X7DB8/X7DBE 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. (*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 16 GB (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
| Branch0 |
|
|
| Branch1 |
|
|
|
| ||||
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. To optimize memory performance, please install pairs of DIMMs in both Branch 0 and Branch 1. iv. For memory to work properly, you need to follow the restrictions listed above. )
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 following Memory Availability Table for details.
