User`s guide

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2: Baseboard Description
Baseboard Features
Table 2-1 provides a summary of the baseboard features.
Table 2-1 Baseboard Features
Feature Description
Processor Up to four Intel Pentium III Xeon processors, packaged in single edge
contact (S.E.C.) cartridges and installed in 330-pin SC330.1 compliant
edge connectors, operating at 1.8 V to 3.5 V. The baseboard's voltage
regulator is automatically programmed by the processor's VID pins to
provide the required voltage. The baseboard includes connectors for
three 8.3-compliant plug-in voltage-regulator modules (VRM).
Memory, dynamic
random access (DRAM)
Single plug-in module containing a 64- or 72-bit four-way-interleaved
pathway to main memory supporting SDRAM.
256 MB to 16 GB of error correcting code (ECC) memory. A minimum
of four DIMMs must be installed.
Video memory (DRAM) Installed: 2 MB of video memory.
PCI Segment A bus Two 184-pin, 3.3 V keyed, 64-bit PCI full-length expansion connectors
(66/33 MHz).
One DesotoE2 Hot-Plug PCI controller.
PCI Segment B bus Four 184-pin, 5 V keyed, 64-bit PCI full-length expansion connectors
(33 MHz).
One Adaptec AIC-7899 dual channel SCSI-3 Ultra 160 SCSI controller.
One DesotoE2 Hot-Plug PCI controller.
PCI Segment C bus Two 120-pin, 32-bit PCI half-length expansion connectors (33 MHz).
OSB4 I/O APIC.
PCI network interface controller.
ATI Rage IIc video controller.
PCI narrow/wide Adaptec AIC-7880 Ultra SCSI controller.
PCI Bus Master IDE
Interface
The baseboard supports Ultra DMA33 Synchronous Direct Memory
Access (DMA) mode transfers.
USB Interface The baseboard provides a dual external USB connector.
Server Management Thermal/voltage monitoring and error handling.
Front panel controls and indicators (LEDs).