Lv-Dimm Support - Fujitsu D2799 Technical Manual

Mirrored Channel Mode
– Requires identical modules on the channels A & B (CPU 1) and on D & E
(CPU 2).
– Half of the capacity is used for the mirroring — only the half of the installed
main memory is available for the applications.
– Channel C (CPU 1) respectively channel F (CPU 2) are not available in this
mode.
Performance Channel Mode
– Requires identical modules on all channels of each bank per CPU.
Spare Channel Mode
– Requires identical modules on all channels of each bank per CPU.
– One third of the capacity is used as spare range — this means the main
memory for the applications is reduced to two third.
3.2.3

LV-DIMM support

LV-DIMMs will be supplied with 1.35 V instead of the 1.5 V of the NV-DIMMs
(normal voltage DIMMs).
Anyway LV-DIMMs can also be operated with 1.5 V so that mixing of LV-DIMMs
and NV-DIMMs is possible. In this case all DIMMs will be operated with 1.5 V.
When using two LV-DIMMs 1333 MHz per channel the operating voltage
respective speed depends on the BIOS setup memory settings "Auto" /
"Energy" / "Performance":
"Auto" speed is set to 1066 MHz; operating voltage is set to 1.35 V
"Energy" speed is set to 800 MHz; operating voltage is set to 1.35 V
"Performance" speed is set to 1333 MHz; operating voltage is set to 1.5 V
The speed and operating voltage settings apply to all six sockets of one CPU in
common.
D2799 (TX200 S6)
Technical Manual
Main memory
25