Memory Support
The
Note1: With Unbuffered ECC/Non ECC memory, maximum of 2 GB of memory is supported per DIMM slot.
Note 2: memory speed support is dependent on the type of CPU used on the board.
DIMM Module Population Configuration
For memory to work properly, follow the tables below for memory installation:
DIMM Population Table
DIMM | DIMMs | DIMM Type (Reg.= | Speeds (in MHz) | Ranks per DIMM |
Slots per | Populated | Registered) |
| (any combination; |
Channel | per Channel |
|
| SR=Single Rank, |
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| DR=Dual Rank, |
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| QR=Quad Rank) |
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2 | 1 | Reg. DDR3 ECC | 800,1066,1333 | SR or DR |
2 | 1 | Reg. DDR3 ECC | 800,1066 | QR |
2 | 2 | Reg. DDR3 ECC | 800,1066 | Mixing SR, DR |
2 | 2 | Reg. DDR3 ECC | 800 | Mixing SR, DR,QR |
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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, the amount of mem- ory that remains available for operational use will be reduced when 4 GB of RAM is used. The reduction in memory availability is disproportional.
Possible System Memory Allocation & Availability
System Device | Size | Physical Memory Available | |
|
| (4 GB Total System Memory) | |
Firmware Hub flash memory (System BIOS) | 1 MB | 3.99 GB | |
Local APIC | 4 KB | 3.99 GB | |
Area Reserved for the chipset | 2 MB | 3.99 GB | |
I/O APIC (4 Kbytes) | 4 KB | 3.99 GB | |
PCI Enumeration Area 1 | 256 MB | 3.76 GB | |
PCI Express (256 MB) | 256 MB | 3.51 GB | |
PCI Enumeration Area 2 (if needed) | 512 MB | 3.01 GB | |
boundary- |
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VGA Memory | 16 MB | 2.85 GB | |
TSEG | 1 MB | 2.84 GB | |
Memory available for the OS & other applications |
| 2.84 GB | |
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