Chapter 4: AMI BIOS
4-13
MMIO High
Use this feature to select the high memory size according to memory-address
mapping for the IO hub. The options are
Auto
, 256MB, 512MB, 1024MB, 2048MB,
4096MB, and 8192MB.
CKE Power Down
Select Enabled to enable CKE Power Down support which controls the low power
mode for RAM in the active power standby mode. The options are Disabled and
Enabled
.
ECC (Error Correctable Correction) Support
Select Enabled to enable ECC support. The options are Disabled and
Enabled
.
Faulty Part Tracking
Select Enabled to support faulty part tracking for the system to keep track of faulty
memory parts. The options are
Disabled
and Enabled.
If Faulty Part Tracking is set to Enabled, the item below is available for con-
figuration:
On Correctable Faulty Part
Use this feature to set the system to halt or continue on a correctable faulty memory
part. The options are
Halt
and Continue.
Patrol Scrub Enable
Patrol Scrubbing is a process that allows the CPU to correct correctable memory
errors detected on a memory module and send the correction to the requestor
(the original source). When this item is set to Enabled, North Bridge will read and
write back one cache line every 16K cycles, if there is no delay caused by internal
processing. By using this method, roughly 64 GB of memory behind North Bridge
will be scrubbed every day. The options are Disabled and
Enabled
.
Patrol Scrub Period
Use this item to specify how often Patrol Scrubbing should be performed. Select 24
hours to allow Patrol Scrubbing to be performed every 24 hours. The options are
24 hours,
10 hours, 4 hours, and 1 hour.
Demand Scrub Enable
Demand Scrubbing is a process that allows the CPU to correct correctable memory
errors found on a memory module. When the CPU or I/O issues a demand-read
command, and the read data from memory turns out to be a correctable error, the
error will be corrected and sent to the requestor (the original source). Memory will
be updated at the same time. Select Enabled to use Demand Scrubbing for ECC
memory correction. The options are
Disabled and
Enabled
.
