SUPER MICRO Computer X7DGU, X7DBU user manual Installing DIMMs, Dimm Installation, Memory Support

X7DBU/X7DGU User's Manual

2-3 Installing DIMMs

Note: Check the Supermicro web site for recommended memory modules.

CAUTION

Exercise extreme care when installing or removing DIMM modules to prevent any possible damage. Also note that the memory is interleaved to improve performance (see step 1).

DIMM Installation

1.Insert the desired number of DIMMs into the memory slots, starting with DIMM #1A. The memory scheme is interleaved so you must install two modules at a time, beginning with DIMM #1A, then DIMM #2A and so on. (*See the Memory Installation Table Below.)

2.Insert each DIMM module vertically into its slot. Pay attention to the notch along the bottom of the module to prevent inserting the DIMM module incorrectly.

3.Gently press down on the DIMM module until it snaps into place in the slot. Repeat for all modules (see step 1 above).

Memory Support

The X7DBU/X7DGU supports up to 32 GB fully buffered (FBD) ECC DDR2 667/533 in 8 DIMMs. Populating DIMM modules with pairs of memory modules of the same size and same type will result in Interleaved Memory which will increase

memory performance.

Optimized DIMM Population Configurations

	Branch 0				Branch 1
Number of	Bank 1		Bank 2		Bank 3		Bank 4
DIMMs	(Channel 0)		(Channel 1)		(Channel 2)		(Channel 3)
2 DIMMs	1A	---	2A	---	---	---	---	---
4 DIMMs	1A	---	2A	---	3A	---	4A	---
6 DIMMs	1A	1B	2A	2B	3A	---	4A	---
8 DIMMs	1A	1B	2A	2B	3A	3B	4A	4B

(*Notes: i. DIMM slot# specified: DIMM slot to be populated; “--

-“: DIMM slot not to be populated. ii. Both FBD 533 MHz and 667MHz DIMMs are supported; however, you need to use the memory modules of the same speed and of the same type on a motherboard. iii. Interleaved memory is supported when pairs of DIMM modules are installed. For best performance, please install memory modules in both Branch 0 and Branch 1. iv. For memory to work properly, you need to follow the restrictions listed above. )

Note 1: Due to OS limitations, some operating systems may not show more than 4 GB of memory.

Note 2: 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 Memory Availability Table on the next page for details.)

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