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X7DBT/X7DBT-INF/X7DGT/X7DGT-INF 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 (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. For optimal
performance, please install four modules of the same type and same speed
in Branch 0 and Branch 1 at a time (up to 8 modules maximum). (*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 X7DBT/X7DBT-INF/X7DGT/X7DGT-INF supports up to 32 GB fully buffered
(FBD) ECC DDR2 533/667 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.
*Note 1: Due to OS limitations, some operating systems may not show more than
4 GB of memory.
Optimized DIMM Population Configurations
Branch 0 Branch 1
Number of
DIMMs
Bank 1
(Channel 0)
Bank 2
(Channel 1)
Bank 3
(Channel 2)
Bank 4
(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. To optimize memory
performance, please populate 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. )