User`s guide

5-8 NovaScale R422 Installation and User's Guide
5-6 Installing Memory
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)
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.)
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.
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 NovaScale R422 X7DBT/X7DBT-INF motherboard 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.
Optimized DIMM Population Confi gurations
Branch 0 Branch 1
Number of DIMMs Bank 1 Bank 2 Bank 3 Bank 4
(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
DIMM slot# specifi ed: DIMM slot to be populated; “---“: DIMM slot not to be populated.
Both FBD 533 MHz and 667 MHz DIMMs are supported; however, you need to use the
memory modules of the same speed and of the same type on a motherboard.
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.
For memory to work properly, you need to follow the restrictions listed above.
1.
2.
3.
i.
ii.
iii.
iv.
NOTE : Due to OS limitations, some operating systems may not show more than 4 GB
of memory.