Service Guide

BIOS Setup Utilities
Intel
®
Server System P4000IP and Intel
®
Workstation System P4000CR Service Guide 129
Option Values:
Auto
800
1066
1333
1600
Help Text: Force specific Memory Operating Speed or use Auto setting.
Comments: Allows the user to select a specific speed at which memory will operate. Only
speeds that are legitimate are available, that is, the user can only specify speeds less that or
equal to the auto-selected Memory Operating Speed. The default
Auto
setting will select the
highest achievable Memory Operating Speed consistent with the DIMMs and processors
installed.
1600 MT/s memory speed is available only on certain models.
6. Patrol Scrub
Option Values:
Enabled
Disabled
Help Text:
When enabled, performs periodic checks on memory cells and proactively walks
through populated memory space, to seek and correct soft ECC errors.
Comments: When enabled, Patrol Scrub is initialized to read through all of memory in a 24-
hour period, correcting any Correctable ECC Errors it encounters by writing back the
corrected data to memory.
7. Demand Scrub
Option Values:
Enabled
Disabled
Help Text:
When enabled, executes when an ECC error is encountered during a normal
read/write of data and corrects that data.
Comments: When enabled, Demand Scrub automatically corrects a Correctable ECC Error
encountered during a fetch from memory by writing back the corrected data to memory.
8. Correctable Error Threshold