The xSeries 455 servers, powered by XA-64 Enterprise X-Architecture and 64-bit Itanium 2 processors, bring the future of 64-bit processing and production-level reliability to your datacenters. Featuring mainframe-inspired, advanced mission-critical function, these dependable 16-way SMP-capable enterprise servers help run your complex business applications around the clock.These servers are equipped with one or two powerful 1.3, 1.4, 1.5 GHz next-generation Itanium 2 processors that contain either 3, 4, or 6 MB ECC L3 caches. High-speed PC2100 ECC DDR SDRAM memory, combined with 64 MB of XceL4 cache, provides outstanding processor-to-memory subsystem performance.The xSeries 455 system architecture is tuned and engineered with the IBM XA-64 core chipset to optimize throughput between the powerful Itanium 2 processors, the XceL4 Server Accelerator Cache, system memory, and PCI-X I/O subsystems.