User`s guide

Serverboard Manual
34
BIOS
Setup
Feature Options Description
Dram Bank
Interleave
Disabled
AUTO
Enable this item to increase memory speed. It interleaves memory blocks
across DRAM chip selects.
When enabled, separate memory banks are set for odd and even
addresses and the next byte of memory can be accessed while the current
byte is being refreshed.
BIOS will AUTO detect compatibility on each node.
Node Memory
Interleave
Disabled
AUTO
Interleave Memory Blocks across processor nodes.
BIOS will AUTO detect compatibility of memory system
ECC Enabled
Disabled
ECC Check/Correct Mode
This is a Global enable function for all blocks within the CPU core and North
Bridge. This option will display the "Dram ECC", "DCACHE ECC Scrub
CTL", "L2 ECC Scrub CTL", and "DRAM ECC Scrub CTL" options in this
menu when enabled. Enable only if the DIMMs are Registered ECC and
support parity/ECC checking.
Dram ECC Enabled
Disabled
If all memory in the system supports ECC (x72), enabling this will Initial
Scrub DRAM and enable system requests to Dram to be checked and/or
corrected.
This option only appears if the ECC option is enabled.
ECC Scrub
Redirection
Enabled
Disabled
Enable ECC Scrubber to correect errors detected in DRAM during normal
CPU requests (Foreground Scrubbing)
Chip-Kill Enabled
Disabled
Enable Chip-Kill ECC on Nodes with all x4 ECC capable DIMMs
DCACHE ECC
Scrub CTL
Disabled
40 ns
80 ns
160 ns
320 ns
640 ns
1.28 us
2.56 us
Sets the rate of Background Scrubbing for DCACHE Lines.
This option only appears if the ECC option is enabled.
L2 ECC Scrub
CTL
Disabled
40 ns
80 ns
160 ns
320 ns
640 ns
1.28 us
2.56 us
Sets the rate of Background Scrubbing for L2 CACHE Lines.
This option only appears if the ECC option is enabled.
DRAM ECC
Scrub CTL
Disabled
1.31 ms
2.62 ms
5.24 ms
10.49 ms
20.97 ms
42.0 ms
84.0 ms
Sets the rate of BACKGROUND Scrubbing for DRAM (in addition to normal
ECC Scrubbing from system requests).
Note: BACKGROUND agent works independently of CPU requests and bus
masters, but it can NOT be enabled without first enabling Dram ECC.
This option only appears if the ECC option is enabled.
Chipset Configuration SubMenu continued...
Use this table in configuring the system chipset features: