®

P4TIntel® 850 ATX

2

©2000

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72 5

10 91317

14

PS/2

MAIN_FAN

CHASSISPANEL

P4TPCI_FAN

DIP

Sw

itche

s

®

LED

CLRTC

SCSILED

Socket 423

COM1

COM2

AT

X P

ower

Con

nect

or

USB2

WOL

AUX Power Connector

CPU_FAN

ATX12V

USBPWR

INTRUSION

JEN

IR SMB

24.4 cm(9.6inch)

30.5

cm

(12i

nch)RJ-45

USB

Intel82801BAICH2

Intel82850MCH

IntelFWH

SuperI/O

15

16

17

P4T Onboard LED

ON OFFStandbyPower

PoweredOff

P4T

®

18

P4T DIP Switches

P4T

®

1. Frequency Multiple2. Frequency Multiple3. Frequency Multiple4. Frequency Multiple 5. Reserved

6. Frequency Selection7. Frequency Selection8. Frequency Selection9. Frequency Selection

10. Frequency Selection

OFF

ON

12

34

56

78

910

ONSW1

™

™ ™

P4T JumperFree™ Mode Setting

P4T

®

Jumper JumperFree

1 2 2 3

JEN

OFF

ON

12

34

56

78

910

SW1

19

P4T

®

P4T USB Device Wake Up

Disable(Default)

Enable

1 2 2 3

USBPWR

20

P4T

®

P4T CPUExternal Frequency Selection

CPU/DRAMPCI BUS

→→

CPU/DRAMPCI BUS

→→

CPU/DRAMPCI BUS

→→

122.0MHz40.7MHz

112.0MHz37.3MHz

115.0MHz38.3MHz

108.0MHz36.0MHz

120.0MHz40.0MHz

118.0MHz39.3MHz

130.0MHz43.3.0MHz

110.0MHz36.7MHz

133.0MHz44.3MHz

CPU/DRAMPCI BUS

→→

100.0MHz33.3MHz

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

103.0MHz34.3MHz

ON

12

34

56

78

910

105.0MHz35.0MHz

ON

12

34

56

78

910

ON

12

34

56

78

910

ON

12

34

56

78

910

125.0MHz41.7MHz

128.0MHz42.7MHz

SW1

21

100 33.3 66.9 [ON] [OFF] [ON] [ON] [ON]103 34.3 68.7 [OFF] [OFF] [ON] [ON] [ON]105 35.0 70.0 [ON] [ON] [OFF] [ON] [ON]108 36.0 72.0 [OFF] [ON] [OFF] [ON] [ON]110 36.7 73.3 [ON] [OFF] [OFF] [ON] [ON]112 37.3 74.7 [OFF] [OFF] [OFF] [ON] [ON]115 38.3 76.7 [ON] [ON] [ON] [OFF] [ON]118 39.3 78.7 [OFF] [ON] [ON] [OFF] [ON]120 40.0 80.0 [ON] [OFF] [ON] [OFF] [ON]122 40.7 81.3 [OFF] [OFF] [ON] [OFF] [ON]125 41.7 83.3 [ON] [ON] [OFF] [OFF] [ON]128 42.7 85.3 [OFF] [ON] [OFF] [OFF] [ON]130 43.3 86.7 [ON] [OFF] [OFF] [OFF] [ON]133 44.3 89.1 [OFF] [OFF] [OFF] [OFF] [ON]120 30.0 60.0 [ON] [ON] [ON] [ON] [OFF]133 33.3 66.7 [OFF] [ON] [ON] [ON] [OFF]133 33.4 66.8 [ON] [OFF] [ON] [ON] [OFF]136 34.0 68.0 [OFF] [OFF] [ON] [ON] [OFF]138 34.5 69.0 [ON] [ON] [OFF] [ON] [OFF]140 35.0 70.0 [OFF] [ON] [OFF] [ON] [OFF]142 35.5 71.0 [ON] [OFF] [OFF] [ON] [OFF]144 36.0 72.0 [OFF] [OFF] [OFF] [ON] [OFF]145 36.3 72.5 [ON] [ON] [ON] [OFF] [OFF]148 37.0 74.0 [OFF] [ON] [ON] [OFF] [OFF]150 37.5 75.0 [ON] [OFF] [ON] [OFF] [OFF]152 38.0 76.0 [OFF] [OFF] [ON] [OFF] [OFF]154 38.5 77.0 [ON] [ON] [OFF] [OFF] [OFF]156 39.0 78.0 [OFF] [ON] [OFF] [OFF] [OFF]133 26.5 53.2 [ON] [OFF] [OFF] [OFF] [OFF]150 30.0 60.0 [OFF] [OFF] [OFF] [OFF] [OFF]

