Asus P4P800: Chapter 2

Chapter 2

This chapter describes the hardware setup

procedures that you have to perform when

installing system components. It includes

details on the switches, jumpers, and

connectors on the motherboard.

Hardware information

3. Position the CPU above the

Gold Mark

socket such that its marked

corner matches the base of the

socket lever.

4. Carefully insert the CPU into the

socket until it fits in place.

The CPU fits only in one correct orientation. DO NOT force the CPU

into the socket to prevent bending the pins and damaging the CPU!

5. When the CPU is in place, push

down the socket lever to secure

the CPU. The lever clicks on the

side tab to indicate that it is

locked.

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Chapter 2: Hardware information

2.4.3 Installing the heatsink and fan

®

®

The Intel

Pentium

4 Processor requires a specially designed heatsink

and fan assembly to ensure optimum thermal condition and performance.

When you buy a boxed Intel Pentium 4 Processor, the package

includes the heatsink, fan, and retention mechanism.

In case you buy a CPU separately, make sure that you use only Intel

certified heatsink and fan.

Follow these steps to install the CPU heatsink and fan.

1. Place the heatsink on top of the installed CPU, making sure that the

heatsink fits properly on the retention module base.

The retention module base is already installed on the motherboard

upon purchase.

You do not have to remove the retention module base when installing

the CPU or installing other motherboard components.

CPU Heatsink

Retention Module Base

Your boxed Intel Pentium 4 Processor package should come with

installation instructions for the CPU, heatsink, and the retention

mechanism. If the instructions in this section do not match the CPU

documentation, follow the latter.

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2-7

2. Position the fan with the retention mechanism on top of the heatsink.

Align and snap the four hooks of the retention mechanism to the holes

on each corner of the module base.

Make sure that the fan and retention mechanism assembly perfectly

fits the heatsink and module base, otherwise you cannot snap the

hooks into the holes.

Retention Hole

Retention Lock

Retention Hook Snapped

to the Retention Hole

Keep the retention locks lifted upward while fitting the retention

mechanism to the module base.

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Chapter 2: Hardware information

3. Push down the locks on the retention mechanism to secure the

heatsink and fan to the module base.

When secure, the retention locks should point to opposite directions.

2.4.4 Connecting the CPU fan cable

When the fan, heatsink, and the retention mechanism are in place,

connect the CPU fan cable to the connector on the motherboard labeled

CPU_FAN.

CPU Fan Connector

(CPU_FAN)

Don’t forget to connect the CPU fan connector! Hardware monitoring

errors may occur if you fail to plug this connector.

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2-9

2.5 System memory

2.5.1 Overview

The motherboard comes with four Double Data Rate (DDR) Dual Inline

Memory Module (DIMM) sockets. These sockets support up to 4GB

system memory using 184-pin unbuffered non-ECC PC3200/2700/PC2100

DDR DIMMs and allow up to 6.4 GB/s data transfer rate.

The following figure illustrates the location of the DDR DIMM sockets.

P4P800

Notes on DDR technology

The DDR SDRAM technology evolved from the mainstream PC66, PC100,

PC133 memory known as Single Data Rate (SDR) SDRAM. DDR memory

however, has the ability to perform two data operations in one clock cycle,

thus providing twice the throughput of SDR memory.

A DDR DIMM has the same physical dimensions as an SDR DIMM, but it

has a 184-pin footprint compared to the 168-pin of the SDR DIMM. Also, a

DDR DIMM is single notched while an SDR DIMM is double notched.

Therefore, a DDR DIMM is not backward compatible with SDR, and should

be installed only in a socket specially designed for DDR DIMMs.

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Chapter 2: Hardware information

DIMM_A

80 Pins104 Pins

P4P800 184-Pin DDR DIMM Sockets

DIMM_A

DIMM_B

DIMM_B

2.5.2 Memory configurations

You may install 64MB, 128MB, 256MB, 512MB, and 1GB DDR DIMMs into

the DIMM sockets using the memory configurations in this section.

