There is no definative list as such + it also depends on the operating system.
Check the most recently available in the file downloads library for your system.
As a rough guide:
x100, x200 series poweredge servers stop at HIP 3.52 (NT 4 and windows 2000)
x300 series stop at server administrator 1.33 for NT 4(agent 4.8) and Server Administartor 1.4 for Windows 200x (agent 4.9)
x400, x500, x600 series are currently at server administrator 1.5 (agent 4.100 - displayed as 4.10)
Server administrator and dell agents are available for Netware and Linux as well