ASRock Fatal1ty B150 Gaming K4 User Manual - Page 57
Refresh Cycle Time tRFC, RAS# Active Time tRAS
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Fatal1ty B150 Gaming K4 Series DRAM Frequency If [Auto] is selected, the motherboard will detect the memory module(s) inserted and assign the appropriate frequency automatically. DRAM Frequency OC Preset If the DRAM frequency is selected, the corresponding DRAM and BCLK frequency for overclocking will be set. Primary Timing CAS# Latency (tCL) The time between sending a column address to the memory and the beginning of the data in response. RAS# to CAS# Delay and Row Precharge (tRCDtRP) O RAS# to CAS# Delay : The number of clock cycles required between the opening of a row of memory and accessing columns within it. Row Precharge: The number of clock cycles required between the issuing of the precharge command and opening the next row. RAS# Active Time (tRAS) The number of clock cycles required between a bank active command and issuing the precharge command. Command Rate (CR) The delay between when a memory chip is selected and when the first active command can be issued. Secondary Timing Write Recovery Time (tWR) The amount of delay that must elapse after the completion of a valid write operation, before an active bank can be precharged. Refresh Cycle Time (tRFC) The number of clocks from a Refresh command until the first Activate command to the same rank. 49 English