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SuperWorkstation 7047A-73/7047A-T User's Manual
DIMM Population Table
DIMM
Slots per
Channel
DIMMs
Populated
per Channel
DIMM Type (Reg.=
Registered)
Speeds (in MHz) Ranks per DIMM
(any combination;
SR=Single Rank,
DR=Dual Rank,
QR=Quad Rank)
2 1 Reg. DDR3 ECC 800,1066,1333 SR, DR
2 1 Reg. DDR3 ECC 800,1066, QR
2 2 Reg. DDR3 ECC 800,1066,1333 SR, DR
2 2 Reg. DDR3 ECC 800,1066 SR, DR, QR
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 memory that
remains available for operational use will be reduced when 4 GB of RAM is used.
The reduction in memory availability is disproportional. (See the following Memory
Availability Table.)
Possible System Memory Allocation & Availability
System Device Size Physical Memory Remaining (with 4 GB of
system memory installed)
Firmware Hub fl ash 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)
-Aligned on 256-MB boundary-
512 MB 3.01 GB
VGA Memory 16 MB 2.85 GB
TSEG 1 MB 2.84 GB
Memory available for the OS & other
applications
2.84 GB