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Built upon the functionality and the capability of the 5000X (Greencreek) chipset, the X7DA3 motherboard provides the performance and feature set required for dual processor-based servers with configuration options optimized for communications, presentation, storage, computation or database applications. The 5000X (Greencreek) chipset supports single or dual Xeon 64-bit dual core processor with front side bus speeds of up to 1.333 GHz. The chipset consists of the 5000X (Greencreek) Memory Controller Hub (MCH), the Enterprise South Bridge 2 (ESB2), and the I/O subsystem (PXH-V). The 5000X (Greencreek) MCH chipset is designed for symmetric multiprocessing across two independent front side bus interfaces. Each front side bus uses a 64-bit wide, 1.333 GHz data bus that transfers data at 10.7 GB/sec. The MCH chipset connects up to 8 Fully Buffered DIMM modules, providing a total of 32.0 GB/s for DDR2 667/533 memory. The MCH chipset also provides one x8 PCI-Express and one x4 ESI interface to the ESB2. In addition, the 5000X (Greencreek) chipset offers a wide range of RAS features, including memory interface ECC, x4/x8 Single Device Data Correction, CRC, parity protection, memory mirroring and memory sparing.