From: "Tom Waddell"
>Looking for 1GB PC2100 DDR RAM that is NOT ECC REG. About all I find on eBay is the ECC REG type. I think >ECC is error checking 
>memory. As far as I know, ECC works but just takes a little longer to boot up.

Memory can be hard to match.
You did not say if Desktop (184pins), or Laptop (200pins)

Look on this page: (Desktop.)
http://www.crucial.com/store/partspecs.aspx?IMODULE=CT12864Z335

Look at the FAQs. Backward-compatible info is there.
Make sure for yourself if this matches your specs. Based on incomplete info
this may or may not be the right one.

The best was to find RAM is through the Memory Advisor tool on most
RAM WEB sites.   One is here:  (No connection to them except as customer.)
http://www.crucial.com/            Rick Glazier

              The NOSPIN Group is now offering Free PC Tech
                     support at our newest website:
                          http://freepctech.com