Acer R910 Series manual Dimm population with sparing

160 Appendix B: Memory configuration options

DIMM population with sparing

The tables below list the suggested DDR2 DIMM module population for memory sparing configuration.

Population with one memory board

Memory board A		Memory board B	Memory board C	Memory board D	Total Memory
1A/1B	2A/2B	1A/1B 2A/2B	1A/1B 2A/2B	1A/1B 2A/2B	Physical	Detected
					memory by OS
2 x	2 x
512 MB	512 MB				2 GB	1 GB
(Sparing)
2 x 1 GB	2 x 1 GB				4 GB	2 GB
(Sparing)
2 x 2 GB	2 x 2 GB				8 GB	4 GB
(Sparing)
2 x 4 GB					8 GB	4 GB
(Sparing)*
2 x 4 GB	2 x 4 GB				16 GB	12 GB
(Sparing)*

*Only 4GB of memory installed in DIMM 1A/1B slots will be reserved as spare DIMMs, one rank from each dual-rank DIMM.

Population with two memory boards

Memory board A		Memory board B		Memory board C	Memory board D	Total Memory
1A/1B	2A/2B	1A/1B	2A/2B	1A/1B 2A/2B	1A/1B 2A/2B	Physical	Detected
						memory by OS
2 x	2 x	2 x	2 x
512 MB	512 MB	512 MB	512 MB			4 GB	2 GB
(Sparing)		(Sparing)
2 x 1 GB	2 x 1 GB	2 x 1 GB	2 x 1 GB			8 GB	4 GB
(Sparing)		(Sparing)
2 x 2 GB	2 x 2 GB	2 x 2 GB	2 x 2 GB			16 GB	8 GB
(Sparing)		(Sparing)
2 x 4 GB		2 x 4GB	2 x 4 GB			16 GB	8 GB
(Sparing)*		(Sparing)*
2 x 4 GB	2 x 4 GB	2 x 4GB	2 x 4 GB			32 GB	24 GB
(Sparing)*		(Sparing)*

*Only 4GB of memory installed in DIMM 1A/1B slots will be reserved as spare DIMMs, one rank from each dual-rank DIMM.