The Silicon Graphics Prism Deskside visualization system is housed in the system enclosure as shown in Figure 2-1 and Figure 2-2. The enclosure provides structure and protection for the internal components.

Figure 2-1. System Enclosure Layout (Right-Front View with Side Panel Removed)

Figure 2-2. System Enclosure Layout (Rear View)

The system is powered by an scaleable system node board. The system node board provides a mounting point and connectivity for the processor(s) and memory DIMMs. The node board connects to the interface board via two connectors on its underside. These boards are not customer replaceable.

The system is available with one or two 64-bit Intel processors. These processors are available in different clock speeds and cache sizes. Each processor has on-board cache memory and external cache memory. Each processor is mounted on the system node board under a heat-dissipating protective cover. The processors are not customer replaceable.

The system is configured with a minimum of four DIMMs (2 GB) of memory and a maximum of 12 DIMMs (24 GB) of memory. Your system uses double data rate synchronous dynamic random-access memory (DDR SDRAM). The DIMMs are always installed in groups of four. Each DIMM in a group of four must be the same speed and memory capacity. Different DIMM groups may have different speed and memory capacity values. “Installing or Removing a Memory DIMM” in Chapter 3 provides additional detail on memory DIMMs including removal and replacement rules and procedures. Figure 2-3 shows the memory DIMM group placement.

Figure 2-3. Memory DIMM Group Locations

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Important: The system will not be operational unless four DIMMs in memory group 0 are install.

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Note: The DIMMs used in the Silicon Graphics Prism Deskside visualization platform are not compatible with DIMMs used in the Origin 200, Origin 300, Origin 350 series, Origin 2000, Origin 3000, SGI 3000 series, SGI 2000 series, Onyx systems, Fuel, Octane Octane2, O2, O2+, or Tezro systems.

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The base I/O board is the full-length PCI board that is installed in PCI slot 1, (the top PCI slot). It provides the following I/O connectors and interfaces for the system (see Figure 2-4):

The I/O board also contains the non-volatile RAM and time-of-day clock for the system.

For technical specifications and pinouts of these connectors, see Appendix A, “Technical Specifications and Pinouts”.

Figure 2-4. System Base I/O Board External Connectors

The 36-pin MDR serial connector on the base I/O board can connect to multiple serial devices by way of the serial adapter cable shown in Figure 2-5. Leave the serial adapter cable unplugged if you are not connecting any serial devices to the system.

Figure 2-5. Serial Port Adapter Cable Connection

The standard (static) I/O daughter card is a long narrow board that is mounted on the rear of the enclosure just below the power supply. It uses one of the system PCI slots. This card acts as an extension of the base I/O board and is not customer replaceable. The board provides the following connectors (see Figure 2-6):

For technical specifications and pinouts of these connectors, refer to Appendix A, “Technical Specifications and Pinouts”..

Figure 2-6. Static I/O Daughter Card Connectors

The Silicon Graphics Prism Deskside visualization system supports one or two internal hard disk drives. These drives provide the unit with large amounts of storage and quick access times.

The hard disk drives in the system are sled mounted (see Figure 2-7). The drive sleds provide a safe and easy way to install and remove the drives. The drive sleds also provides a positive, locking connection to the backplane, which connects the disk drives to the base I/O board (see Figure 2-8).

Figure 2-7. Hard Disk Drive Sled

Figure 2-8. Internal Hard Disk Drive Locations

The disks are numbered 1 and 2, with 1 being the bottom disk and 2 being the top. Disk 1 is the system disk, which has the Linux operating system installed on it. Your system will not function without the system disk.

For information on removing or installing an internal hard disk drive, refer to “Installing or Removing Internal Hard Disk Drives” in Chapter 3.

Your system supports an optional internal DVD-ROM drive.The drive is installed in the 5.25-in. drive bay, as shown in Figure 2-8. For information about removing the DVD-ROM drive and installing a new one, refer to “Replacing the DVD-ROM Drive” in Chapter 3.

The graphics slots are located at the center-rear section of the system (near the bottom of the enclosure), as shown in Figure 2-9. The graphics board(s) installed are tested and configured to work with your Silicon Graphics Prism Deskside system. You should not replace them with graphics cards from other systems unless directed to do so by your service provider.

Figure 2-9. Locating the Graphics Board(s)

The Prism deskside system graphics board has the following features:

Each deskside system supports eight 64-bit, PCI-X slots which are divided into four buses, as shown in Figure 2-10. Note that the top two slots of bus 1 are always occupied by the static I/O daughter board and the base I/O PCI card. The system's base I/O board always occupies bus 1, slot 1, and the static I/O daughter board is permanently installed in the top slot (bus 1, slot 2). The static I/O daughter card provides the USB, L1 USB, serial console, and ImageSync connectors for the deskside unit.

The remaining six slots are available for other optional PCI/PCI-X boards. Each bus can support card speeds of up to 133 MHz. The slots are divided into buses, as shown in Figure 2-10.

Follow these general rules when installing PCI and PCI-X boards on the PCI-X buses:

For a list of available PCI boards see “PCI Boards” or contact your SGI sales representative.

The power supply for the system is located in the top rear quadrant of the chassis, as shown in Figure 2-11.

Figure 2-11. Power Supply Location

The power supply provides up to 700 watts of power to the node and interface boards, internal hard disk drives, DVD-ROM drive, and other optional components installed in the enclosure.

The system uses a total of eight fans to cool the internal components. The following components make up the cooling system (see Figure 2-12):

Various optional components, peripherals, and upgrades are available for your system. The following sections describe some of these options:

For more information about upgrading your system contact your SGI sales representative.