Artesyn ATCA-7470 Installation and Use (October 2014) - Manual (Page 101)

BIOS
ATCA-7470 Installation and Use (6806800P15K) 101
This configuration is set when BIOS defaults are loaded.
For other applications it might be better to set different values, especially when power savings
are desired.
4.7.8 Memory Configuration
The ATCA-7470 supports three different memory RAS (Reliability, Availability, and
Serviceability) modes: Independent Channel Mode, Mirrored Channel Mode, and Lockstep
Channel Mode.
4.7.8.1 Independent Channel Mode
In independent mode, all four channels are operating independently. The ECC code appears in
each independent channel. Failure of the DRAM can be corrected. The correction capabilities in
independent mode are:
 Correction of any x4 DRAM device failure.
 Detection of 99.986% of all single bit failures that occur in addition to an x4 DRAM failure.
 Detection of any 2-bit uncorrectable errors.
4.7.8.2 Mirrored Channel Mode
The Integrated Memory Controller supports mirroring across channels. DIMM organization in
each slot of one channel must be identical to the DIMM in the corresponding slot of the other
channel. When mirroring is enabled, the memory image in Channel 0 is maintained similar to
Channel 1. DIMMs and Channel 2 is maintained to Channel3 DIMMs. Uncorrectable errors are
logged and signaled as correctable, but change the channel state to "Disabled", and the
working partner to "Redundancy Loss".
Intel (R) SpeedStep(tm) Disabled
C-States Enabled
C3-State Disabled
C6-State Disabled
Table 4-16 CPU Performance Settings
Parameters Settings