Gateway / ALR 9000 Series 8U Rackmount Server Chassis
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The CPU drawer is the most complicated and configurable drawer in the system. It contains a complete computer system inside of it, with CPU board(s), RAM memory, I/O board, video card, expansion card slots, floppy disk and hard disk drives, all powered by dual redundant power supplies.
The CPU drawer comes standard with one CPU board, with three CPU sockets. A second CPU board may be installed, bringing the number of available sockets to six. When more than one CPU is installed and the operating system is capable of using Symmetrical Multi-Processing (SMP), the CPU's work together to process data faster. Each CPU board contains its own cache memory. The CPU board(s) are mounted on the 64-bit Advanced Multi-Processor (AMP) bus.

The CPU drawer comes standard with 64-MB of RAM which mounts on the memory board. Up to 4-GB of RAM may be installed on the memory board. The memory board is connected to the AMP bus to ensure that the CPU(s) receive memory contents at the highest possible speed. The memory board contains the logic necessary to perform Error Detection and Correction.

The CPU drawer four PCI slots, and four shared EISA/PCI slot on the system board. The shared slot can hold either one EISA card, or one PCI card, but it cannot hold both at once. The video card must be installed in a primary PCI slot. These are are four PCI slot nearest the side of the system case. The I/O board has the connectors for the keyboard, mouse, serial and parallel ports.

The redundant power supply has four 350-watt power supply modules in an N+1 configuration. If one of the power supply modules fails, an audible alarm will sound to alert the operators.