Acer AT150 F1 - Manual (Page 70)

3 System upgrades 58
Memory identification
Generally, there are some memory information printed on the label of
the DIMM module. Different vendors may have different formats but
the convention is usually like this:
Item Description
Density 1 GB, 2 GB, 4 GB, 8 GB.
• Intel Xeon 5500 series processor supports DIMM
organized by 1Gb or 2Gb DRAM chips.
• Intel Xeon 5600 series processor supports DIMM
organized by 1Gb, 2Gb or 4Gb DRAM chips.
Rank 1R = Single Rank
2R = Dual Rank
4R = Quad Rank
Note: If quad rank DIMM is used, a maximum of only two
DIMMs per channel can be supported.
Bit
Organization This platform supports x4 and x8.
Note: It is not recommended to mix DIMMs with different
ranks in one system.
Speed PC3 - 6400 => DDR3- 800
PC3 - 8500 => DDR3- 1066
PC3 - 10600 => DDR3- 1333
PC3 - 12800 => DDR3- 1600
Density
Rank
Bit organization
Speed