IBM 88554RU Installation Guide - Page 16
Features, 1.1.1 Comparing the x455 with the x450
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1.1 Features The following are the key features of the x455: One-way or two-way Intel Itanium 2 models, upgradable to 4-way in a single node and 16-way in a 4-node partition. 64 MB XceL4 Server Accelerator Cache providing an extra level of cache, upgradeable to 256 MB in a 4-node partition. 1 GB or 2 GB RAM standard, upgradeable to 56 GB in a single node and 224 GB in a 4-node partition. Available options are 512 MB, 1 GB, and 2 GB ECC DDR SDRAM RDIMMs. Memory enhancement such as memory mirroring, Chipkill™, Memory ProteXion, and hot swap. Dual channel Ultra320 SCSI/RAID controller. Six 64-bit Active PCI-X slots: Two 133 MHz, two 100 MHz, and two 66 MHz, upgradeable to 24 x 64-bit PCI-X slots in a four-node partition. Scalable system partitioning in two-node and four-node configurations via three scalability ports. Connectivity to an RXE-100 external enclosure for an additional 12 PCI-X slots, upgradeable to 24 additional PCI-X slots in a 4-node partition. Two hot-swap 1-inch drive bays, upgradeable to eight in a four-node partition. Support for major storage subsystems, including SCSI and Fibre Channel. Light path diagnostics for troubleshooting. Remote Supervisor Adapter (RSA) for systems management and remote diagnostics. Integrated dual 10/100/1000 Mbps Ethernet controller. Integrated ATI Rage XL with 8 MB video RAM. Three USB ports and one serial port. Two 1050 W hot swap power supply. 24x combination DVD/CD-RW drive. 4U x 26" rack drawer design. 1.1.1 Comparing the x455 with the x450 The x455 builds on the proven and popular x450 and brings a number of enhancements. Table 1-1 on page 3 summarizes the differences and enhancements between the two servers. 2 IBM xSeries 455 Planning and Installation Guide Eserver
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