MSI 975X PLATINUM User Guide - Page 66

BIOS Setup Important Even though the Dynamic Overclocking Technology is more stable than manual overclocking, basically, it is still risky. We suggest user to make sure that your CPU can afford to overclocking regularly first. If you find the PC appears to be unstable or reboot incidentally, it's better to disable the Dynamic Overclocking or to lower the level of overclocking options. By the way, if you need to conduct overclocking manually, you also need to disable the Dynamic OverClocking first. Memory Function Control Press and the following sub-menu appears. DRAM Timing Selectable Selects whether DRAM timing is controlled by the SPD (Serial Presence Detect) EEPROM on the DRAM module. Setting to [By SPD] enables the following fields automatically to be determined by BIOS based on the configurations on the SPD. Selecting [Manual] allows users to configure following fields manually. CAS Latency Time This controls the timing delay (in clock cycles) before SDRAM starts a read command after receiving it. Setting options: [3], [4], [5], [6], [Auto]. DRAM RAS# to CAS# Delay This field allows you to set the number of cycles for a timing delay between the CAS and RAS strobe signals, used when DRAM is written to, read from or refreshed. Fast speed offers faster performance while slow speed offers more stable performance. Setting options: [2], [3], [4], [5], [6], [Auto]. DRAM RAS# Precharge This item 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. Setting options: [2], [3], [4], [5], [6], [Auto]. Precharge Delay (tRAS) The field specifies the idle cycles before precharging an idle bank. Setting options: [4~15], [Auto] . 3-23