i've tried installing 12.04 i386 on an 'older' poweredge 600 SC but as soon as I select the 'install' option from the screen provided by the install CD, the screen goes black and nothing happens. Thinking it might be the graphics card, I did a bit of reading and tried the nomodeset option to no avail.
It has a P4 processor, ATI Rage XL on-board and about a gig of ram installed. The HD currently has a few copies of XP installed and working fine.
this is the spec sheet for the server: