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X7DBR-8/X7DBR-i User's Manual
2-3
Installing DIMMs
Note: Check the Supermicro web site for recommended memory modules.
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 (See Figure 2-2)
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 X7DBR-8/X7DBR-i 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
Number of
Bank 1
DIMMs
(Channel 0)
2 DIMMs
1A ---
---
4 DIMMs
1A ---
---
6 DIMMs
1A 1B ---
8 DIMMs
1A 1B ---
(*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 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.)
CAUTION
Branch 1
Bank 2
Bank 3
(Channel 1)
(Channel 2)
---
2A ---
---
---
---
---
2A ---
---
---
3A ---
---
2A 2B ---
---
3A ---
---
2A 2B ---
---
3A 3B ---
2-6
Bank 4
(Channel 3)
---
---
---
---
---
---
---
---
4A ---
---
---
---
4A ---
---
---
4A 4B ---
---
---
---
---
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