Our forums are currently in maintenance mode and the ability to post is disabled. We will be back up and running as soon as possible. Thanks for your patience!

General discussion


RAM up -- What?

By walksontop ·
Win 98se is used at our offices on a 13 station peer to peer network. We use autocad LT2002. We have been labouring under the impression that the more ram the better. We live with the blue screen of Death and lost data. Is more RAM better? If not, Why? Please explain. We use HP Kayak XA's W/ 400mhz to 550mhz intel pentII processors.

This conversation is currently closed to new comments.

Thread display: Collapse - | Expand +

All Comments

Collapse -

by OTL In reply to RAM up -- What?

Win 98 does not recognize over 512 Meg of ram, hence over 512 Meg may be in the PC but not "available" per the operating system. Win ME fixed most of the RAM size problems thus upgrading to XP would allow multiple SDRAM over 512 Meg to be fully available to the user. Autocad is a memory "HOG", intense / detailed drawings will suck up most available ram just to display it.

Collapse -

by jschein In reply to RAM up -- What?

Autocad LT 2002:
System requirements
Pentium II or AMD K6II 450 MHz or faster processor
Microsoft Windows 98, NT 4.0 SP5 or later, 2000, or ME
128 MB RAM
200 MB hard disk space
CD-ROM drive
VGA 1024 x 768 or better display
Mouse or other pointing device

Mind you this is the BARE minimum for this app to run. For optimum performance on this and any other app, always double (if you cannot triple the machine specs) to get the fastest reliable settings.

Autocad, Autocad LT, etc... Any of these 3d modeling programs suck every resource available just to show you a circle, let alone a full blown 3d drawing. If you are running win98 in a corporate environment, I would suggest to your highers, upgrade to win2k along with a new system. Systems as such from dell to small to large corporations run from 500 - 1000 usd. Very cheap when you are talking about CAD drawings.

More ram is better, but as stated Win98 has memory buffer errors and will not utilize all the memory if above 512mb or ram. When you get the BSOD, if it happens when you print, update your printer drivers, if it comes up as the file ati???.sys or some video file, update your video card drivers. Also, if this is happening more frequently, it would be best to save data externally, then wipe those machines out and start a clean install of 98 if your company does not have the resources to update those systems. Do not use "system restore" cd's as they put erroneous information, files, links and so forth back on the system. Install 98 clean, install motherboard drivers and all other drivers. Also, copy the 98 cabs to a folder on c or d drive called 98setup... that way when you plug a new mouse in or change something, your system has those cabs locally and no cd is required to change system files.

Good luck

Collapse -

by TheChas In reply to RAM up -- What?

There is a known bug in the W9X code that can cause a number of problems with more than 511MB of RAM.

This bug is VERY configuration dependant. Some systems run fine with 1GB or more RAM.

Benchmark tests have shown optimum scores for W98 with 196MB of RAM.

That said, here is what I would do:
Take 1 system aside as a test bed.

Install 384MB of RAM.
Wipe the hard drive, and re-install Windows and autocad.
When you install updates, STOP at IE 5.5 SP2 and the version of DirectX supported by the driver for the video card.

Put this box through as hard a test as you can.
If it runs a lot more stable (it should) perform the same on your other systems.

Another 'feature' of the W9X OS is that the registry grows every time you boot up.
After a while, the registry gets too large for the OS to run properly. As a result, you get crashes and blue screens.
2 to 3 years is about the longest you can expect a W9X box to operate reliably before needing to reinstall Windows.


Collapse -

by wlbowers In reply to RAM up -- What?

Your problem is the dumb operating system.

Windows Vcache determines the maximum cache size based on the amount of RAM that is present when Windows starts.

Vcache presets the memory addresses that it will be able to use.

The problem is that memory over 511meg allows Vcache to set memory addresses that are used by the system files. So the Vcache writes in to memory that is running the computer.

So in effect the system eats itself. So if you lock up the computer and crash it enough times, well it's reload time.

You can utilize the 512meg by setting a maximum vcache size in the system.ini file.

Edit the system.ini file and scroll to the

add the following line


The above sets a working Vcache max of 300meg. Remember a meg of ram is actually 1024.

This problem affects computers running 95 through ME.

Microsoft Knowledge Base article Q253**2


Related Discussions

Related Forums