2-6
PDSG4/PDSGE User's Manual
2-4 Installing DDR 2 Memory
Memory Module Installation (See Figure 2-2)
1. Insert each DDR 2 memory module vertically into its slot. Pay attention to the
notch along the bottom of the module to prevent inserting the module incor-
rectly. (See support information below.)
2. Gently press down on the memory module until it snaps into place.
Support
The PDSG4/PDSGE supports Dual channel, ECC unbuffered DDR 2
667/533/400 SDRAM. Both interleaved and non-interleaved memory are
supported, so you may populate any number of DIMM slots. (Populating
DIMM#1A,DIMM#1B, and/or DIMM#2A, DIMM#2B with memory modules
of the same size and of the same type will result in dual channel, two-way
interleaved memory which is faster than the single channel, non-interleaved
memory. When ECC memory is used, it may take 25-40 seconds for the VGA
to display.)
*Note 1
. Due to chipset limitation, 8GB Memory can only be supported by the fol-
lowing operating systems:
32-Bit: Windows 2000 Advanced Server & Windows 2003 Enterprise Edition;
64-Bit: Windows Server 2003 Standard/Enterprise/XP x64 Edition
*Note 2
. You may install a maximum of 2GB DIMMs on each slot; however, only
DDR 2 533 2GB density modules are available for this confi guration.
*Note 3.
Some old-version of DDR 2-667 may not match Intel's On-Die-Tempeature
requirement and will be automatically down-graded to run @ 533 MHz, If this occurs,
contact your memory vendor to check the ODT value.)
*Note 4.
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.
Exercise extreme care when installing or removing
memory modules to prevent any possible damage.
Possible System Memory Allocation & Availability (Total Physical Memory: 4 GB)
System Device
Size
Physical Memory Remaining (-Available)
Firmware Hub fl ash memory (Syste BIOS)
1 MB
3.99GB
Local APIC
4 KB
3.99GB
Area Reserved for the chipset
2 MB
3.99GB
I/O APIC (4 Kbytes)
4 KB
3.99GB
PCI Enumeration Area 1
256 MB
3.76GB
PCI Express (256 MB)
256 MB
3.51GB
PCI Enumeration Area 2 (if needed)
-Aligned on 256-MB boundary-
512 MB
3.01GB
VGA Memory
16 MB
2.85GB
TSEG
1 MB
2.84GB
Memory available for the OS & applications
2.84GB