Important notes on memory configurations

1. Installing DDR DIMMs other than the recommended configurations

may cause memory sizing error or system boot failure. Use any of

the recommended configurations in Table 1.

2. In dual-channel configurations, install only identical (the same

type and size) DDR DIMM pairs for each channel.

3. Always install DIMMs with the same CAS latency. For optimum

compatibility, it is recommended that you obtain memory modules

from the same vendor. See list of qualified vendors on page 2-13.

4. Make sure that the memory frequency matches the CPU FSB

(Front Side Bus). Refer to Table 2.

5. DIMMs installed into any three sockets will function in single-

channel mode.

6. When all four sockets are populated with 1GB DIMMs (total 4GB),

the system may detect only 3+GB (a little less than 4GB) due to

ICH5R resource allocation.

7. Double-sided DDR DIMMs with X16 (databus width = 16-bit)

memory chips are not supported due to chipset limitation.

8. It is recommended to use the blue DIMM slots first.

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2-11

Table 1 Recommended memory configurations

Sockets

Mode DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2

Single-channel (1) Populated — — —

(2) — Populated — —

(3) — — Populated —

(4) — — — Populated

Dual-channel* (1) Populated

— Populated —

(2) —

Populated — Populated

(3) Populated Populated Populated Populated

* Use only identical DDR DIMM pairs.

* For dual-channel configuration (3), you may:

• install identical DIMMs in all four sockets

or

• install identical DIMM pair in DIMM_A1 and DIMM_B1 (blue sockets)

and identical DIMM pair in DIMM_A2 and DIMM_B2 (black sockets)

Table 2 Memory frequency/CPU FSB synchronization

CPU FSB DDR DIMM Type Memory Frequency

800 MHz PC3200/PC2700*/PC2100 400/333*/266 MHz

533 MHz PC2700/PC2100 333/266 MHz

400 MHz PC2100 266 MHz

• *When using 800MHz CPU FSB, PC2700 DDR DIMMs may run

only at 320MHz (not 333MHz) due to chipset limitation.

• The following FSB/DDR ratios are not supported: 400/333,

400/400, 533/400.

• FSB/DDR setting 800/333 is recognized as FSB/DDR 800/320.

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Chapter 2: Hardware information

2.5.2.2 DDR Qualified Vendor List

The following table lists the PC3200 (DDR400) memory modules that have

been tested and qualified for use with this motherboard.

