Intel KD875PBZLKPAK10 Product Specification - Page 112

Table 62., Chipset Configuration Submenu

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Intel Desktop Board D875PBZ Technical Product Specification Table 62. Chipset Configuration Submenu (continued) Feature Extended Configuration SDRAM Frequency (Note 1) SDRAM Timing Control (Note 1) CPC Override SDRAM RAS Active to Precharge (Note 4) SDRAM CAS# Latency (Note 4) SDRAM RAS# to CAS# Delay (Note 4) SDRAM RAS# Precharge (Note 4) Options Description • Default (default) Allows the setting of extended configuration options. • User Defined • Auto (default) Allows override of the detected memory frequency. • 266 MHz • 333 MHz (Note 2) • 400 MHz (Note 3) NOTE: If SDRAM Frequency is changed, you must reboot for the change to take effect. After changing this setting and rebooting, the System Memory Speed parameter in the Main menu will reflect the new value. • Auto (default) • Manual - Aggressive • Manual - User Defined 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. • Auto (default) Controls the CPC/1n rule mode. • Enabled • Disabled Enabled allows the DRAM controller to attempt chip select assertions in two consecutive common clocks. • 8 Corresponds to tRAS. • 7 • 6 (default) • 5 • 2.0 • 2.5 (default) Selects the number of clock cycles required to address a column in memory. • 3.0 • 4 Selects the number of clock cycles between • 3 addressing a row and addressing a column. • 2 (default) • 4 Selects the length of time required before accessing • 3 a new row. • 2 (default) Notes: 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 option is displayed only if the installed processor has an 800 MHz system bus. 4. This feature is displayed only if SDRAM Timing Control is set to Manual - User Defined. 112

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Intel Desktop Board D875PBZ Technical Product Specification
112
Table 62.
Chipset Configuration Submenu
(continued)
Feature
Options
Description
Extended Configuration
•
Default (default)
•
User Defined
Allows the setting of extended configuration options.
SDRAM Frequency
(Note 1)
•
Auto (default)
•
266 MHz
•
333 MHz
(Note 2)
•
400 MHz
(Note 3)
Allows override of the detected memory frequency.
NOTE:
If SDRAM Frequency is changed, you must
reboot for the change to take effect.
After changing
this setting and rebooting, the System Memory
Speed parameter in the Main menu will reflect the
new value.
SDRAM Timing Control
(Note 1)
•
Auto (default)
•
Manual
–
Aggressive
•
Manual
–
User Defined
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.
CPC Override
•
Auto (default)
•
Enabled
•
Disabled
Controls the CPC/1n rule mode.
Enabled
allows the DRAM controller to attempt chip
select assertions in two consecutive common clocks.
SDRAM RAS Active to
Precharge
(Note 4)
•
8
•
7
•
6 (default)
•
5
Corresponds to tRAS.
SDRAM CAS# Latency
(Note 4)
•
2.0
•
2.5 (default)
•
3.0
Selects the number of clock cycles required to
address a column in memory.
SDRAM RAS# to CAS#
Delay
(Note 4)
•
4
•
3
•
2 (default)
Selects the number of clock cycles between
addressing a row and addressing a column.
SDRAM RAS#
Precharge
(Note 4)
•
4
•
3
•
2 (default)
Selects the length of time required before accessing
a new row.
Notes:
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 option is displayed only if the installed processor has an 800 MHz system bus.
4.
This feature is displayed only if SDRAM Timing Control is set to Manual
–
User Defined.