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Thread: RAM upgrade for wl-500gx

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  1. #1

    RAM upgrade for wl-500gx

    I want to try to add more memory for my wl-500gx by de-soldering original K4S281632F-TC75(8Mx16) SDRAM chips and adding K4S561632E-TC75 (16Mx16). Such action will (theoretically) give me 64MB of RAM, allowing me to run more programs. Anybody had such experience with this router?

  2. #2
    Join Date
    Aug 2004
    Seems not.

    This may invoke an extra needed adress line which is maybe unavaliable on the board, and sure a rework of the bootloader. Good luck afterall, it shouldn´t be impossible .

    My Stuff: WL-500g, Mapower H31x 10GB HD, Philips Webcam Vesta PRO, TerraTec Webcam PRO, USB Hub

  3. #3
    Have you (or anyone else) done this yet? If not, do you know if the A12 line is in fact routed to the processor? Seems easy enough to replace the chips but adding the A12 line might be a bit tricky I think...

    Thanks in advance

  4. #4
    Hi again!

    I checked the schematic and layout and the needed address line is present, with a series resistor to each memory chip. So by simply soldering two 0OHM jumpers (or put a solderblob..) and you have the needed hardware to support 64MB memory...

    ..actually using the memory is something else, can this perhaps be as easy as in the 16MB->32MB with nvram settings? any thoughts?


  5. #5
    Join Date
    Apr 2004
    Interesting topic. Not that I can add anything useful here, but still....

  6. #6

    any update ?

    any update about memory upgrade in deluxe ?


  7. #7

    I have some(partially) good news. I have replaced the memory chips and the router boots up and reports the 64MBs of memory.

    now to the partial part

    Router is very unstable and reboots if trying to ftp large files etc..

    I do belive this is caused by bad solder joints and will go through them again, I did the soldering in a hurry last friday while getting ready for a party. Needless to say the router did not boot up after that, no power led and working as a switch no output on the serial console. After fixing a few shorst today the router booted up and reported all the memory, but I suspect that a few pins might have intermittent faults leading to the unstable behaviour so I will redo the soldering then time permits.


    This has a high potential to work, but take your time replacing the chips and don't forget R68&R69...

    will get back with an update and pictures then I have had time to redo the sloppy soldering.

  8. #8
    Join Date
    Jun 2007

    WL-500gp problem with RAM upgrade to 128 MB

    Hi Guys,
    Now I'm using competitive firmware DD-WRT,
    but I tried to upgrade WL-500gp to 128MB RAM according to post

    I need more RAM to run asterisk. Now I'm using Torrent client and FTP server with USB disk.

    Unfortunately upgrade failed. Slowly I'm induce to Oleg's firmware, but decision like this required time to configure router once again and familiarize with new firmware.
    I'm not a linux specialist, so this is not easy for me.

    This is quote from DD-WRT forum, but nobody can help me. Maybe somebody of you give me answer.

    [QUOTE]I'm tried failed RAM upgrade (to 128 MB) on the WL-500gp. It was done by follow post from Oleg's forum:
    [URL=" (is written in russian language, but I know it a little). Before replacing memory chip from 2x HY5DU281622ETP-5 to 2x HY5DU121622CTP-J, (which should give me 128 MB) I sets NVRAM settings (only 16 MB):

    nvram set sdram_init=0x000b
    nvram set sdram_config=0x0032
    nvram set sdram_ncdl=0
    nvram commit

    Desoldering and resoldering was not so easy (I haven't experience with hot air station).
    Finally router doesn't want boot correctly. Power led came on, but router don't respond on ping. So I replace memory chips once again for new one (maybe damaged ? over temperature ?), without new result, and again new chip and again the same. It was possible to put router in firmware restoration state (by pressing together restoration switch with power on), power led start flashing, but putting firware was not possible.

    My questions is:
    DD-WRT can support 128 MB RAM ?
    How works memory detectiom at startup ? Only by NVRAM settings ? CFE ?
    Generally what was wrong ?

    I came back to old one memory chips, work fine.
    sorry for my english[/QUOTE]

    Which setting I have to set before upgrade ?
    Problem was with firmware or not ?

    regards Gidus

  9. #9
    Join Date
    Jun 2007
    So, I understand my mistake. Problem probably was with NVRAM settings.
    Module HY5DU121622CTP-J is a DDR333, works only with CL2 or CL2.5

    I try to understand rules for set correct nvram variable settings sdram_config,sdram_init
    but could you help me and suggest correct one for
    HY5DU121622CTP-J ?

    regards Gidus

  10. #10
    Have anyone did it success , Pls tell the step in eng.

    Thank you very much..

  11. #11

    wl500gp 128Mb ram updgrade

    Can anyone translate this thread or provide step by step guide?
    Would it be nice to have 128Mb of ram for wl500gp

  12. #12
    Join Date
    Mar 2007
    Budapest / Hungary
    use babelfish it to translate


  13. #13
    Quote Originally Posted by KGy View Post
    use babelfish it to translate

    Yes I have already tried babelfish and google translate but I'm afraid I'm missing something.

  14. #14
    Is it necessary to change any more (in hardware or software) to put 128MB in addition to soldering the chips?

  15. #15
    Join Date
    Jun 2005
    From my experience, there is nothing to do except carefully resolder chips. Boot loader detects memory change itself.

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