Size Vendor Model Brand SS/DS Component A* B* C*

256MB A DATA MDGA5F3G315B1EC2 ADATA SS ADD8608A8A-5B • • •

256MB A DATA MDOWB5F3G316B1EAE Winbond SS W942508BH-5 • •

256MB A DATA MDOSS6F3G31JB1EAE SAMSUNG SS K4H560838D-TCC4 • •

256MB Apacer 77.10636.465 SAMSUNG SS K4H560838D-TCC4 • • •

512MB Apacer 77.10736.464 SAMSUNG DS K4H560838D-TCC4 • • •

256MB Corsair CMX256-3500C2 XMS3502v1.1 N/A SS N/A • •

512MB Corsair CMX512-3500C2 XMS3502v1.1 N/A DS N/A • •

256MB Hynix HYMD232646B8J-D43AA Hynix SS HY5DU56822BT-D43 • • •

512MB Hynix HYMD232646B8J-D43AA Hynix DS HY5DU56822BT-D43 • • •

128MB Infineon HYS64D16301GU-5-B Infineon SS HYB25D256160BT-5B • • •

256MB Infineon HYS64D32300GU-5-B Infineon SS HYB25D256800BT-5B • • •

512MB Infineon HYS64D64320GU-5-B Infineon SS HYB25D256800BT-5B • • •

256MB Kingston KVR400X64C25/256 Winbond SS W942508BH-5 • • •

512MB Kingston KVR400X64C25/512 Winbond DS W942508BH-5 •

256MB Kingston KHX3500/256 N/A SS N/A • •

256MB MICRON MT16VDDT3264AG-403B2 MICRON DS MT46V16M8-5TESB • •

512MB PSC AL6D8A53TK1-5B PSC DS A2S56D30ATP • • •

256MB SAMSUNG M368L3223ETM-CCC SAMSUNG SS K4H560838E-TCCC • • •

512MB SAMSUNG M368L6423ETM-CCC SAMSUNG DS K4H560838E-TCCC • • •

256MB Transcend TS32MLD64V4F3 SAMSUNG SS K4H560838D-TCC4 • •

256MB Transcend TS32MLD64V4F3 Mosel SS V58C2256804SAT5 • •

512MB Transcend TS64MLD64V4F3 SAMSUNG DS K4H560838D-TCC4 • •

256MB Transcend TS64MLD64V4F3 Mosel DS V58C2256804SAT5 • • •

256MB TwinMOS M2G9108AFATT9FD81AA4T TwinMOS SS TMD7608F8E50D • • •

512MB TwinMOS M2G9J16AGATT9F081AA4T TwinMOS DS TMD7608F8E50D • •

256MB TwinMOS M2S9108AFAPS9F0811A-T PSC SS A2S56D30ATP • • •

256MB Winbond W9425GCDB-5 Winbond SS W942508CH-5 • • •

512MB Winbond W9451GCDB-5 Winbond DS W942508CH-5 • • •

A* - supports one module inserted in any slot in a Single-channel memory

configuration.

B* - supports one pair of modules inserted into either the blue slots or the black

slots as one pair of Dual-channel memory configuration .

C* - support for 4 modules inserted into the blue and black slots as two pairs of

Dual-channel memory configuration.

Obtain DDR DIMMs only from ASUS qualified vendors for better

system performance.

Make sure to use only the tested and qualified DDR400 DIMMs listed

above. Other DDR DIMMs manufactured by other vendors may not be

suitable for this motherboard. Visit the ASUS website (www.asus.com)

for the latest qualified vendor DDR 400 module list.

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2-13

2.5.3 Installing a DIMM

Follow these steps to install a DIMM.

1. Locate the DIMM sockets in the

motherboard.

P4P800

2. Unlock a DIMM socket by

pressing the retaining clips

outward.

3. Align a DIMM on the socket such

that the notch on the DIMM

matches the break on the socket.

4. Firmly insert the DIMM into the

socket until the retaining clips

snap back in place and the DIMM

is properly seated.

2.5.4 Removing a DIMM

Follow these steps to remove a DIMM.

1. Simultaneously press the

retaining clips outward to unlock

the DIMM.

2. Remove the DIMM from the socket.

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Chapter 2: Hardware information

DIMM_A

80 Pins104 Pins

P4P800 184-Pin DDR DIMM Sockets

DIMM_A

DIMM_B

DIMM_B

Make sure to unplug the power supply before adding or removing

DIMMs or other system components. Failure to do so may cause

severe damage to both the motherboard and the components.

DDR DIMM

Unlocked Retaining Clip

A DDR DIMM is keyed with a notch so that it fits in only one direction.

DO NOT force a DIMM into a socket to avoid damaging the DIMM.

Locked Retaining Clip

Support the DIMM lightly with your fingers when pressing the retaining

clips. The DIMM might get damaged when it flips out with extra force.

2.6 Expansion slots

In the future, you may need to install expansion cards. The motherboard

has five PCI slots and one Accelerated Graphics Port (AGP) slot. The

following sub-sections describe the slots and the expansion cards that

they support.

Make sure to unplug the power cord before adding or removing

expansion cards. Failure to do so may cause you physical injury and

damage motherboard components.

2.6.1 Installing an expansion card

Follow these steps to install an expansion card.

1. Before installing the expansion card, read the documentation that

came with it and make the necessary hardware settings for the card.

