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System Features

Processors

The VL420 is equipped with a socket 478B Intel Pentium 4 processor. The

478B PGA

Socket

processor is connected to the system board through a Pin Grid Array (PGA)

478B Socket.

A heatsink and fan (not shown) cover the processor to prevent it from

overheating. If the heatsink is removed, the thermal interface material between

the heatsink and the processor must be replaced by a new one. If no thermal

interface is used or the old one is re-used, then cooling may be impaired and

the processor damaged.

To find out more about Pentium 4 technology, refer to the Technical Reference Manual - HP Business

PC Technology.

System Board Switches

The following table gives the functionality and default position of switches on

the system board switch block:

System Board

switches

Switch Default Position Function

1-4 OFF Reserved

5 OFF ON = Clear CMOS

6 OFF ON = Clear Password

7 OFF ON = BIOS crisis mode recovery

8 FF Not used

9 ON OFF = Boot block FLASH protect

10 OFF Not used

Accessory Board Slots

The VL420 has four accessory board slots: three PCI slots and one 1.5V AGP

slot.

PCI 2

AGP

PCI 3

PCI 1

The PCI slots are PCI 2.2 compliant and each slot supports a maximum total

current of 375 mA. The VL420 small form factor PCI slot blank panels are half

size.

Your graphics card is installed in the AGP slot. The 1.5V AGP slot is backward

compatible with AGP 1x, 2x and 4x modes. A latch on one end of the AGP slot

locks the graphics card in place.

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HP e-Vectra Technical Information Seite 21