[. . . ] Copyright and Warranty Notice The information in this document is subject to change without notice and does not represent a commitment on part of the vendor, who assumes no liability or responsibility for any errors that may appear in this manual. No warranty or representation, either expressed or implied, is made with respect to the quality, accuracy or fitness for any particular part of this document. In no event shall the manufacturer be liable for direct, indirect, special, incidental or consequential damages arising from any defect or error in this manual or product. Product names appearing in this manual are for identification purpose only and trademarks and product names or brand names appearing in this document are the property of their respective owners. [. . . ] This item will effect the memory address read/write speed, MA 1T will be the fast selection. This item can adjust the bus read/write speed between the northbridge and memory. This item controls the prefetch caching for PCI slave control, Select Enable will increase the system performance. If you use the older AGP adapter that does not support AGP 4X mode, you need to set this item to 2X. You can check your AGP adapter user's manual to know what kind of AGP mode it can support. If your AGP adapter can support this function, then you can choose Enable. Enabling this item can improve your system performance, but it may also decrease system compatibility. User's Manual 3-16 Chapter 3 AGP Aperture Size: Up to seven options are available: 4MB ) 8MB ) 16MB ) 32MB ) 64MB ) 128 MB ) 256 MB. This option specifies the amount of system memory that can be used by the AGP device. The aperture is a portion of the PCI memory address range dedicated for graphics memory address space. Host cycles that hit the aperture range are forwarded to the AGP without any translation. When you set it to Disable, the system will use the default six PCI IRQs for all devices, and will not increase the number of PCI IRQs. MPS Revision: This option specifies which version of MPS the motherboard will use. If you use an older operating system for dual processor executing, please set this option to 1. 1. IDE Access Interface: Two options are available: Fast Embedded Bus or PCI Bus. This item can let you select to use the legacy PCI IDE access interface, or use the SiS MuTIOL® Media I/O bus to transfer data. Select the Fast Embedded Bus should can get the better system performance. USB0 Access Interface: Two options are available: Fast Embedded Bus or PCI Bus. This item can let you select to use the legacy PCI USB0 access interface, or use the SiS MuTIOL® Media I/O bus to transfer data. Select the Fast Embedded Bus should can get the better system performance. USB1 Access Interface: Two options are available: Fast Embedded Bus or PCI Bus. This item can let you select to use the legacy PCI USB1 access interface, or use the SiS MuTIOL® Media I/O bus to transfer data. Select the Fast Embedded Bus should can get the better system performance. SX7-533 Introducing the BIOS 3-17 3-5. [. . . ] Your ABIT authorized distributor should be able to provide the fastest solution to your technical problem. We sell our products through distributors who sell to resellers and stores. Your reseller should be very familiar with your system configuration and should be able to solve your problem much more efficiently than we could. After all, your reseller regards you as an important User's Manual G-2 Appendix G customer who may purchase more products and who can urge your friends to buy from him or her as well. [. . . ]