2. Remove the system unit cover (if your motherboard is already installed

in a chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the

screw for later use.

4. Align the card connector with the slot and press firmly until the card is

completely seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

2.6.2 Configuring an expansion card

After installing the expansion card, configure the card by adjusting the

software settings.

1. Turn on the system and change the necessary BIOS settings, if any.

See Chapter 4 for information on BIOS setup.

2. Assign an IRQ to the card. Refer to the tables on the next page.

3. Install the software drivers for the expansion card.

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2-15

3. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56,

USBPW78)

Set these jumpers to +5V to wake up the computer from S1 sleep

mode (CPU stopped, DRAM refreshed, system running in low power

mode) using the connected USB devices. Set to +5VSB to wake up

from S3 and S4 sleep modes (no power to CPU, DRAM in slow

refresh, power supply in reduced power mode).

The USBPW12 and USBPW34 jumpers are for the rear USB ports.

The USBPW56 and USBPW78 jumpers are for the internal USB

header that you can connect to the front USB ports.

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Chapter 2: Hardware information

P4P800 USB Device Wake Up

21

2

+5V

+5VS

(Default)

USBPW34

21

2

+5V

+5VS

(Default)

USBPW56

USBPW78

1. The USB device wake-up feature requires a power supply that can

provide 500mA on the +5VSB lead for each USB port. Otherwise,

the system would not power up.

2. The total current consumed must NOT exceed the power supply

capability (+5VSB) whether under normal condition or in sleep

mode.

2.6 Expansion slots

In the future, you may need to install expansion cards. The motherboard

has five PCI slots and one Accelerated Graphics Port (AGP) slot. The

following sub-sections describe the slots and the expansion cards that

they support.

Make sure to unplug the power cord before adding or removing

expansion cards. Failure to do so may cause you physical injury and

damage motherboard components.

2.6.1 Installing an expansion card

Follow these steps to install an expansion card.

1. Before installing the expansion card, read the documentation that

came with it and make the necessary hardware settings for the card.

2. Remove the system unit cover (if your motherboard is already installed

in a chassis).

3. Remove the bracket opposite the slot that you intend to use. Keep the

screw for later use.

4. Align the card connector with the slot and press firmly until the card is

completely seated on the slot.

5. Secure the card to the chassis with the screw you removed earlier.

6. Replace the system cover.

2.6.2 Configuring an expansion card

After installing the expansion card, configure the card by adjusting the

software settings.

1. Turn on the system and change the necessary BIOS settings, if any.

See Chapter 4 for information on BIOS setup.

2. Assign an IRQ to the card. Refer to the tables on the next page.

3. Install the software drivers for the expansion card.

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2-15

Standard Interrupt Assignments

IRQ Priority Standard Function

0 1 System Timer

1 2 Keyboard Controller

2 N/A Programmable Interrupt

3* 11 Communications Port (COM2)

4* 12 Communications Port (COM1)

5* 13 Sound Card (sometimes LPT2)

6 14 Floppy Disk Controller

7* 15 Printer Port (LPT1)

8 3 System CMOS/Real Time Clock

9* 4 ACPI Mode when used

10* 5 IRQ Holder for PCI Steering

11* 6 IRQ Holder for PCI Steering

12* 7 PS/2 Compatible Mouse Port

13 8 Numeric Data Processor

14* 9 Primary IDE Channel

15* 10 Secondary IDE Channel

* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

ABCDEFGH

PCI slot 1 — — — — — shared — —

PCI slot 2 — — — — — — shared —

PCI slot 3 — — — — — — — shared

PCI slot 4 — — — — shared — — —

PCI slot 5 — — — — — shared — —

AGP slot used — — — — — — —

Onboard USB 1.1/2.0 controller — — — — shared shared shared shared

Onboard LAN — — — — — — shared —

Onboard Audio — — used — — — — —

When using PCI cards on shared slots, ensure that the drivers support

“Share IRQ” or that the cards do not need IRQ assignments.

