Colorful iGame Z390 Vulcan X, Руководство пользователя

Страница: 75 / 81

data at the same bank. The shorter the set period, the faster the DRAM
will run.
‰
ROW Precharge Time (tRP)
This project is used to control how long after the Precharge command is
sent out by SDRAM, the command must not be sent out again. It is
recommended that you use default values to keep the system stable.
Options: [2Clocks] [3Clocks] [4 Clocks] [5 Clocks] [6 Clocks].
‰ Min Active RAS (tRAS) (SDRAM memory precharge delay)
This minimum value of R A S that controls the number of memory cycles
in S D R A M.
‰ Read to Precharge (tRTP)
Select precharge time.
‰
Row Cycle (tRC)
TRC stands for "SDRAM row cycle time," which is the minimum number of
clock cycles required for the entire process, including the pre-charge to
activation of the row cell.The formula is: row cycle time (tRC) = minimum
row active time (tRAS) + row precharge time (tRP). Therefore, before
setting this parameter, you should understand your tRAS and tRP values. If
the tRC takes too long, performance is degraded by waiting for
unnecessary delays to activate new addresses after completing the entire
clock cycle. Then once the value is set too small, the new cycle can be
initialized before the active row cell is fully charged.
‰
Write Recover Time (TWR)
Select the write reply time after DRAM logs in to the last write, that is, the
pre-charge time after the last write.
‰
RAS/RAS Delay (TRRD)
TRRD represents the "delay of row element to row element". This value
also indicates the time interval between sending activation instructions (i.e.
REF instructions) twice to the same row unit in the same bank. The smaller
the tRRD, the better. The lower latency means that the next bank can be
activated faster and read and write. However, due to the need for a
certain amount of data, too short delay will cause continuous data
expansion. For desktop computers, it is recommended that the TRRD
67
ＢＩＯＳ Ｓｅｔｔｉｎｇ