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ADDDC Sparing
Adaptive Double Device Data Correction (ADDDC) Sparing detects when the prede-
termined threshold for correctable errors is reached, copying the contents of the failing
DIMM to spare memory. The failing DIMM or memory rank will then be disabled. The
options are Disable and Enable.
Patrol Scrub
Patrol Scrub 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 feature is set to Enable, the IO hub will read and write back one
cache line every 16K cycles if there is no delay caused by internal processing. By us-
ing this method, roughly 64 GB of memory behind the IO hub will be scrubbed every
day. The options are Disable and Enable.
*If the feature above is set to Enable, Patrol Scrub Interval is available for con-
figuration:
Patrol Scrub Interval
This feature allows you to decide how many hours the system should wait before the
next complete patrol scrub is performed. Use the keyboard to enter a value from 0-24.
The default setting is 24.
IIO Configuration
EV DFX Features
When this feature is set to Enable, the EV_DFX Lock Bits that are located on a proces-
sor will always remain clear during electric tuning. The options are Disable and Enable.
CPU Configuration
CPU SLOT7 PCI-E 3.0 X8 Bifurcation
Use this feature to configure the PCIe port bifuraction setting for the specified PCIe
port. The options are x4x4 and x8.
CPU SLOT7 PCI-E 3.0 X8
Link Speed
Use this feature to select the link speed for this port. The options are Auto, Gen 1
(2.5 GT/s), Gen 2 (5GT/s), and Gen 3 (8GT/s).
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Chapter 4: BIOS
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