Common Options : 2T, 3T

Details

Like SDRAM Trp Timing Value, this feature controls the memory bank's precharge time (tRP). This constitutes the time it takes for the Precharge command to complete and the row to be available for activation. Hence the name DRAM PreChrg to Act CMD which is short for DRAM Precharge Command to Activate Command.

Now, tRP is important because it determines how soon a row can be activated after a Precharge command has been issued. If it's set for a long time, that will unnecessarily reduce performance by preventing the row from being activated earlier. But if you set it for too short a period, the row may not be sufficiently precharged and that may cause a loss of data when the memory controller attempts to read from that row.

For optimal performance, use the lowest value you can. But if you start getting memory errors or system crashes, increase the value. Note that because the bank cycle time (tRC) = minimum row active time (tRAS) + row precharge time (tRP), you should take into account the values for tRC and tRAS before selecting the tRP value.