User manual CHAINTECH 7VIL4

[. . . ] 7VIL4 AMD Socket A VIA KT400A + VT8235 u-ATX Motherboard User's Guide Version 1. 0 Declaration of Conformity According to 47 CFR, Parts 2 and 15 of the FCC Rules The following designated product: EQUIPMENT: MAINBOARD MODEL NO. : 7VIL4 is a Class B digital device that complies with 47 CFR Parts 2 and 15 of the FCC Rules. This device must accept any interference received, including interference that may cause undesired operation. This declaration is given to the manufacturer: CHAINTECH-EXCEL COMPUTER INC. 7-1, Chung Shin Rd. , Tu Cheng, Taipei Hsien, Taiwan, ROC http://www. chaintech. com. tw Chaintech President: Simon Ho Signature: Federal Communications Commission Statement This device complies with FCC Rules Part 15. [. . . ] Enabling APIC mode will expand available IRQs resources for the system. MPS Version Control For OS This item allows you to select which MPS (Multi-Processor Specification) version is used for the operating system. You need to select the MPS version which is supported by your operating system. To find out which version to use, consult the vendor of your operating system. OS Select For DRAM > 64MB If your system's DRAM is larger than 64MB and you are running OS/2, select OS/2 as the item value. Otherwise, set the item value to Non-OS/2 for all other operating systems. (Self-Monitoring, Analysis and Reporting Technology) system that utilizes the internal hard disk drive monitoring technology. This parameter is normally set as Disabled because the resources used in the SMART monitoring feature may decrease the system performance. Video BIOS Shadow Enabling this function will allow the BIOS setting of the VGA card to be saved in RAM for better performances. Logo. 20 Chapter 3 Show POST CODE Enabling this function can show POST error code on the screen before proceeding to operating system. 3-3 Advanced Chipset Features By choosing the [Advanced Chipset Features] option from the CMOS Setup Utility menu (Figure 3-1), the screen below is displayed. This sample screen contains the manufacturer's default values for the motherboard. Figure 3-4 All of the above settings have been determined by the motherboard manufacturer and should not be changed unless you are absolutely sure of what you are doing. Explanation of the DRAM timing and chipset features setup is lengthy, highly technical and beyond the scope of this manual. Below are some brief descriptions of the functions in this setup menu. DRAM Clock/Drive Control 1. DRAM Clock This selecting option allows you to control the DRAM speed. DRAM Timing The function allows you to enable or disable the DRAM timing by SPD. It is recommended to keep the default setting for a stable system operation. DRAM Burst Length / DRAM Command Rate / Write Recovery Time / tWTR for DDR 400 only It is recommended to keep the default setting for a stable system operation. 21 Chapter 3 AGP & P2P Bridge Control 1. AGP Aperture Size This feature allows users to select the size of the AGP aperture. It also determines the maximum amount of system RAM that can be allocated to the graphics card for texture storage. The required AGP aperture size will become smaller as the graphics card's memory increases in size. But increase in size of the aperture does not correspond to increase in performance. [. . . ] When the Security Option function is set to Setup, a password is required to enter BIOS and change BIOS settings. When the Security Option function is set to System, a password is required to enter both BIOS and the computer's operating system (for example Windows 98) found on the boot drive. The third and fourth variables are user password and supervisor password selected in BIOS (Figure 3-1). The main purpose of separating user and supervisor is to allow only the supervisor to have control over the settings in BIOS. [. . . ]