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Thread: OC different brands of RAM. EX38-DS4 - Is it possible?




  1. #1
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    Default OC different brands of RAM. EX38-DS4 - Is it possible?

    OC different brands of RAM. Is it possible? <HR style="COLOR: #7189a8" SIZE=1><!-- / icon and title --><!-- message -->Hi all.
    I'm trying to OC two different RAM brands. It's not exactly OC but more setting them to the lowest common frequency.
    I have OCZ 2x2GB 1150MHz 5 5 5 18
    and G.SKILL 2x2GB 1066 MHz 5 5 5 15
    There are factory specifications.

    I used to work with OCZ at 1150MHz but when I installed G.SKILL I set everything to auto in the BIOS to avoid conflicts. Now both brands work at 800MHz.

    My MB: Gigabyte EX38-DS4
    CPU: Intel E8500 @ 3.16GHz (Default).

    Can I pull the RAMs to the lowest common frequency of 1066MHz?

    Thanks.
    Gil.
    CPU: Intel E8500 @ 3.16GHz
    RAM: OCZ Titanium 2x2GB & G.Skill 2x2GB @ 800MHz
    MB: Gigabyte EX38-DS4 (BIOS F3)
    GPU: ATI Palit 4870 1GB Dual Edition
    PSU: ThermalTake 750W
    Cooling: Ximgatek Achilles 1284S
    Case: CoolerMaster 690

  2. #2
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    They may or may not work together, usually it's not easy to mix memory so normally not suggested.

    Try it out and see

  3. #3
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    Quote Originally Posted by Lsdmeasap View Post
    They may or may not work together, usually it's not easy to mix memory so normally not suggested.

    Try it out and see
    If I had 8GB of the same brand, wouldn't the MB limit me for 800MHZ? I suspect it limits once you have 8GB installed.

    Any thoughts of how I should start the oc?
    CPU: Intel E8500 @ 3.16GHz
    RAM: OCZ Titanium 2x2GB & G.Skill 2x2GB @ 800MHz
    MB: Gigabyte EX38-DS4 (BIOS F3)
    GPU: ATI Palit 4870 1GB Dual Edition
    PSU: ThermalTake 750W
    Cooling: Ximgatek Achilles 1284S
    Case: CoolerMaster 690

  4. #4
    Lsdmeasap's Avatar
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    No, but mixing up 8GB of memory might limit you to a lower freq, but not necessarily 800Mhz or anything like that.

    I'd just jump right in, do you already have them running together? If so great, set them to 1066 and see if you can get them stable, if not come down to 1000, then 950, then 900 seeing where you can get stable at

  5. #5
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    Quote Originally Posted by Lsdmeasap View Post
    No, but mixing up 8GB of memory might limit you to a lower freq, but not necessarily 800Mhz or anything like that.

    I'd just jump right in, do you already have them running together? If so great, set them to 1066 and see if you can get them stable, if not come down to 1000, then 950, then 900 seeing where you can get stable at
    I already have them running at 800Mhz and everything is set to auto. Now I've changes their freq mul. to get 1066. The timings are on auto and the CPU is up to 3.20Ghz.
    I've also raised the voltage to 2.1v. I was able to boot but then got stability issues.
    CPU: Intel E8500 @ 3.16GHz
    RAM: OCZ Titanium 2x2GB & G.Skill 2x2GB @ 800MHz
    MB: Gigabyte EX38-DS4 (BIOS F3)
    GPU: ATI Palit 4870 1GB Dual Edition
    PSU: ThermalTake 750W
    Cooling: Ximgatek Achilles 1284S
    Case: CoolerMaster 690

  6. #6
    Lsdmeasap's Avatar
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    So did you get things going smoothly yet? If not give me the full settings you are currently trying and I will advise back things you can try

  7. #7
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    Quote Originally Posted by Lsdmeasap View Post
    So did you get things going smoothly yet? If not give me the full settings you are currently trying and I will advise back things you can try
    I was able to OC the CPU to 3.80GHz but when I pulled the RAM to 1066Mhz I was able to boot to windows but got BSOD. So I guess if I was able to boot then I might be on the right track. Here are my BIOS settings:

    Gigabyte GA-EX38-DS4 BIOS
    CPU Clock Ratio : 9X
    Fine CPU Clock Ratio : 0.5
    CPU Frequency : 3.80GHz(400X9.5)
    CPU Host Clock Control : Enabled
    CPU Host Frequency : 400
    PCI EXP. Frequency : 100
    C.I.A.2 : Disabled
    Performance Enhance : Standard
    System Memory Multiplyer (SPD) : [2.66D] (2.00D)<-current
    Memory Frequency : [1066] (800)<-Current
    DRAM Timing Selectable (SPD) : Manual
    CAS : 5
    DRAM RAS to CAS : 5
    DRAM RAS Precharge : 5
    Precharge delay (tRAS) : 18 (24)<-Current
    Advanced Timing Control
    ACT to ACT Delay (tRRD) : 3 [Auto]
    Rank Write to Read Delay : 3 [Auto]
    Write to Precharge Delay : 6 [Auto]
    Refresh to ACT Delay : 54 [Auto]
    Read to Precharge Delay : 3 [Auto]
    Static tRead Value : 7 [Auto]
    Static tRead Phase Adjust : 0 [Auto]
    Command Rate (CMD) : 2 [Auto]
    Clock Driving & Skew Control
    CPU/PCIEX Clock Driving Control : 800mV
    CPU Clock Skew Control : Normal
    (G)MCH Clock Skew Control : Normal
    System Voltage Control : Normal
    DDR2 OverVoltage Control : [+0.30V] (0V)<-Current (1.8v)
    PCI-E OverVoltage Control : Normal
    FSB OverVoltage Control : Normal
    (G)MCH OverVoltage Control : Normal
    Loadline Calibration : Auto
    CPU Voltage Control : [1.32500v]
    Normal CPU Vcore : [1.22500v]

    Please note that it doesn't recognize the correct PC2 number. it states 6400 for OCZ and G.Skill, however OCZ is 9200 and G.Skill is 8500.

