SUPER MICRO Computer X7DCL-i Memory Support, Dimm 1A Dimm 2A, Dimm 1A Dimm 1B Dimm 2A Dimm 2B

X7DCL-3/X7DCL-i User's Manual

Memory Support

The X7DCL-3/X7DCL-i supports up to 48 GB Single-Rank/Dual Rank, Registered ECC DDR2 667/533 in 6 DIMMs (The amount and type of memory supported is dependent on the PCB revision. See Note 1 Below). Populating DIMM slots with pairs of memory modules of the same size and same type will result in Inter- leaved Memory which will improve memory performance.

Note 1: For the PCB Rev. 1.1 motherboard, Slots 1A and 2A support Dual-Rank modules; however, Slots 1B, 2B, 1C and 2C support Single-Rank memory only (Maximum of 32 GB). The PCB Rev. 1.1a board supports 6 Dual-Rank or 6 Single- Rank modules (Maximum of 48 GB).

Optimized DIMM Population Configurations

No. of		Channel 0			Channel 1
DIMMs
2DIMMs	DIMM 1A	------	------	DIMM 2A	------	------
4DIMMs	DIMM 1A	DIMM 1B	------	DIMM 2A	DIMM 2B	------
6DIMMs	DIMM 1A	DIMM 1B	DIMM 1C	DIMM 2A	DIMM 2B	DIMM 2C

(Notes: i. DIMM slot# specified: DIMM slot to be populated; “---“: DIMM slot not to be populated. ii. Both Registered ECC DDR2 667MHz and 533 MHz DIMMs are supported; however, you need to use the memory modules of the same speed and of the same type on a motherboard. iii. For memory to work properly, you need to follow the restrictions listed above. )

Note 2: Due to OS limitations, some operating systems may not show more than 4 GB of memory.

Note 3: Due to memory allocation to system devices, memory remaining available for operational use will be reduced when 4 GB of RAM is used. The reduction in memory availability is disproportional. (Refer to the following Memory Availability Table for details. For Microsoft Windows users: Microsoft implemented a design change in Windows XP with Service Pack 2 (SP2) and Windows Vista. This change is specific to the Physical Address Extension (PAE) mode behavior which improves driver compatibility. For more information, please read the following article at Micro- soft’s Knowledge Base website at: http://support.microsoft.com/kb/888137.

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