Microprocessor Microprocessor type Intel® Pentium® 4 microprocessor that runs at 1.50, 1.60, 1.70, 1.80, 1.90, or 2.0 GHz internally and 400 MHz externally L1 cache 8 KB first-level L2 cache integrated 256-KB at full microprocessor speed System Information System chip set Intel 845 DMA channels four Interrupt levels 15 System BIOS chip 4 Mb (512 KB) System clock 400 MHz data rate Expansion Bus Bus types PCI and AGP Bus speed PCI: 33 MHz; AGP: 66 MHz AGP connector one AGP connector size 172 pins AGP connector data width (maximum) 32 bits AGP bus protocols 4x/2x modes at 1.5 V PCI connectors four PCI connector size 120 pins PCI connector data width (maximum) 32 bits Memory Architecture SDRAM PC133 Memory connectors two Memory capacities 64-, 128-, 256-, and 512-MB non-ECC or ECC SDRAM Minimum memory1 64 MB Maximum memory 512 MB Memory type PC133 (non-ECC or ECC) BIOS address F8000h 1 Microsoft requires a minimum of 128 MB of memory for Microsoft® Windows® XP. Drives Externally accessible two 5.25-inch bays two 3.5-inch bays Internally accessible two bays for 1-inch–high IDE hard drives Available devices ATA-66 or ATA-100 Ultra DMA hard drive, CD drive, Zip drive, DVD drive, and CD-RW 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 or USB connector Mouse 6-pin mini-DIN connector or USB connector USB two front-panel and two back-panel USB–compliant connectors Headphone front-panel miniature jack Audio2 three miniature jacks for line-in, line-out, and microphone 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 2 Present only on computers with integrated audio capabilities. Audio3 Audio controller Analog Devices AD1885 AC97 Codec 3 Present only on computers with integrated audio capabilities. Video Video controller AGP 4X
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