The shrink-wrap retail version of Mac OS X Server 10.4.7 (Universal) supports Intel-based Macintosh computers that meet the system requirements (http://www.apple.com/server/macosx/specs.html). Note: You cannot install earlier versions of Mac OS X Server on Intel-based Macintosh computers.
Intel-based Mac OS X clients can connect to PowerPC-based Macs running any version of Mac OS X Server.
The Server Admin Tools for Mac OS X Server 10.4.7 can also be installed on Intel-based Macintosh computers with Mac OS X 10.4.4 or later. For more information, see this article. A PowerPC-based Mac running Mac OS X Server 10.4.4 or later can host NetBoot and Netinstall images for Intel-based Mac clients. For more information, see this article.