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X7DB8+/X7DBE+ User's Manual
2-3
Installing DIMMs
Note: Check the Super Micro 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 four modules at a
time, beginning with DIMM #1A, DIMM #2A, DIMM #3A, then DIMM #4A and so
on. For optimal memory performance, please install four modules at a time with
the maximum of 16 modules. (*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 X7DB8+/X7DBE+ supports up to 32 GB (64 GB) fully buffered (FBD) ECC
DDR 2 533/667 in 16 DIMMs. Populating DIMM modules with pairs of memory
modules that are of the same size and same type in both Branch 0 and Branch
1 will result in interleaved memory. (See the table below.)
*Note 1: Due to OS limitations, some operating systems may not show more than
4 GB of memory.
DIMM Module Population Confi guration
To optimize memory support, follow the table below for memory installation:
Branch 0
Number of
Bank 1
DIMMs
(Channel 0)
2 DIMMs
1A ---
4 DIMMs
1A ---
8 DIMMs
1A 1B ---
12 DIMMs
1A 1B 1C ---
16 DIMMs
1A 1B 1C 1D 2A 2B 2C 2D 3A 3B 3C 3D 4A 4B 4C 4D
(*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 optimal memory performance, please install pairs of memory modules
in both Branch 0 and Branch 1. iv. For memory to work properly, you need to
follow the restrictions listed above. )
CAUTION
Optimized DIMM Population Configurations
Bank 2
(Channel 1)
2A ---
---
---
---
---
2A ---
---
---
---
---
2A 2B ---
---
---
2A 2B 2C ---
2-6
Branch 1
Bank 3
Bank 4
(Channel 2)
(Channel 3)
---
---
---
---
---
---
3A ---
4A ---
---
---
3A 3B ---
4A 4B ---
---
3A 3B 3C ---
4A 4B 4C ---
---
---
---
---
---
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