    CPU-Z Validator:


    RAM Slot1:


    RAM Slot2:
    Last edited by Gil80; 06-22-2010 at 04:12 AM.
    CPU: Intel E8500 @ 3.16GHz
    RAM: OCZ Titanium 2x2GB & G.Skill 2x2GB @ 800MHz
    MB: Gigabyte EX38-DS4 (BIOS F3)
    GPU: ATI Palit 4870 1GB Dual Edition
    PSU: ThermalTake 750W
    Cooling: Ximgatek Achilles 1284S
    Case: CoolerMaster 690

  8. #8
    Lsdmeasap's Avatar
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    All 1066+ ram is really 800Mhz memory anyway, so what you mentioned is normal.

    Try these settings for 1066, if you can get them going you will have to try lower like 900-1000 and see how that goes.

    CPU Clock Ratio : 9X
    Fine CPU Clock Ratio : 0.5
    CPU Frequency : 3.80GHz(401X9.5)
    CPU Host Clock Control : Enabled
    CPU Host Frequency : 401
    PCI EXP. Frequency : 100
    C.I.A.2 : Disabled

    Performance Enhance : Standard
    System Memory Multiplyer (SPD) : [2.66D]
    Memory Frequency : [1066]
    DRAM Timing Selectable (SPD) : Manual

    CAS : 5/6
    DRAM RAS to CAS : 5/6
    DRAM RAS Precharge : 5
    Precharge delay (tRAS) : 18 (24)<-Current

    Advanced Timing Control
    ACT to ACT Delay (tRRD) : 5
    Rank Write to Read Delay : 8
    Write to Precharge Delay : 12
    Refresh to ACT Delay : 54 [Auto] << Here may be a main part of your issues, for 8GB you need at least 64-74 or so
    Read to Precharge Delay : 4-5
    Static tRead Value : 9 for now
    Static tRead Phase Adjust : 0 [Auto]
    Command Rate (CMD) : 2 [Auto] <<Set 2

    Clock Driving & Skew Control
    CPU/PCIEX Clock Driving Control : 800mV
    CPU Clock Skew Control : Normal
    (G)MCH Clock Skew Control : Normal

    System Voltage Control : Normal
    DDR2 OverVoltage Control : [+0.30V] (0V)<-Current (1.8v) << Set highest spec of either set, so 2.1 or 2.2 if needed
    PCI-E OverVoltage Control : Normal
    FSB OverVoltage Control : Normal << Set +0.1
    (G)MCH OverVoltage Control : Normal << Also a big issue, for 4GB you need more so 8GB is a definite. Set +0.2-0.3
    Loadline Calibration : Auto
    CPU Voltage Control : [1.32500v]
    Normal CPU Vcore : [1.22500v]

  9. #9
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    I have half good news :)
    I wasn't able to boot to windows with these settings but I then increased the MCH voltage to 0.3 from 0.2 and I then was able to boot but I noticed that apps took a while to load and then I used Prim95 and I got hardware failure right on the first set of tests.

    I've reverted back to these settings:

    Gigabyte GA-EX38-DS4 BIOS
    CPU Clock Ratio : 9X
    Fine CPU Clock Ratio : 0.5
    CPU Frequency : 3.80GHz(400X9.5)
    CPU Host Clock Control : Enabled
    CPU Host Frequency : 400
    PCI EXP. Frequency : 100
    C.I.A.2 : Disabled
    Performance Enhance : Standard
    System Memory Multiplyer (SPD) : [2.00D]
    Memory Frequency : [800]
    DRAM Timing Selectable (SPD) : Manual
    CAS : 5
    DRAM RAS to CAS : 5
    DRAM RAS Precharge : 5
    Precharge delay (tRAS) : 24
    Advanced Timing Control
    ACT to ACT Delay (tRRD) : 3 [Auto]
    Rank Write to Read Delay : 3 [Auto]
    Write to Precharge Delay : 6 [Auto]
    Refresh to ACT Delay : 54 [Auto]
    Read to Precharge Delay : 3 [Auto]
    Static tRead Value : 9 [Auto]
    Static tRead Phase Adjust : 0 [Auto]
    Command Rate (CMD) : 2 [Auto]
    Clock Driving & Skew Control
    CPU/PCIEX Clock Driving Control : 800mV
    CPU Clock Skew Control : Normal
    (G)MCH Clock Skew Control : Normal
    System Voltage Control : Normal
    DDR2 OverVoltage Control : [Normal]
    PCI-E OverVoltage Control : Normal
    FSB OverVoltage Control : Normal
    (G)MCH OverVoltage Control : Normal
    Loadline Calibration : Auto
    CPU Voltage Control : [1.30000v]
    Normal CPU Vcore : [1.22500v]


    I would like to continue with this project so only if you don't mind, I would be glad for your assistance.

    Thank you :)

    Gil
    CPU: Intel E8500 @ 3.16GHz
    RAM: OCZ Titanium 2x2GB & G.Skill 2x2GB @ 800MHz
    MB: Gigabyte EX38-DS4 (BIOS F3)
    GPU: ATI Palit 4870 1GB Dual Edition
    PSU: ThermalTake 750W
    Cooling: Ximgatek Achilles 1284S
    Case: CoolerMaster 690

  10. #10
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
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    Default Re: OC different brands of RAM. EX38-DS4 - Is it possible?

    MCH Voltage is always going to need +2 at least, most likely +0.3 for 8GB.

    See if you can boot using the 2.40B multi

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