Otherwise, conflicts will arise between the two PCI groups, making the

system unstable and the card inoperable.

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Chapter 2: Hardware information

2.6.3 PCI slots

There are five 32-bit PCI slots on this motherboard. The slots support PCI

cards such as a LAN card, SCSI card, USB card, and other cards that

comply with PCI specifications. The following figure shows a LAN card

installed on a PCI slot.

• The PCI 5 slot and the WiFi slot can not be used at the same time.

• When installing long PCI cards, it is recommended that to install in

PCI slots 2, 4 or 5. Long PCI cards installed in PCI slot 1 may

interfere with the SATA connectors.

• When installing 64-bit PCI cards, it is recommended not to install in

PCI slot 3. 64-bit PCI cards installed in PCI slot 3 may interfere

with the USB connectors.

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2-17

2.6.4 AGP slot

This motherboard has an Accelerated Graphics Port (AGP) slot that only

supports +1.5V AGP cards. When you buy an AGP card, make sure that

you ask for one with +1.5V specification. Note the notches on the card

golden fingers to ensure that they fit the AGP slot on your motherboard.

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Chapter 2: Hardware information

Install only 1.5V AGP cards on this motherboard! 3.3V AGP cards are

not supported in this motherboard.

Keyed for 1.5v

P4P800 Accelerated Graphics Port (AGP)

If installing the ATi 9500 or 9700 Pro Series VGA cards, use only the

card version PN xxx-xxxxx-30 or later, for optimum performance and

overclocking stability.

2.6.5 Wi-Fi slot

The Wi-Fi (Wireless Fidelity) slot will support the ASUS Wi-Fi module

when available. Visit the ASUS website (www.asus.com) for product

updates.

The Wi-Fi slot conforms to the Institute of Electrical and Electronics

Engineers (IEEE) 802.11b standard for wireless devices operating in the

2.4 GHz frequency band. This standard includes provisions for three radio

technologies: direct sequence spread spectrum, frequency hopping

spread spectrum, and infrared. Devices that comply with the 802.11b

standard operate at data rates of up to 11 Mbps for direct sequence

spread spectrum.

The IEEE 802.11b specification allocates the 2.4 GHz frequency band into

14 overlapping operating channels. Each Channel corresponds to a

different set of frequencies. If operating multiple 802.11b wireless PCI

cards in the same vicinity, the distance between the center frequencies

must be at least 25 MHz to avoid interference.

The channels available to an 802.11b wireless PCI card will vary from

country to country. In the United States, the 802.11b standard allocates 11

operating channels for direct sequence devices. Channels 1, 6, and 11 are

independent and do not overlap with each other.

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The PCI 5 slot and the Wi-Fi slot may not be used at the same time.

ASUS P4P800 motherboard user guide

2-19

WIF

P4P800 WIRELESS Connectors

2.7 Jumpers

1. Clear RTC RAM (CLRTC1)

This jumper allows you to clear the Real Time Clock (RTC) RAM in

CMOS. You can clear the CMOS memory of date, time, and system

setup parameters by erasing the CMOS RTC RAM data. The RAM

data in CMOS, that include system setup information such as system

passwords, is powered by the onboard button cell battery.

To erase the RTC RAM:

1. Turn OFF the computer and unplug the power cord.

2. Remove the onboard battery.

3. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the

cap on pins 2-3 for about 5~10 seconds, then move the cap back

to pins 1-2.

4. Replace the battery.

5. Plug the power cord and turn ON the computer.

6. Hold down the <Del> key during the boot process and enter BIOS

setup to re-enter data.

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Chapter 2: Hardware information

Except when clearing the RTC RAM, never remove the cap on

CLRTC1 jumper default position. Removing the cap will cause system

boot failure!

CLRTC1

12 23

Normal Clear CMOS

(Default)

P4P800 Clear RTC RAM

You do not need to clear the RTC when the system hangs due to

overclocking. For system failure due to overclocking, use the C.P.R.

