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System Overview 1-35
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Microprocessor type . . . . . . Intel Pentium II microprocessor with MMX
technology
Microprocessor speed. . . . . 266, 333, 350, 400, or 450 MHz (the GX1p
is only available in 400 or 450 MHz)
External system clock . . . . . 66/100 MHz
Internal cache. . . . . . . . . . . . 32-KB (16-KB data cache and 16-KB instruc-
tion cache)
Math coprocessor . . . . . . . . internal to the microprocessor
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System chip set . . . . . . . . . . Intel 440BX AGPSet chip set
Data bus width. . . . . . . . . . . 64 bits
Address bus width. . . . . . . . 32 bits
DMA channels . . . . . . . . . . . seven
Interrupt levels . . . . . . . . . . . 15
Flash EPROM (BIOS) . . . . . . 2 Mb
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Bus types. . . . . . . . . . . . . . . PCI and ISA (PCI bus complies with PCI
Specification 2.1)
Bus speeds . . . . . . . . . . . . . PCI: 33 MHz; ISA: 8.33 MHz
PCI expansion-card
connectors:
Low-profile
computers. . . . . . . . . . . . two (one PCI connector and one ISA
connector share an expansion-card slot)
Midsize computers . . . . three (one PCI connector and one ISA
connector share an expansion-card slot)
or
five (two share expansion-card slots)
Mini tower
computers. . . . . . . . . . . . five (two PCI connectors share expansion-
card slots with ISA connectors)
OptiPlex NX1
computers . . . . . . . . . . . one