MSI Z68A User Guide - Page 46

BIOS Setup ▶ EIST The Enhanced Intel SpeedStep technology allows you to set the performance level of the microprocessor whether the computer is running on battery or AC power. This field will appear after you installed the CPU which supports speedstep technology. ▶ DRAM Frequency This setting controls the frequency of memory. ▶ Extreme Memory Profile(X.M.P) This item is used to enable/disable the Intel Extreme Memory Profile (XMP). For further information please refer to Intel's official website. ▶ Adjusted DRAM Frequency It shows the adjusted DRAM frequency. Read-only. ▶ DRAM Timing Mode Select whether DRAM timing is controlled by the SPD (Serial Presence Detect) EEPROM on the DRAM module. Setting to [Auto] enables DRAM timings and the following "Advanced DRAM Configuration" sub-menu to be determined by BIOS based on the configurations on the SPD. Selecting [Link] or [Unlink] allows users to configure the DRAM timings and the following related "Advanced DRAM Configuration" sub-menu manually. ▶ Advanced DRAM Configuration Press to enter the sub-menu. ▶ Command Rate2 This setting controls the DRAM command rate. ▶ tCL 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. 3-8