(CPU Parameter Recall) feature. Shut down and reboot the system so

BIOS can automatically reset parameter settings to default values.

2. Keyboard power (3-pin KBPWR)

This jumper allows you to enable or disable the keyboard wake-up

feature. Set this jumper to pins 2-3 (+5VSB) if you wish to wake up the

computer when you press a key on the keyboard (the default value is

[Disabled]). This feature requires an ATX power supply that can supply

at least 1A on the +5VSB lead and a corresponding setting in the

BIOS. (see section 4.5.1 Power Up Control)

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2-21

KBPWR

2312

+5V +5VSB

(Default)

P4P800 Keyboard Power Setting

3. USB device wake-up (3-pin USBPW12, USBPW34, USBPW56,

USBPW78)

Set these jumpers to +5V to wake up the computer from S1 sleep

mode (CPU stopped, DRAM refreshed, system running in low power

mode) using the connected USB devices. Set to +5VSB to wake up

from S3 and S4 sleep modes (no power to CPU, DRAM in slow

refresh, power supply in reduced power mode).

The USBPW12 and USBPW34 jumpers are for the rear USB ports.

The USBPW56 and USBPW78 jumpers are for the internal USB

header that you can connect to the front USB ports.

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Chapter 2: Hardware information

P4P800 USB Device Wake Up

21

2

+5V

+5VS

(Default)

USBPW34

21

2

+5V

+5VS

(Default)

USBPW56

USBPW78

1. The USB device wake-up feature requires a power supply that can

provide 500mA on the +5VSB lead for each USB port. Otherwise,

the system would not power up.

2. The total current consumed must NOT exceed the power supply

capability (+5VSB) whether under normal condition or in sleep

mode.

2.8 Connectors

This section describes and illustrates the internal connectors on the

motherboard.

1. Floppy disk drive connector (34-1 pin FLOPPY1)

This connector supports the provided floppy drive ribbon cable. After

connecting one end to the motherboard, connect the other end to the

floppy drive. (Pin 5 is removed to prevent incorrect insertion when

using ribbon cables with pin 5 plug).

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2-23

NOTE: Orient the red markings o

Always connect ribbon cables with the red stripe to Pin 1 on the

connectors. Pin 1 is usually on the side closest to the power connector

on hard drives and CD-ROM drives, but may be on the opposite side

on floppy disk drives.

FLOPPY1

the floppy ribbon cable to PIN 1.

PIN 1

P4P800 Floppy Disk Drive Connector

10.USB headers (10-1 pin USB_56, USB_78)

If the USB ports on the rear panel are inadequate, a USB header is

available for additional USB ports. The USB header complies with USB

2.0 specification that supports up to 480 Mbps connection speed. This

speed advantage over the conventional 12 Mbps on USB 1.1 allows

faster Internet connection, interactive gaming, and simultaneous

running of high-speed peripherals.

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Chapter 2: Hardware information

You must install the driver before you can use the USB 2.0 capability.

USB+5V

USB_P6-

USB_P6+

GND

NC

USB+5V

USB_P8-

USB_P8+

GND

NC

USB56

USB78

1

1

P4P800 USB 2.0 Header

GND

GND

USB+5V

USB_P5-

USB+5V

USB_P5+

USB_P7-

USB_P7+

NEVER connect a 1394 cable to the USB_56 or USB_78 connectors.

Doing so will damage the motherboard!

The USB port is an optional item and not included in this motherboard

package.

11. GAME/MIDI connector (16-1 pin GAME1)

This connector supports an optional GAME/MIDI module. If a GAME/

MIDI module is available, connect the GAME/MIDI cable to this

connector. The GAME/MIDI port on the module connects a joystick or a

game pad for playing games, and MIDI devices for playing or editing

audio files.

