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Bad to mix Ram of different Manufaturers

By Aximilator
Jan 20, 2010
  1. Hey i have 2 different ram cards both are 512 mb and have not had any problems but have read in lots of places it is bad to mix them. Because they are different manufacturers does it matter?
     
  2. Aximilator

    Aximilator TS Rookie Topic Starter Posts: 86

    Oops i forgot to add the names and such, here they are:


    DIMM1: Hyundai HYMD564 646CP8JD43
    DIMM2: Samsung M3 68L6423FTN-CCC

    Field Value
    Memory Module Properties
    Module Name Hyundai HYMD564 646CP8JD43
    Serial Number 04FF4095h
    Module Size 512 MB (1 rank, 4 banks)
    Module Type Unbuffered
    Memory Type DDR SDRAM
    Memory Speed PC3200 (200 MHz)
    Module Width 64 bit
    Module Voltage SSTL 2.5
    Error Detection Method None
    Refresh Rate Reduced (7.8 us), Self-Refresh

    Memory Timings
    @ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
    @ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)
    @ 133 MHz 2.0-2-2-6 (CL-RCD-RP-RAS)

    Memory Module Manufacturer
    Company Name Hynix Semiconductor Inc.

    and

    Field Value
    Memory Module Properties
    Module Name Samsung M3 68L6423FTN-CCC
    Serial Number F20185BAh
    Module Size 512 MB (2 ranks, 4 banks)
    Module Type Unbuffered
    Memory Type DDR SDRAM
    Memory Speed PC3200 (200 MHz)
    Module Width 64 bit
    Module Voltage SSTL 2.5
    Error Detection Method None
    Refresh Rate Reduced (7.8 us), Self-Refresh

    Memory Timings
    @ 200 MHz 3.0-3-3-8 (CL-RCD-RP-RAS)
    @ 166 MHz 2.5-3-3-7 (CL-RCD-RP-RAS)

    Memory Module Manufacturer
    Company Name Samsung
     
  3. Aximilator

    Aximilator TS Rookie Topic Starter Posts: 86

    I think that bout sums it all up if there is any more info you would like please let me know. i gave you everything i could find on them because i am trying to be as descriptive for you guys as possible to give as much info.
    Thanks
     
  4. ACE99

    ACE99 TS Rookie Posts: 70

    I don't think mixing rams is bad but it can cause some problems if they don't completely match in specs.
     
  5. dividebyzero

    dividebyzero trainee n00b Posts: 4,943   +728

    Generally not a good idea to mix RAM vendors. But sometimes necessity if the mother of invention. As some older systems pass into obsolescence then finding matched or vendor approved RAM might proof either very expensive or impossible. Having at least one known stick that works would allow you to try out other brands. The simple equation being that if they are stable together then the vendor ID and chip maker is not an issue.
    I would download Memtest86 and run it to be (close to) 100% sure -if it passes then you can rest easy. A quick cut and paste from one of my earlier threads....
    -Download Memtest86+ here http://www.memtest.org/ then burn the .iso (after uncompressing) to CD with ImgBurn or burning software (needs to be bootable) OR download the executable for USB if your BIOS allows you to boot the system from USB
    -If you have the RAM set at non-stock levels it would pay to set your BIOS to default settings.
    -Power off. Remove your 3 known working RAM sticks and insert the new stick into DIMM 0 (the first DIMM slot)
    -Reboot computer, change boot order to CD (or USB), save change, reboot.
    -Memtest will load and test the module. Each pass takes around 10-15min to complete for 1Gb, run 7-10 passes minimum. Tests 2 and 5 within the pass are most likely to find errors and you can order loops of these tests in the options. If the RAM passes, stop the test and power off. If the RAM fails then stop the test and skip the next step
    -Move the RAM stick to the 4th DIMM, reboot and repeat the test sequence.
    -Stop the test when you're happy that the RAM is stable, power off.
    -Insert your stable RAM back into it's slots
    -Remove CD/USB, reset boot order, save changes, reboot.
     
  6. strategic

    strategic TechSpot Paladin Posts: 1,274

    For the most part, mixing RAM is ok. The computer I am on right now has 2 different sticks (mfr only).
    I've been doing for over 15-20 years (even when RAM was expensive) and never had a problem.
    If you have different speeds, your faster ram is only going to be as fast as the slower stick next to it.
     
  7. Aximilator

    Aximilator TS Rookie Topic Starter Posts: 86

    okay thx i will dload that an try it out. i will let yall know.
     
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