22

P4

T

®

P4T

CP

U E

xternal

Clo

ck (BU

S) F

requ

ency

Selectio

n

8.0x

ON

1 2 3 4 5 6 7 8 9 10

SW

1

9.0x

ON

1 2 3 4 5 6 7 8 9 10

10.0x

ON

1 2 3 4 5 6 7 8 9 10

11.0x

ON

1 2 3 4 5 6 7 8 9 10

12.0x

ON

1 2 3 4 5 6 7 8 9 10

13.0x

ON

1 2 3 4 5 6 7 8 9 10

14.0x

ON

1 2 3 4 5 6 7 8 9 10

15.0xON

1 2 3 4 5 6 7 8 9 10

16.0x

ON

1 2 3 4 5 6 7 8 9 10

23

RIMMA1RIMMA2

RIMMB1RIMMB2

128MB RDRAM

128MB RDRAMC-RIMM

C-RIMM

a.

RIMMA1RIMMA2

RIMMB1RIMMB2

128MB RDRAM

128MB RDRAM

128MB RDRAM

128MB RDRAMc.

RIMMA1RIMMA2

RIMMB1RIMMB2

128MB RDRAM

128MB RDRAMC-RIMM

C-RIMM

b.

RIMMA1 RDRAM x 1(Rows 0&1) C-RIMM ( )

RIMMA2 RDRAM x 1(Rows 2&3) C-RIMM ( )

RIMMB1 RDRAM x 1(Rows 4&5) C-RIMM ( )

RIMMB2 RDRAM x 1(Rows 6&7) C-RIMM ( )

=( 2GB Max )

24

NOTCH KEYS

CONNECTORS

RDRAM (with heat spreader)MOUNTING NOTCH

RIBS (inside socket)EJECTOR(TOP VIEW)

P4T

®

P4T 184-Pin RIMM Sockets

RIMM Sockets

Channel A

Channel B

RIMMA2RIMMA1

RIMMB2RIMMB1

C-RIMMRIMM with Heat Spreader

25

Rubber Pad Metal Baseboard

2 Metal heatsink retaining clips

4 Copper captive nuts

4 Pad Head screws

2 Heatsink support bases

P4T Socket 423

P4T

®

Gold ArrowPin 1

Pentium 4Processor

Pin 1

4 Washers

26

Rubber Pad Metal Baseboard

Washer

Copper captive nut

®

Motherb

oard�

Mothe

rboard

Washer

27

28

29

1

2

1

3

2

30

®

31

32

— — —— — —

— — —— — —— — —

— — —— — —— — —

P4T Accelerated Graphics Port (AGP PRO)

TOP VIEW

Rib (inside slot) Rib20-pin bay 28-pin bay

AGP Card without Retention Notch

P4T

®

33

PS/2 Mouse (6-pin Female)

PS/2 Keyboard (6-pin Female)

34

Parallel Port (25-pin Female)

COM2COM1Serial Ports (9-pin Male)

USB 2

USB 1

35

Primary Secondary Slave UltraDMA/100 UltraDMA/66

MasterUltraDMA/100 UltraDMA/66

RJ-45 Port

P4T

®

P4T IDE Connectors

NOTE: Orient the red markings(usually zigzag) on the IDEribbon cable to PIN 1.

