MSI X58Pro-E User Guide - Page 64

▍ BIOS Setup ▶ Advance DRAM Configuration Press to enter the sub-menu and the following screen appears. ▶ 1N/2N Memory Timing This item controls the SDRAM command rate. Select [1N] makes SDRAM signal controller to run at 1N (N=clock cycles) rate. Selecting [2N] makes SDRAM signal controller run at 2N rate. ▶ CAS# Latency (CL) This controls the CAS latency, which determines the timing delay (in clock cycles) before SDRAM starts a read command after receiving it. ▶ tRCD When DRAM is refreshed, both rows and columns are addressed separately. This setup item allows you to determine the timing of the transition from RAS (row address strobe) to CAS (column address strobe). The less the clock cycles, the faster the DRAM performance. ▶ tRP 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, refresh may be incomplete and DRAM may fail to retain data. This item applies only when synchronous DRAM is installed in the system. ▶ tRAS This setting determines the time RAS takes to read from and write to memory cell. ▶ Advanced Memory Setting Setting to [Auto] enables DRAM timings automatically to be determined by BIOS based on the configurations on the SPD (Serial Presence Detect) EEPROM on the DRAM module. ▶ Extreme Memory Profile This item is used to enable/disable the Intel Extreme Memory Profile (XMP). For further information please refer to Intel's official website. ▶ Memory Ratio This item allows you to set the memory multiplier. ▶ Adjusted DRAM Frequency (MHz) It shows the adjusted Memory frequency. Read-only. ▶ ClockGen Tuner Press to enter the sub-menu and the following screen appears. 3-22