Manual - Xpress Platforms

BIOS Setup▶DRAM FrequencyThis item is used to adjust the DRAM frequency. Setting to [Auto], the system will detectthe DRAM Frequency automatically.▶Adjusted DRAM FrequencyIt shows the adjusted Memory frequency. Read-only.▶DRAM Timing ModeThis field has the capacity to automatically detect the DRAM timing.▶Advanced DRAM ConfigurationPress to enter the sub-menu.▶Command RateThis setting controls the DRAM command rate.▶tCLThis controls the CAS latency, which determines the timing delay (in clock cycles)before SDRAM starts a read command after receiving it.▶tRCDWhen DRAM is refreshed, both rows and columns are addressed separately. Thissetup item allows you to determine the timing of the transition from RAS (row addressstrobe) to CAS (column address strobe). The less the clock cycles, the faster theDRAM performance.▶tRPThis setting controls the number of cycles for Row Address Strobe (RAS) to beallowed to precharge. If insufficient time is allowed for the RAS to accumulate itscharge before DRAM refresh, refreshing may be incomplete and DRAM may failto retain data. This item applies only when synchronous DRAM is installed in thesystem.▶tRASThis setting determines the time RAS takes to read from and write to memory cell.▶tRTPTime interval between a read and a precharge command.3-12