Sara Baca
Mr. Salazar
Computer Science Period 4
12 March 2002

What’s in the Box?
CPU-
     Boards:
	Systems Board or Mother Board
	Expansion Boards
		Memory with RAM, modem, video card, sound card, network cards, slots...
ISA
PCI

Expansion board hooks up to the system board through slots.

Primary difference in types of slots is speed.
CPU (processing chip) lives on the system board
	Intel-Pentiums, Pentium Pro, Pentium III, Pentium IV, celerons

SPEED IS THE DIFFERENCE
Registered by a gigahertz
Chips-Pentium III, 1.4 gigahertz

Generation and Speed
Fans- Cool the chip

SX                                                                DX
	Difference is the ability to do math
SX did not have an integrated math compressor
The DX did

Dual Processing Machine: More than 1 chip on a system board
Cell Technology- The ability for the chips to “grow” together

IO (input/output)-PS2 is the mouse, keyboard
			RS232-cereal
			LPT-printers
			USB-PDA’s, Digital Camera’s, etc. . .
SCSI (Scuzzy)






Types of System Boards:

PCB; Printed Circuit Board, 2mm thick, layers of copper, 1 damaged copper trace can cause problems

XT; PC/XT; very few integrated devices, keyboard was only 10 port

AT; Few integrated ports, supported 286 and 386

Baby/AT; Had ISA slots and limits to use full size ISA cards in 2 slots. . .4 SIMM sockets

SIMM is where RAM goes

ATX; Both the mouse and keyboard used PS2 style ports

LPX; Had riser boars, slots were parallel to the system board instead of perpendicular
Western Digital

NLX; Made by joint ventures of major PC wonders, open source designed, has agp (accelerated graphics port), supported DIMMS (Dual Inline Memory Modules).

System Board Replacement

Obtain and Read a copy of system board manual (RTFM)
Ground yourself
Hold system board by the edges
Put the board on an anti-static surface
Check replacement board for damage
Tighten all components on new board
Set jumpers to match the old board
Remove connections to the systems boards
Remove all IO external connectors
Remove all add on cards from board
Remove CPU and memory and install on new board
Put everything together
Connect IO ports
Turn Computer on and check BIOS
Boot up and make sure everything works
</html><CENTER><fONT SIZE="1" FACE="VERDANA, ARIAL"><A HREF="http://sbaca32.tripod.com"><IMG SRC="https://sbaca32.tripod.com/bball.gif" BORDER=0 ALT="Sara Baca's Homepage"><bR><bR></A>Created by Sara Baca</FONT></CENTER>
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