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Hey, I have an old HP Pro 3090 MT CPU. I had some components from another CPU lying around and wanted to use it on this one. The Motherboard is MS 7647 Rev 1.0 which already has 1 GB x 2 ram DDR3 1333 Mhz. I tried using 1600 MHz cards of 4gb DDR3, but it didn't work. Also I found no information about this Motherboard online. So I needed some help.

Posted by Prathik Mallya on

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  • Anonymous Sep 20, 2020

    Does CPU mean computer in your country?
    not here in USA it means the main processor.
    that MS7647 is a HP contracted to MSI motherboard, and was not sold by MSI ever.!
    MSI will tell you that if you asked .

    it is private to HP, and secret that contract. and made in year 2010. (old)
    core 2 relics are junk now go i3 up !

    Did you ask this?
    why not. (they need a laugh? )
    10,000 hits

    DDR3 can be fun or not. toss coin
    vast persons know that and landed in DDR3 H3LL. (due to EVOLUTION alone)

    upgrades are rare on this OLD PC.

    seen here just 8 (sad no?)
    only 1 users world wide with 8GB here.

    THIs PC has no QVL no , qualified vendors list for DDR3. zero, nada
    that means google it or do it your self to learn what any OLD PC can do now.

    i bet 4 slots of 4GB will not work.
    and if did , is useless with 32bit OS.

    dells only max sized DDR3 sold by dell then was (each)
    2GB, 1333MHz, PC3-10600, CL9 128M x 8, DDR3-1333 Dual In-Line Memory Module (DIMM)

    The mobo and BIOS must like it or fails.
    all web sites on this topic say that for sure upgrade sites all. for good reasons.

    This is why qualified memory stick makers, exist and sell their products, known to work in a specific PC.

    The only hope is , BIOS upgrades that can do more DDR3 than it did in 2010
    or buy qualified DDR3 from say Corsair.
    or ask direct.
    I have no HP secrets here, few do.
    As them. ask the maker for help. really./

  • Anonymous Sep 20, 2020

    the real question asked correctly is:

    I have HP PRO 3090 desktop computer, 2010
    I want to upgrade DDR3 ram.
    I have found used but very newer and unstated makers model and p/n DDR3 from some other unstated PC. (we need ddr3 SKU sicker facts)
    why does it fail.?
    Answer , ask Not MSI ever on this.
    Answer , upgrade BIOS so it might work.
    Answer, buy qualified DDR3 from Corsair or Kingston dot com.
    and cross you fingers. nobody does this.
    the PC is TOO OLD now CORE2 junk.

    most these PCs will not run, windows 10 64bit so any ram over 3.5GB is useless.!!!!
    You are not asking for faster ram but unstated and the MMC can not do faster
    and so I can assume you want 8GB more ram,
    I ask you why>? (NO OS Told)
    why upgrade RAM,? using any CORE 2.

    some rare Core2quads run 64b but I bet you dont have that. Q9400? newest stepping only works.
    no target OS stated,. so all I can do is wonder what's up DOC.


    Intel Core 2 Quad processor Q9550 - 2.83GHz (Yorkfield, 12MB (2x6MB) shared Level-2 cache, 1333MHz front side bus speed, Socket 775) SLB8V (step E0 version) a must. for w10.

    AND if using newest stepping I have seen it run w10-64bit. (other chips fail but does run )
    the CPU limits are here.
    best stated.

    Tell why you need 8GB bank in any CORE2 PCs.
    Core2 is the CPU, the central processor.
    would love to hear goals not just DDR3 dreams.
    CORE2 is Banta Fodder. and is dark side.

  • Anonymous Sep 30, 2020

    wrong ram.
    end story.
    DDR3 is not the same for 10 long years.
    oldest to new. not the same data sheet told you not to do that but you did and it failed.

  • Anonymous Oct 01, 2020

    simple answer,
    wrong ram dude.
    buy certified ram for
    but I bet you will not.$$$$$$$$$



2 Answers

Carl Rock

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The faster memory could work but not necessarily. There are a lot of variables. A 10% speed difference might work but at 20% it's difficult to meet design requirements.

Are you removing the 1333s and using only the1666 components? Does it boot and give you bios screen splash or does it beep and lock up?

Try using only the 1666mhz and see what happens. If it boots with the 1333s only, but not the 1666s only, then likely the speed difference is too great.

Posted on Sep 19, 2020

  • Anonymous Sep 20, 2020

    Carl the BIOS does all that,
    the old 10 year old BIOS reads the DDR3 SPD chips and if it can not understand any thing there it can not set the speeds right at all
    or the DDR3 has too dense of DRAM on the sticks.
    100% BIOS reasons to fail are first.
    yes beeps. and dead PC.
    he failed to test one stick of DDR3 4GB.
    Intel said in all data sheets DO NO MIX RAM by SKU, or brands or sizes per BANK .
    It will run (if BIOS wants to) at he slow stick speed (limit)
    and will not run at full speed at all this MMC can not run that at all.



Jerickson Jaspe

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I suggest you bring it to the repair shop so you can know the exact problem. But the above answer is correct as well

Posted on Sep 12, 2020

  • Larry Ng
    Larry Ng Sep 14, 2020

    DDR3 memory is problematic.
    for 2 reason the many years it was used.
    and old PCs do not like newer DDR3 with higher densities.
    you would learn that doing lots of DDR3 upgrades.
    Old PCs like your CORE2 is very dumbb(sic)
    then, the intel CORE2, MMC logic made long long ago does not like modern DDR3 memory made now. (or this new)
    to make that old mobo work right you need DDR3 what works on it.
    Best is old DDR3 bought and used.
    or buy CERTIFIED DDR3 from the top makers.
    here is one

    btw you PC maker does not support this old PC now. for qualified new DDR3.

    try this, certified class memory. they work on your PC.

    Some PCs can be BIOS upgrade to allow newer DDR3 to run. did you do that first?

    stop searching mobo specs.
    and learn to read only about the 3090
    Ok< that HP PC is sold with 50 motherboard world wide, (hp parts surfer dot com)

    the PC spec is here if you like read that.

    there is no answer for all 25 motherboards sold for this PC.(HP sales)
    all you can do is:
    1: use certified DDR3.
    2: upgrade the BIOS,
    3: and try all you want. other DDR3.

    the spec is here.
    HP does not document BIOS fully nor effectively for sure DDR3 QVL lists. none.

    ddr3 was and is made for 13 long years
    newer or new DDR3 will not work in vast old PCs now. due to wrong density now.
    that is a fact of life. DDR3.



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