Dell Optiplex GX620 RAM Upgrade PC4200/PC6400

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Dell Optiplex GX620 RAM Upgrade PC4200/PC6400

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Hi,

I recently bought a cheap GX620 on ebay for my daughters first PC and it currently only has 1GB RAM.

After a quick look on ebay I came across some very cheap 1GB sticks at 5GBP each.....

Hyperam DBV1GBUD2641288 1GB PC6400 DDR2

Are these compatible with this machine as I read somewhere that generic RAM isnt compatible with some brands of computer??! seems a bit odd to me as RAM is RAM or so I thought. Also if it is compatible can I run 2 sticks of this RAM alongside the 2x512mb sticks of PC4200 that are already installed?

Any advice would be gratefully received

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All Replies
  • PC4200 is TOO SLOW for a GX620.  

    The ram must NOT BE ECC and Must Be Low Density INTEL Chipset Compatable Ram.

    8 Gigs is Max with 64 bit CPU and OS.

    Recommended Upgrade

    part image

    Standard name

     

    Memory clock

    (MHz)

    Cycle time

    (ns)

    I/O bus clock

    (MHz)

    Data rate

    (MT/s)

    Module name

     

    Peak transfer rate

    (MB/s)

    (CL-tRCD-tRP)


    (ns)

    DDR2-400B
    DDR2-400C
    100 10 200 400 PC2-3200 3200 3-3-3
    4-4-4
    15  
    20  
    DDR2-533B
    DDR2-533C
    133⅓ 266⅔ 533⅓ PC2-4200 4266⅔ 3-3-3
    4-4-4
    11¼
    15  
    DDR2-667C
    DDR2-667D
    166⅔ 6 333⅓ 666⅔ PC2-5300 5333⅓ 4-4-4
    5-5-5
    12  
    15  
    DDR2-800C
    DDR2-800D
    DDR2-800E
    200 5 400 800 PC2-6400 6400 4-4-4
    5-5-5
    6-6-6
    10  
    12½
    15  
    DDR2-1066E
    DDR2-1066F
    266⅔ 533⅓ 1066⅔ PC2-8500 8533⅓ 6-6-6
    7-7-7
    11¼
    13⅛

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  • I took the plunge and bought these sticks of RAM on the off chance they would work. Amazingly they did actually work a treat so this RAM was cheap as chips at 5GBP each :) The computer now runs a treat with 3GB of RAM. Plenty for anything my daughter needs to do with this machine.

  • PC2 6400 ram is fine.    PC2 4200 is not.  Glad to hear it worked out.

    Report Unresolved Customer Service Issues here
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  • Actually SpeedStep its now running 2 x 512mb sticks of pc4200 alongside the 2 x 1gb sticks of pc6400 with no problems thus far. Thanks for your reply though.

  • sir/madam
    we are in deep trouble because we have a Dell CPU model : OPTIPLEX
    GX620 which is not working since 6 months (Not booting) ...
    serial number: <ADMIN NOTE: Serial number removed per privacy policy>
    eleven digit service number : <ADMIN NOTE: Service number removed per privacy policy>


    we tried to get it service done but we failed because every time we
    call the service number they keep transferring the call to other
    person...

    our system is not in warranty so we will pay for service..

    please help us by providing us a service engineer ,so that we can
    perform our research and diagnostic work....

    research is very urgent

    Regards
    Dr Maikal kujur, doctor ( mobile number <ADMIN NOTE: mobile number removed per privacy policy>

    <ADMIN NOTE: Address removed per privacy policy>

  • maikal

    This is a user to user forum so we cannot help you out. I have reached out to some  contact to see if we can get you some help

     HomeBuilt SandyBridge P8P67 i7 2600k @ 4.5 ghz 8gigs GSkill Ripjaws. Corsair 800D Case and AX1200 Ps X-Fi Titanium Fatal1ty pro PCIe Sound Card
    Dell Studio XPS 1645  Window 7 Pro

    Forum member since 2003

  • @maikal - Read this thread and then inspect the motherboard on your GX620 for damaged capacitors. If you find any, the motherboard will have to be replaced...

     

     

    If this answers your question, please click  Yes  

    Ron

    Forum Member since 2004

    I am NOT a Dell employee

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    Dell Support Hotline

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     Solve your technical issue via email
    Explain your problem to the technician.
    Be prepared to provide the technician with the following information:
    - Your system's Service Tag Number

    - The names and versions of installed operating systems; the operating

    system that was running when the problem occurred

    - Peripherals being used
    - Any error messages and/or beep codes received and when they occurred
    - What you were doing when the problem occurred.
    - What steps you have taken to resolve the problem, including the results from the diagnostic tests
    Cooperate with the technician to resolve the problem.

    Cooperation is critical to a successful resolution.

    Listen carefully and follow the technician's suggestions.

    Tell the technician exactly what happens when you perform the suggested task.

    Report Unresolved Customer Service Issues here
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  • PC6400 is more than fast enough (I don't think the chipset will run faster than PC5300 speeds.

    Ideally, you want to install memory in matched pairs, so I would suggest you buy 4x the 1 GBP RAM sticks and not use the PC4200 stick currently in the system (the PC6400 RAM will be throttled back to that slower speed if you were to add one or three faster pieces to the system... You may not care, but at such a low price I'd try for that little performance edge with faster memory.)

    As an option, many are reporting these systems can support up to 8 gigs of RAM, though not formally supported by Dell, so if you find a good deal on 2 Gig DDR2 RAM that may be an option (but 4 Gigs for 20 GBP is most likely sufficient).

  • SpeedStep,

    I bought 2- 2GB sticks of DDR2 PC-6400 non-ECC to upgrade my GX620 Ultra Compact (only 2 memory slots) running Windows 7 Ultimate 64bit. Was terribly slow with only 1GB installed.

    After installing the 4GB RAM, it wouldn't boot up. Tried removing one stick...still didn't work.

    Any idea what is my problem???

    Thx

  • Update the bios to A11.  3.5 Gigs is max regardless of how much is installed.

    Ram MUST BE LOW Density INTEL compatable Ram.  2 Gig Dimms do not usually work at all or Post until the bios is updated. 

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  • The RAM sticks I bought are labelled 2GB PC-6300/6400 DDR2 800Mhz 2048MB Non ECC.

    They are Komputer Bay matched sticks.

    How do I know if they are low density Intel compatible?

    You said 2GB Dimms don't usually work at all.

    What specific type memory upgrade do you recommend that can give me max of 3.5GB for my 2 slots?  Thx.

  • BIOS UPDATE REQUIRED for 2 Gig Dimms

    http://www.crucial.com/upgrade/Dell-memory/OptiPlex/OptiPlex+GX620+Series+%28Desktop,+Mini-Tower,+and+Small+Form+Factor%29-upgrades.html

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  • Thank-you SpeedStep!

    I was going to update the Bios to A11 as recommended but I've read that some users have had boot problems after updating to Bios. I have the original 1GB RAM installed (2-512 sticks).

    Should I be able to update to A11 successfully or will having Windows 7 Ultimate 64bit going to give me a problem?

  • I discovered my computer (bought used) had already been upgraded to latest BIOS A11.

    So with A11 update I should be able to install upgrade to 4GB RAM (2-2GB).  I will return the KomputerBay RAM and try the Crucial memory and hope that it works OK.

    BF