Rocks 2.3.2 x86 is based on Red Hat 7.3. Rocks 2.3.2 IA64 is based on Red Hat Advanced Workstation 2.1 recompiled from Red Hat's publicly available source RPMs. All Rocks / Cluster software is identical between both platforms.

2.3.2 (Annapurna) NPACI Rocks Cluster Distribution: Users Guide...