Hi, I'm upgrading the RAM in the church's computer. Currently, it contains 256 MBs of DDR PC2100. The board will support up to 512MBs so I'm looking for an additional 256MBs. When I looked around on Newegg, ZipZoomFly, etc., I found DDR RAM, but no PC2100. I've found DDR PC3200. Is this the same RAM with just a different speed? Question is, will it work with the machine? Thanks in advance for all your help - it's greatly appreciated.