Welcome to the SGI Altix Museum page! SGI Altix 450 / 4000 series (Single IRU): 8x 1.6GHz Itanium2 Dual Core Processors for a total of 16 Cores, over 1MB of L2, 18MB of L3 Cache, 533 Frontside Bus. Codename "Montecito" .. 1.7 BILLION transistors per die! (IA-64 Arch) 8GB of DDR2 RAM per Node board, so 32GB total min per IRU with room for lots more NUMA-Link Interconnect that allows