Asus P5K: CPU features

The Appendix describes the CPU features

and technologies that the motherboard

supports.

CPU features

A

Chapter summary

A

®

A.1 Intel

EM64T ..................................................................................A-1

®

A.2 Enhanced Intel SpeedStep

Technology (EIST) ........................A-1

®

A.3 Intel

Hyper-Threading Technology ...........................................A-3

ASUS P5K

®

A.1 Intel

EM64T

®

• The motherboard is fully compatible with Intel

LGA775 processors running

on 32-bit operating systems.

• The motherboard comes with a BIOS le that supports EM64T. You can

download the latest BIOS le from the ASUS website (www.asus.com/

support/download/) if you need to update the BIOS le. See Chapter 4 for

details.

• Visit www.intel.com for more information on the EM64T feature.

®

• Visit www.microsoft.com for more information on Windows

64-bit OS.

®

Using the Intel

EM64T feature

®

To use the Intel

EM64T feature:

®

®

1. Install an Intel

CPU that supports the Intel

EM64T.

®

®

2. Install a 64-bit operating system (Windows

Vista 64-bit Edition, Windows

XP

®

Professional x64 Edition or Windows

Server 2003 x64 Edition).

3. Install the 64-bit drivers for the motherboard components and devices from

the support CD.

4. Install the 64-bit drivers for expansion cards or add-on devices, if any.

Refer to the expansion card or add-on device(s) documentation, or visit the

related website, to verify if the card/device supports a 64-bit system.

®

A.2 Enhanced Intel SpeedStep

Technology (EIST)

• The motherboard comes with a BIOS le that supports EIST. You can

download the latest BIOS le from the ASUS website (www.asus.com/

support/download/) if you need to update the BIOS. See Chapter 4 for

details.

• Visit www.intel.com for more information on the EIST feature.

A.2.1 System requirements

Before using EIST, check your system if it meets the following requirements:

®

• Intel

processor with EIST support

• BIOS le with EIST support

®

®

• Operating system with EIST support (Windows

Vista, Windows

XP SP2/

®

Windows

Server 2003 SP1/Linux 2.6 kernel or later versions)

ASUS P5K A-1

A.2.2 Using the EIST

To use the EIST feature:

1. Turn on the computer, then enter the BIOS Setup.

2. Go to the Advanced Menu, highlight CPU Conguration,

then press <Enter>.

3. Set the Intel(R) SpeedStep Technology item to [Automatic],

then press <Enter>. See page 4-22 for details.

4. Press <F10> to save your changes and exit the BIOS setup.

5. After the computer restarts, right click on a blank space on the desktop, then

select Properties from the pop-up menu.

6. When the Display Properties

window appears, click the Screen

Saver tab.

7. Click the Power button on the

Monitor power section to open the

Power Options Properties window.

8. On the Power schemes section,

click , then select any option

except Home/Ofce Desktop or

Always On.

9. Click Apply, then click OK.

10. Close the Display Properties

window.

After you adjust the power scheme,

the CPU internal frequency slightly

decreases when the CPU loading is

low.

The screen displays and procedures may vary depending on the operating

system.

A-2 Appendix: CPU features

®

A.3 Intel

Hyper-Threading Technology

®

®

• The motherboard supports Intel

Pentium

4 LGA775 processors with

Hyper-Threading Technology.

®

• Hyper-Threading Technology is supported under Windows

Vista/XP/2003

Server and Linux 2.4.x (kernel) and later versions only. Under Linux, use

the Hyper-Threading compiler to compile the code. If you are using any

other operating systems, disable the Hyper-Threading Technology item in

the BIOS to ensure system stability and performance.

®

• Installing Windows

XP Service Pack 1 or later version is recommended.

• Make sure to enable the Hyper-Threading Technology item in BIOS before

installing a supported operating system.

• For more information on Hyper-Threading Technology, visit www.intel.

com/info/hyperthreading.

Using the Hyper-Threading Technology

To use the Hyper-Threading Technology:

®

®

1. Install an Intel

Pentium

4 CPU that supports Hyper-Threading Technology.

2. Power up the system and enter the BIOS Setup. Under the Advanced Menu,

make sure that the item

Hyper-Threading Technology

is set to [Enabled].

The BIOS item appears only if you installed a CPU that supports

Hyper-Threading Technology.

3. Restart the computer.

ASUS P5K A-3

A-4 Appendix: CPU features