MSI 915GM-FR User Manual - Page 47

M S-7033 M -ATX M ainboard DRAM RAS# Precharge (tRP) W hen the DRAM Timing Control is set to [Manual], this field is adjustable. This setting controls the number of cycles for Row Address Strobe (RAS) to be allowed to precharge. If insufficient time is allowed for the RAS to accumulate its charge before DRAM refresh, refreshing may be incomplete and DRAM may fail to retain data. This item applies only when synchronous DRAM is installed in the system. Setting options: [2T] to [5T]. Precharge dealy (tRAS) W hen the DRAM Timing Control is set to [Manual], this field is adjustable. This setting determines the time RAS takes to read from and write to a memory cell. Setting options: [4T] to [9T]. Adjust DDR Memory Frequency W henthe DRAM Timing Control is set to [Manual], user can place an artificial memory clock limit on the system. Please note that memory is prevented from running faster than this frequency. Setting options: [Auto], [333 MHz], [400 MHz], [533 MHz]. System BIOS Cacheable Selecting [Enabled] allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result. Setting options: [Enabled], [Disabled]. Video BIOS Cacheable Selecting [Enabled] allows caching of the video memory (RAM) at A0000h to AFFFFh, resulting in better video performance. However, if any program writes to this memory area, a memory access error may result. Setting options: [Disabled], [Enabled]. Memory Hole In order to improve performance, certain space in memory can be reserved for ISA peripherals. This memory must be mapped into the memory space below 16MB. W hen this area is reserved, it cannot be cached. Settings: [Disabled], [15MB-16MB]. PCI Express Port Func Press and the following sub-menu appears: 3-12