IBM eServer p5 520 / 520Q

There are tower and rackmount (4U) versions of this machine.
Certified for SUSE Linux Enterprise Server 9 and Red Hat Enterprise Linux AS 3.

Technical Specifications

Linux compatibility	delivered standard or optional with Linux
Series	eServer p5
System type
Architecture	PowerPC (CHRP)
CPU	max. 2 POWER5+, 1500/1650/1900/2100 MHz
System bus	PCI-X
Peripheral bus	Ultra-320 SCSI
Years of production	2004 -

Links

IBM

• OpenPower Project - Gives non-root access to IBM POWER5 based servers and intends to be a forum for the users of PPC based servers. As the site tells frankly: " The OpenPower Project is an initiative of IBM".
• Service and productivity tools for Linux on POWER systems - IBM pages on PPC based servers.

PowerPC

• BlueCat Linux: PowerPC
• Debian GNU/Linux: PowerPC
• Gentoo Linux: PowerPC
• Linux - Wegweiser zur Installation & Konfiguration: Linux auf PowerPC-Computern installieren
• Linux on Power wiki
• MkLinux
• penguinppc.org - Official homepage of the Linux PowerPC port.
• penguinppc64.org - Linux on 64 bit PowerPCs.
• PPCNUX - German website around PowerPC (especially Mac) Linux