MSI KT4V User Guide - Page 61

BIOS Setup Disable the function if 16MB SDRAM is installed. Settings: Disabled, 2-Way and 4-Way. DDR400 tWRT Timing This controls the timing delay (in clock cycles) before DDR400 starts a write command after receiving it. Settings: 1T, 2T, 3T. 3T increases the delay time while 1T provides the least timing delay. This option is effective only if DDR400 is running. SDRAM Burst Length This setting allows you to set the size of Burst-Length for DRAM. Bursting feature is a technique that DRAM itself predicts the address of the next memory location to be accessed after the first address is accessed. To use the feature, you need to define the burst length, which is the actual length of burst plus the starting address and allows internal address counter to properly generate the next memory location. The bigger the size, the faster the DRAM performance. Settings: 4 QW, 8 QW. SDRAM 1T Command This setting controls the SDRAM command rate. Selecting Enabled allows SDRAM signal controller to run at 1T (T=clock cycles) rate. Selecting Disabled makes SDRAM signal controller run at 2T rate. 1T is faster than 2T. Setting options: Disabled, Enabled. Fast Command This item controls the internal timing of CPU. Selecting Ultra allows CPU to handle data/instructions at the fastest speed. Fast enables CPU to handle at a faster speed, while Normal let CPU handle them at the slowest rate. Fast R-2-R Turnaround Burst read operation can be interrupted by new read of any bank. Random column access is allowed. READ to READ interval is minimum 1 CLK. Selecting Enabled to shorten the turnaround interval to improve the performance. Setting options: Disabled, Enabled. 3-15