BIOS Setup Program

Table 53. Chipset Configuration Submenu (continued)

Feature

CPC Override

SDRAM Timing Control

(Note 1)

SDRAM RAS Active to Precharge (Note 3)

SDRAM CAS# Latency

(Note 3)

SDRAM RAS# to CAS#

Delay (Note 3)

SDRAM RAS#

Precharge (Note 3)

Notes:

Options

Auto (default)

Enabled

Disabled

Auto (default)

Manual – Aggressive

Manual – User Defined

8

7

6 (default)

5

2.0

2.5 (default)

3.0

4

3 (default)

2

4

3 (default)

2

Description

Controls the CPC/1n rule mode.

Enabled allows the DRAM controller to attempt chip select assertions in two consecutive common clocks.

Auto = Timings will be programmed according to the memory detected.

Manual – Aggressive = Selects most aggressive user-defined timings.

Manual – User Defined = Allows manual override of detected SDRAM settings.

Corresponds to tRAS.

Selects the number of clock cycles required to address a column in memory.

Selects the number of clock cycles between addressing a row and addressing a column.

Selects the length of time required before accessing a new row.

1.This feature is displayed only if Extended Configuration is set to User Defined.

2.This option is displayed only if the installed processor has a 533 MHz system bus.

3.This feature is displayed only if SDRAM Timing Control is set to Manual – User Defined.

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Intel D865PCD specifications Options Auto default, Default Description