3
    profJim's Avatar
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    I see several possible problems:
    .... yet I have it happy with all 4 sticks at 1560ish MHz 6-7-6-17 ??
    • tRas = 17 is probably too tight with 6-7-6 timings, try tRas = 20 - 22.
    • Are you mixing 2 different brands/speeds of 2 x 2GB kits and trying for > 1600MHz?
    • Mixing different brands or memory speeds often won't work.
    • Your mobo might not be stable with 8GB of memory at 1600MHz or higher speeds.
    • Did you try Chike's previous suggested setting with a somewhat lowered cpu multiplier while you're trying for > 1600 MHz?
    • Based on your clock drive settings, it looks like you have loaded Fail-Safe defaults, not Optimized defaults.
    • Performance Enhance = Turbo shouldn't be used with high overclocks. Setting this to Standard should help, but you will have to manually make additional memory timing changes.
    Please include a link to the full specifications for each memory kit.
    Also include a screen-shot for the Memset SPD programmed values for each memory kit.
    This will show the suggested pre-programmed "guaranteed" memory timings and dram voltage values at several different memory speeds.

    It will help if you post your current bios settings and the screen-shot in step #4, http://forums.tweaktown.com/gigabyte...tml#post295784, post #5.

    **edit** In your other thread where the LinX/IBT GFlops scores dropped dramatically, this was probably due to your unstable applied bios settings being reset to "safe" default speeds.
    Last edited by profJim; 11-01-2010 at 07:26 PM. Reason: more info
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  4. #4
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    i have tried the sticks in singles and their separate pairs, i just thought i'd let you guys know what it will handle ( mismatched, 8gb, really tight timings just make sure its under 1600 ). i did try lower multi's.

    i received my new toy in the mail today ( qx9650 ) so i'll put in the 2000mhz mushkin ridgebacks, reset optimized defaults and do some experimenting :)

    i did get word that while "supported" nothing over 1333 is guaranteed.. still can't understand how they pick these memory speed numbers, and how they can get away with the obviously false claims...
    Last edited by Ben_charm; 11-01-2010 at 10:01 PM.

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
    current:-

    ga-ep45t extreme
    QX9650 + ek plexi waterblock
    G.skill DDR3 Pi 12800cl6 @1.6v
    Silverstone strider 1000w 80amp
    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

  5. #5
    profJim's Avatar
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    i did get word that while "supported" nothing over 1333 is guaranteed.. still can't understand how they pick these memory speed numbers, and how they can get away with the obviously false claims...
    supported probably means under ideal circumstances with a very limited memory selection

    From what I've seen in our forum, P45 DDR3 boards seem to top out at about 1600MHz under ideal circumstances.
    8GB of "mismatched" memory at 1600MHz on a P45 mobo sounds pretty damn good to me ;)

    The Mushkin forums are excellent, see if they have any suggestions if you feel compelled to run with higher memory speeds with looser memory timings.

    I'd be interested to see the SPD screen-shots for each memory kit.
    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  6. #6
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    Yeah I had a feeling 1600mhz would be the wall as p45t's were just ddr2 boards with ddr3 sockets jammed on. The spd screenies I'll post tomorrow for you. It'll be a big day with plenty of restarts LOL

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
    current:-

    ga-ep45t extreme
    QX9650 + ek plexi waterblock
    G.skill DDR3 Pi 12800cl6 @1.6v
    Silverstone strider 1000w 80amp
    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

  7. #7
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    The t version motherboards aren't DDR2 boards with different DIMM sockets, the P45 chipset has native support for DDR2 and/or DDR3 depending on how the board maker wants to utilize the chipset.

    P45 however isn't all that great a platform for handling DDR3. It's an early implementation and was designed for DDR3 of that era, some of which had voltage ratings of 2.0V or more for the very fast (1600+) kits. Any relatively new DDR3 RAM, especially low voltage kits (1.65V and lower) may or may not over clock much beyond 1333 which is the maximum guaranteed speed (333 FSB x 4.0). Speeds of over 1600 definitely aren't a false claim as they have used the qualifier "up to" which means basically "you get what you get, no promises". This is the same even with more contemporary chipsets like P55 and X58 or more accurately Core i3, i5 and i7's IMC. Even now, the maximum supported speed is still 1333 and some CPU's only support a maximum of 1066 oficially without Bclk increases.

    Another limiting factor is the CPU used. to hit DDR 2000 you need 500 FSB with a 4.00 strap. The RAM may be able to do 2000MHz but the CPU may not be handling the 500 FSB well. Not saying this is the case with your CPU, just trying to make this explanation as complete as possible.

    When it comes to performance in the real world there will be no difference between a P45 running 1600 DDR and 2000 DDR. the difference would only be evident in benchmarks that specifically test RAM bandwidth. Even then a FSB of 500 may not be enough to fully utilize 200MHz Dual channel RAM. This is evident with the advent of i5/i7 and i3 1156 CPU's. With the dual advantages of having an IMC and using DMI/QPI rather than a Quad Pumped FSB, RAM bandwidth at identical RAM speeds has increased dramatically. Finally, Dual Channel is worth more than 5-10% and the RAM can stretch its legs more.

    Even so, both Core 2 and Core i3/i5/i7 all have very efficient prefetching and caching, meaning that in most cases RAM bandwidth matters less than you'd think.

    Personally I'd rather have 8GH of 1600 Cas6 than 4GB of DDR 2000 Cas7/8 in some situations, as long as you can warrant needing 8GB that is.
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  8. #8
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    am i right to start a thread to cover this QX9650 oc from start to finish?

    also heres the spd pic of the mushkins


    and the Gskill

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
    current:-

    ga-ep45t extreme
    QX9650 + ek plexi waterblock
    G.skill DDR3 Pi 12800cl6 @1.6v
    Silverstone strider 1000w 80amp
    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

  9. #9
    Lsdmeasap's Avatar
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    Those are very unlikely to do 2000Mhz on P45, since they are designed for P55/X58 use with low voltage.

    You will need a stable 500 FSB to start with as mentioned above, and not all CPU's can do that easily (especially a quad), have you even got there yet? If not you need to do that first, set ram multi low and timings look and try, or use a single normal DDR3 stick to rule out the memory and then get 500 FSB working.

    Then you can try 2000Mhz with the Mushkins. Once you get 500 FSB going set 4.00D multi, and then try with MCH 1.2-1.24, tRD Set to 9 for both channels, ram voltage at 1.66, and then stock timings

    If stock timings fail, try 8-10-8-x, if that fails you are going to have to accept the fact that these were not made for this board, so you'll need to underclock them - or upgrade to 1156 as that would be a better solution all around if you can.
    Last edited by Lsdmeasap; 11-02-2010 at 02:40 PM.

  10. #10
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    Default Re: "1900mhz oc memory" and "2000mhz supported"

    And if it consistantly bsod's from ibt with error 124 with anything above 3.5gb, cpu term range tried from 1.2v to 1.5v?

    Should I just jam the qx in my sons rig to run stock and put the q9550 back in mine dial up 4ghz stable and wait until I can upgrade LOL

    4.2ghz q9550 495*8.5 stable - 22893 3dmark06
    3.3ghz q8200 475*7 stable
    current:-

    ga-ep45t extreme
    QX9650 + ek plexi waterblock
    G.skill DDR3 Pi 12800cl6 @1.6v
    Silverstone strider 1000w 80amp
    ATI sapphire 5850 + acetal/nickle waterblock ( 900/1200 )
    WD 320gb sata
    samsung 1tb sata
    Xspc plexi res + dc pump + 360 rad

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