Strange - does Windows 98 have a memory maximum ?

jtallon

Golden Member
May 13, 2001
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Just an oddball question. I picked up an extra 256 meg of memory for my PC at home since I plan on installing Windows XP when it is available later this month. Right now I've got 512 meg, this would have moved me to 768 meg. I'm running Windows 98 right now.

When I installed that last 256 meg simm, Windows wouldn't complete booting. The BIOS recognized the memory just fine (IWILL KK266, Athlon 1.4ghz, Kingston PC-133 valueram), but Windows would stop loading just as the background bitmap loaded. If I gave it the three fingered salute, it would say that msgsrv32 was not responding.

I did all sorts of stuff, reloading all related drivers, etc., but the only thing that would 'fix' the problem was removing that third chunk of memory.

Funny thing is, I took that memory and put it in a different system, and it worked just fine. So I don't think the memory is BAD, it just wasn't working as the third simm in my system...

Anybody heard of this before ? Think I'll be able to re-install this memory when I upgrade to XP ?
 

jtallon

Golden Member
May 13, 2001
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Thanks. I searched, but must have used a bad combination of words - didn't get any matches.

Thanks again - time to pre-order XP I guess.
 

Enigma

Senior member
Oct 10, 1999
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Why can't I use more than 512MB of RAM in Windows 9x?
This is a "feature" of Windows. According to Q253912 in Microsoft's knowledge base this can be resolved by limiting the memory used by Windows by:

Type Start/Run msconfig

From the General tab, click on "Advanced"

Place a check mark in "Limit Memory To" and fill in 512MB to limit the amount of memory used by Windows

Click on OK. You will be told to reboot

or by limiting the amount of memory that Vcache uses to 512 megabytes (524,288 KB) or less by using the MaxFileCache setting in the System.ini file to reduce the maximum amount.

If you have over 1GB of memory you may need to limit the amount of memory used by Windows by modifying the MaxPhysPage paramater in Windows as describe in Microsoft KnowledgeBase article Q181862