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12.Internal audio connectors (4-pin CD1, AUX1, MODEM)

These connectors allow you to receive stereo audio input from sound

sources such as a CD-ROM, TV tuner, or MPEG card. The MODEM

connector allows the onboard audio to interface with a voice modem

card with a similar connector. It also allows the sharing of mono_in

(such as a phone) and a mono_out (such as a speaker) between the

audio and a voice modem card.

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2-31

+5V

J1B2

J1CY

GND

GND

J1CX

J1B1

+5V

GAME1

P4P800 Game Connector

+5V

J2B2

J2CY

J2CX

J2B1

MIDI_IN

MIDI_OUT

P4P800

Right Audio Channe

CD1(Black) AUX1(White)

P4P800 Internal Audio Connectors

The GAME port module is an optional item not included in this

motherboard package.

MODEM

Modem-Out

Ground

Ground

Ground

Ground

Modem-In

Left Audio Channel

14.Digital Audio connector (6-1 pin SPDIF_OUT)

This connector is for the S/PDIF audio module to allow digital sound

output. Connect one end of the S/PDIF audio cable to this connector

and the other end to the S/PDIF module.

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Chapter 2: Hardware information

13.Front panel audio connector (10-1 pin FP_AUDIO)

This is an interface for the Intel front panel audio cable that allow

convenient connection and control of audio devices.

By default, the pins labeled LINE_OUT_R/BLINE_OUT_R and the pins

LINE_OUT_L/BLINE_OUT_L are shorted with jumper caps. Remove

the caps only when you are connecting the front panel audio cable.

P4P800

SPDIF_OUT

+5V

SPDIFOUT

GND

P4P800 Digital Audio Connector

AGND

+5VA

BLINE_OUT_R

BLINE_OUT_L

FP_AUDIO

NC

MIC2

MICPWR

Line out_R

Line out_L

P4P800 Front Panel Audio Connector

The S/PDIF module is not included in this motherboard package.

15. Serial Port 2 connector (10-1 pin COM2)

This connector accomodates a second serial port using an optional

serial port bracket. Connect the bracket cable to this connector then

install the bracket into a slot opening at the back of the system chassis.

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2-33

COM2

PIN 1

P4P800 Serial COM2 Bracket

The COM2 module is not included in this motherboard package.

16.System panel connector (20-pin PANEL)

This connector accommodates several system front panel functions.

P4P800

*

Requires an ATX power supply

P4P800 System Panel Connectors

Speaker

Connector

Power LED

PLED+

PLED-

+5V

Ground

Ground

Speaker

PWR

Ground

Ground

Reset

ExtSMI#

Ground

IDE_LED+

IDE_LED-

Reset SW

IDE_LED

ATX Power

SMI Lead

Switch*

• System Power LED Lead (3-1 pin PLED)

This 3-1 pin connector connects to the system power LED. The LED

lights up when you turn on the system power, and blinks when the

system is in sleep mode.

• System Warning Speaker Lead (4-pin SPKR)

This 4-pin connector connects to the case-mounted speaker and

allows you to hear system beeps and warnings.

• System Management Interrupt Lead (2-pin SMI)

This 2-pin connector allows you to manually place the system into a

suspend mode, or “green” mode, where system activity is instantly

decreased to save power and to expand the life of certain system

components. Attach the case-mounted suspend switch to this 2-pin

connector.

• ATX Power Switch / Soft-Off Switch Lead (2-pin PWRBTN)

This connector connects a switch that controls the system power.

Pressing the power switch turns the system between ON and SLEEP,

or ON and SOFT OFF, depending on the BIOS or OS settings.

Pressing the power switch while in the ON mode for more than 4

seconds turns the system OFF.

• Reset Switch Lead (2-pin RESET)

This 2-pin connector connects to the case-mounted reset switch for

rebooting the system without turning off the system power.

• Hard disk activity LED (2-pin IDE_LED)

This connector supplies power to the hard disk activity LED. Any read

or write activity of an IDE device cause this LED to light up.

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Chapter 2: Hardware information