[. . . ] The Intel® EM64T feature allows your computer to run on 64-bit operating systems and access larger amounts of system memory for faster and more efficient computing. The motherboard is fully compatible with Intel® LGA 775 processors running on 32-bit operating systems. Using the Intel® EM64T feature To use the Intel® EM64T feature: 1. [. . . ] Install a 64-bit operating system (Windows® XP Professional x64 Edition or Windows® Server 2003 x64 Edition). Install the 64-bit drivers for the motherboard components and devices from the support CD. 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. Enhanced Intel SpeedStep® Technology (EIST) The Enhanced Intel SpeedStep® Technology (EIST) intelligently manages the CPU resources by automatically adjusting the CPU voltage and core frequency depending on the CPU loading and system speed/power requirement. System requirements · · · Intel® Pentium® 4 processor with EIST support BIOS file with EIST support Operating system with EIST support (Windows® XP SP2/Windows® Server 2003 SP1/Linux 2. 6 kernel or later versions) Using the EIST To use the EIST feature: 1. After you adjust the power scheme, the CPU internal frequency slightly decreases when the CPU loading is low. · The motherboard comes with a BIOS file that supports EM64T and EIST. You can download the latest BIOS file from the ASUS website (www. asus. com/support/download/) if you need to update the BIOS file. The screen displays and procedures may vary depending on the operating system. Visit www. intel. com for more information on the EM64T and EIST features. [. . . ] Visit www. intel. com for more information on the EM64T and EIST features. [. . . ]