Specifications: - Processor type Intel Pentium 4 that runs at 1.80 GHz internally and 400 MHz externally or Intel Celeron that runs at 1.70 GHz internally and 400 MHz externally L1 cache 8 KB first-level (Pentium 4); 32 KB (16-KB data cache; 16-KB instruction cache) (Celeron). L2 cache 256- or 512-KB (displayed in the system setup program) pipelined-burst, eight-way set associative, write-back SRAM (Pentium 4); 128-KB SRAM that resides in the processors core. The L2 cache runs at the processors internal clock speed (Celeron). - System chipset: Intel 845GL DMA channels: seven Interrupt levels: 24 APIC mode System BIOS chip: 2 Mb (256 KB) System clock: 400-MHz data rate - Expansion Bus Bus types: PCI Bus speed: PCI: 33 MHz PCI connectors: four PCI connector size: 120 pins PCI connector data width: (maximum) 32 bits - Memory Architecture: SDRAM Memory connectors: two Memory capacities: 128-, 256-, or 512-MB Minimum memory: 128 MB Maximum memory: 1 GB Memory type: PC133 SDRAM (non-ECC) - Drives: Externally accessible: two 5.25-inch bays, one 3.5-inch bay Internally accessible: one bay for 1-inch–high IDE hard drive - Ports and Connectors Externally accessible: Serial 9-pin connector; 16550C-compatible Parallel 25-hole connector (bidirectional) Video 15-hole connector Keyboard 6-pin mini-DIN connector Mouse 6-pin mini-DIN connector USB two front-panel and four back-panel USB 2.0–compliant connectors Audio three back miniature connectors for line-in, line-out, and microphone; one front miniature connector for line-out Internally accessible: Primary IDE channel 40-pin connector on PCI local bus Secondary IDE channel 40-pin connector on PCI local bus Floppy drive 34-pin connector - Video Video controller: Intel integrated AGP graphics Integrated AGP graphics uses a maximum of 32 MB of main memory. - Audio Audio controller: Integrated AC97 - Physical Height x Width x Depth 36.8 x 18.4 x 42.6 cm (14.5 x 7.25 x 16.75 inches) Weight 10.4 kg (23 lb)