The Silicon Graphics™ 750 system is an Intel® Itanium™-based system. It features the Intel 82460GX PCI chipset, multiple 64-bit, 66-MHz PCI expansion slots, and support for AGP Pro 110 graphics cards.
This chapter describes the main features of the Silicon Graphics 750 system, and provides basic system setup information in the following sections:
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Warning: Only SGI service engineers may access the inside of the system.
Remove the Silicon Graphics 750 system from the packaging container and check that the following items are included:
Silicon Graphics 750 system
Silicon Graphics 750 Quick Start Guide
Silicon Graphics 750 Documentation CD
Inspect the above items for evidence of mishandling during transit. If the contents appear damaged, file a damage claim with the carrier immediately.
Save the boxes and packing materials for future use.
 | Note: If your system ships with software or media not listed above, please see its accompanying documentation for installation instructions. |
| Warning: To avoid personal injury when unpacking the system, use only a mechanical assist unit to lift the system off the shipping pallet. The system weighs approximately 84 pounds (38 kilograms). |
Table 1-1 shows the physical specifications for the Silicon Graphics 750 system.
Table 1-1. Silicon Graphics 750 Physical Specifications
Feature | Specification |
|---|---|
Dimensions: | |
Weight (maximum configuration) | 84 pounds (38.1 kg) |
Temperature | |
Humidity (non-operating) | < 95% RH, non-condensing |
Shock (non-operating): | |
Vibration (non-operating): | |
The Silicon Graphics 750 power supply is rated for a maximum input AC power consumption of 800 watts (7.5 amps at 100 Volts, 3.75 amps at 220 volts).
A fully loaded Silicon Graphics 750 system has a maximum input AC power consumption of 500 watts (510 volt-amps, 4.6 amps at 110 Volts, 2.3 amps at 220 volts).
The Silicon Graphics 750 operates reliably within normal office environments. Select a site that meets these criteria:
Near a properly earthed, grounded, three-pronged power outlet, as follows:
In the U.S. and Canada: a NEMA 5-15R outlet for 100-120 V or a NEMA 6-15R outlet for 200-240 V.
In other geographic areas: a properly earthed, grounded outlet in accordance with the local electrical authorities and electrical code of the region.
Clean and relatively free of excess dust.
Well-ventilated and away from sources of heat, with the ventilation openings on the system kept free of obstructions.
Away from sources of vibration or physical shock.
Isolated from strong electromagnetic fields and line noise caused by electrical devices such as elevators, copy machines, air conditioners, large fans, large electric motors, radio and TV transmitters, and high-frequency security devices.
Access space provided so the power cords can be unplugged from the power supply or the wall outlet. This is the only way to remove AC power from the system.
Clearance provided for cooling and airflow.
Caution: In regions that are susceptible to electrical storms, it is recommended that you plug your system into a surge suppressor and disconnect any telecommunication lines during electrical storms.
This section describes the front controls and indicators of the Silicon Graphics 750 system, as shown in Figure 1-1.
Table 1-2 describes the front controls and indicators that are shown in Figure 1-1.
Table 1-2. Front Controls and Indicators
Number | Item |
|---|---|
1 | Power switch |
2 | Power LED |
3 | Hard drive activity LED |
4 | LAN LED |
5 | USB ports (2) |
6 | Line output port |
7 | Line input port |
8 | Microphone input port |
9 | CD-ROM drive |
10 | 3.5-inch SuperDisk™ drive (compatible with 1.44 MB and LS-120 diskettes) |
This section describes the rear panel I/O ports and other features as shown in Figure 1-2.
Table 1-3 describes the rear panel I/O ports and features that are indicated in Figure 1-2.
Table 1-3. Rear Panel I/O Ports and Features
Number | Item |
|---|---|
1 | 9-pin serial port |
2 | PS/2™-compatible mouse connector |
3 | PS/2-compatible keyboard connector |
4 | USB ports (2) |
5 | Line input port |
6 | Line output port |
7 | LAN (10baseT/100baseTX Ethernet™) |
8 | Cooling fans |
9 | AC power input socket |
10 | Disk adapter: QLogic™ 12160 PCI SCSI HBA (LVD 160 MB/sec. (Ultra3) or SE Fast-20) |
11 | Video output: ATI® XPERT 2000 PRO™ AGP |
| Note: The Silicon Graphics 750 system has a QLogic 12160 SCSI Host Bus Adapter installed with two external SCSI connectors accessible from the system rear panel. The components in Figure 1-2 are for illustration purposes only. The actual card location may vary slightly. |
The peripheral bay can accommodate one 3.5-inch and three 5.25-inch devices. The CD-ROM drive and the Superdisk (floppy) drive are housed in the peripheral bay. Both devices are accessible from the front of the chassis, as shown in Figure 1-1.
The hard drive bay is designed for 3.5-inch hard drives and can accommodate up to five 1-inch-high drives.
The chassis is configured with a single, 800-watt power supply. It is capable of providing full rated output power with input voltages ranging from 100 to 240 VAC. The power supply features automatic power factor correction (PFC). See “Power Consumption ” for additional power-related information.
The Silicon Graphics 750 system supports eight fans in the following four separate zones:
Zone 1 - Processor: two fan headers for two 120-mm fans.
Zone 2 - Memory: one fan header for one 80-mm fan.
Zone 3 - I/O: two fan headers for one 92-mm and one 60-mm fan.
Zone 4 - Exhaust: three fan headers for three 80-mm fans.
After making sure that you have set up the system properly and connected all the required cables, you may now power on the system by pressing the power button.
The system starts and displays a welcome message. After that, a series of power-on self-test (POST) messages appear. The POST messages indicate whether or not the system is running correctly.
| Note: If the system does not turn on or boot after you press the power button, see the next section for the possible causes of the boot failure. |
If the system does not boot after you have applied power, check whether the following factors might have caused the boot failure.
The external power cable may be loosely connected.
Check the power cable connection from the power source to the power socket on the rear panel. Make sure that each cable is properly connected to each power supply.No power comes from the grounded power outlet.
Ask an electrician to check your power outlet.Note: If you have performed the preceding actions and the system still fails to boot, ask your dealer or a qualified technician for assistance.
Table 1-4 describes the chassis features.
Table 1-4. Chassis Features Summary
Feature | Comment |
|---|---|
System chassis | Designed to operate in a standard office environment. Mid-tower (deskside) design capable of operating from a standard AC power outlet. |
| The peripheral bay can accommodate as many as three 5.25-inch media and one 3.5-inch media devices. |
| The hard drive bay accepts 3.5-inch drives. It can accommodate as many as five 1-inch devices. |
| The plastic front bezel provides airflow and easy access to the peripheral and hard drive bays. The removable top and side covers provide proper airflow and easy access to components inside the system. Only technically qualified personnel should remove the system covers. |
Power system | An 800-watt power supply that is capable of operating over input voltage ranges of 100-240 VAC. Includes two integrated 80-mm fans for cooling. See “Power Consumption ” for additional power-related information. |
Cooling system | The system has provisions for as many as eight fans for cooling within four separate cooling zones. There are two 120-mm fans, one 92-mm fan, four 80-mm fans, and one 60-mm fan. |
System security | A side lock and chassis intrusion switch provides security against system tampering. The intrusion switch can be used with system level software (when it becomes available) to warn of chassis intrusion. |