A-2 Appendix: CPU features
A.1 Intel® EM64T

Using the Intel® EM64T feature

To use the Intel® EM64T feature:
1. Install an Intel® Pentium® 4 CPU that supports the Intel® EM64T.
2. Install a 64-bit operating system (Windows® XP Professional x64 Edi-
tion).
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.
A.2 Enhanced Intel SpeedStep® Technol-
ogy (EIST)
• The motherboard is fully compatible with Intel® Pentium® 4 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 5 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.
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.2.1 System requirements

Before using EIST, check your system if it meets the following requirements:
• Intel® Pentium® 4 processor with EIST support
• BIOS le with EIST support
• Operating system with EIST support (Windows® XP SP2/Linux 2.6 kernel
or later versions)
• 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 5 for details.
• Visit www.intel.com for more information on the EIST feature.