Nvidia 680i manual Expert

Configuring the BIOS

➢Expert

Use the Page Up and Page Down keys to select Expert. When Expert is selected, all timing categories are enabled for manual input. Note that you should set the value to Optimal to use the manufacturers’ recommended values.

➢tCL: CAS# latency (options are 1 through 6).

➢tRDC: RAS#-to-CAS# Delay for Read/Write commands to the same bank (options are 1 through 7).

➢tRP: Row Precharge time. This is the Precharge-to-Active or Auto-to-Refresh of the same bank (options are 1 through 7).

➢tRAS: This is the minimum RAS# active time (options are 1 through 31).

➢Command Per Clock: This is the command timing setting on a per clock unit basis (options are 1T and 2T).

➢tRRD: RAS#-to-RAS# delay of different banks (options are 1 through 15).

➢tRC: RAS#-to-RAS# or auto refresh time of the same bank (options are 1 through 31).

➢tWR: The Write recovery time (options are 2 through 7).

➢tWTR: This is the minimum write-to-read delay with the same chip selected (options are 1 through 10).

➢tREF: This is the DRAM refresh rate (options are Auto, 7.8uS, and 3.9uS).

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