Support for one or two Intel® Xeon® processors with an 800MHz system bus Processing power and scalability to meet the dynamic demands of general-purpose servers. Support for Hyper-Threading Technology, Intel® Extended Memory 64 TechnologyΦ (Intel® EM64T), and Enhanced Intel SpeedStep® Technology Compatibility with 64-bit-capable operating systems and applications; reduced power consumption for lower-cost operation. Intel® E7520 Chipset Enterprise performance and reliability in a purpose-built server chipset. Dual-channel memory with support for Registered Error-Correcting Code (ECC) DIMM sockets and memory sparing and mirroring. Supports either six DDR266/333 DIMMs or eight DDR2 400 DIMMs4 Powerful and reliable memory subsystem with capacity to support diverse server tasks; two memory configurations for easy customization. High-performance I/O with support for PCI Express*, PCI-X, and PCI. Reduction of data bottlenecks to provide the bandwidth necessary for I/O intensive applications in addition to flexibility and scalability. Optional integrated Ultra320 SCSI4 controller with support for RAID 0 and 1; optional modular ROMB5 (RAID on motherboard) with support for RAID 0, 1, 5, 10, and 50 High-performance data transfer with embedded RAID functionality for outstanding data protection Processor One or two Intel® Xeon® processors with an 800MHz system bus. System Memory Memory Capacity Supports Registered ECC DIMMs that must be populated in pairs. DDR 266/333 - Six DIMM sockets for up to 24 GB of DDR 266 or 12 GB of DDR 333 DDR2 400 - Eight DIMM sockets for up to 16GB of DDR2 400. Memory Type Registered ECC DDR 266/333 SDRAM 72-bit, 184-pin gold-plated DIMMs or registered ECC DDR2 400 72-bit, 240-pin gold-plated DIMMs Reliability Features Corrects single-bit errors and detect double-bit errors (using ECC memory); supports x4 Intel® Single Device Data Connection (SDDC), scrubbing, retry on uncorrectable errors, memory mirroring, memory sparing4 Integrated On-Board Chipset Intel® E7520 Chipset Intel® Server Network Connections One Intel® 82541PI Gigabit Ethernet Controller and One Marvell* Yukon* -EC 88E8050 PCI Express* Gigabit Ethernet Controller, supporting teaming and failover, 10BASE-T, 100BASE-TX, and 1000BASE-T, RJ45 output. Integrated Management Controller National Semiconductor* PC87431M Platform Instrumentation ASIC Graphics ATI* RAGE* XL SVGA PCI video controller with 8 MB of video memory Integrated Storage Support Parallel ATA Single-channel ATA 100 (integrated single connector) supporting two IDE devices Serial ATA Dual-channel SATA 100 (two connectors on the server board) supporting integrated mirroring and striping (RAID 0 and 1) Ultra320 SCSI E7520BD2V and SE7520BD2VD2: One Ultra320/LVD channel via either the LSI Logic* 53C1020 or LSI Logic 53C1020A SCSI controller, with integrated mirroring and striping (RAID 0 and 1), and support for modular ROMB (Intel® RAID Controller SRCZCRX)6 SE7520BD2SCSI and SE7520BD2SCSID2: Two Ultra320/LVD channels via the LSI Logic 53C1030 SCSI controller and connected via two internal 68-pin-wide connectors; maximum data transfer 320 MB/sec on each Ultra320/LVD channel, with integrated mirroring and striping (RAID 0 and 1), and support for modular ROMB (Intel® RAID Controller SRCZCRX)6 Input/Output PCI Six total slots6: one PCI Express x8, one PCI Express x4 (physical connector is a x8 slot), one PCI-X 133MHz, two PCI-X 100MHz, one PCI 32-bit/33MHz 5V IDE One legacy IDE connector for support of up to two IDE devices USB Two USB 2.0 ports2 (rear) and two USB ports via internal headers for up to four USB ports. SE7520BD2 and SE7520BD2SCSI have three USB 2.0 ports on the rear and two USB ports via internal headers. Serial Ports One external DB9 serial port; one internal serial port (which can become Emergency Management Port if system-management card supports EMP) Floppy Controller 1.44 MB and 2.88 MB, 3-mode support Keyboard/Mouse Two PS/2 ports, 8240A-compatible