Sec

onda

ry ID

E C

onne

ctor

PIN 1

Prim

ary

IDE

Con

nect

or

36

P4T

®

NOTE: Orient the red markings onthe floppy ribbon cable to PIN 1.

P4T Floppy Disk Drive Connector

PIN 1

FLOPPY

P4T

®

P4T 12-Volt Cooling Fan Power

MAIN_FAN

CPU_FAN

GN

D

Rot

atio

n+

12V PCI_FAN

GND

Rotation+12V

GND

Rotation+12V

(for power supply fan)

(for chassis fan)

37

SM

BC

LK

Gro

und

SM

BD

ATA

+5V

1

P4T SMBus Connector

SMBP4T

®

P4T Chassis Open Alarm Lead

P4T

®

+5V

SB

_MB

Cha

ssis

Sig

nal

GN

D

CHASSIS1

38

P4T Wake-On-LAN Connector

IMPORTANT: Requires an ATX powersupply with at least 720mA +5 voltstandby power

+5 Volt StandbyPME

Ground

WOL

P4T

®

P4T

®

P4T Wake-On-Ring Connector

Ring# Ground

2 1

WOR

39

+

1

P4T SCSI LED ConnectorSCSILED

P4T

®

-

P4T Hard Disk Drive Activity LED

TIP: If the case-mounted LEDdoes not light, try reversing the2-pin plug.

HDDLEDP4T

®

P4T

®

P4T USB Headers

USB2

15

610 1: USB Power2: USBP2–3: USBP2+4: GND5: NC

6: USB Power7: USBP3–8: USBP3+9: GND

40

P4T Infrared Module Connector

P4T

®

Front View Back View

+5VIRTX

IRRX(NC)GND

+5V

IRR

X

IRT

X

(NC

)

GN

D

IR

1

41

P4T

®

P4T ATX &Auxiliary Power Connectors AUXPWR

CO

M

+3V

+5VATX12V

+12V DCCOM

+12V DCCOM

Pin 1 Pin 1

Pin 1

ATXPWR

+3.3VDC-12.0VDCCOMPS_ON#

COMCOM

COM-5.0VDC+5.0VDC+5.0VDC

PWR_OK

+12.0VDC

+3.3VDC+3.3VDC

COM

+5.0VDCCOM

+5.0VDC

COM

+5VSB

P4T

®

P4T System Panel Connectors* Requires an ATX power supply.

PLE

D

Gro

und

MLE

D

PW

R

+5

V

Key

lock

+5V Spe

aker

SpeakerConnector

Power LED

Gro

und

+5

V

Reset SW

SMI Lead

Message LED

Ext

SM

I#

Gro

und

Res

etG

roun

dG

roun

d

Gro

und

Keyboard Lock

ATX PowerSwitch*

42

43

44

46

47

48

®

49

50

MAIN

ADVANCED

POWER

BOOT

EXIT

<F1> or <Alt + H>

<Esc> or<Alt + X>

← or → (keypad arrow)

↑ or ↓ (keypad arrows)

- (minus key)

+ (plus key) or spacebar

<Enter>

<Home> or <PgUp>

<End> or <PgDn>

<F5>

<F10>

51

52

53

54

55

56

57

P4T

®

P4T Clear RTC RAM

Short solder pointsto Clear CMOS

CLRTC

Intel I/OController

Hub(ICH2)

58

™

59

60

61

62

63

64

65

66

67

68

69

70

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72

73

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75

76

77

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•

•

•

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•

•

•

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79

•

•

•

•

•

•

80

81

82

83

84

85

86

87

88

Win

dow

s 98

Window

s 98

Win

dow

s 98

Window

s 98