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Memory Support
The X8DAH+/X8DAH+F supports up to 144 GB Registered ECC DDR3-
1333/1066/800 MHz registered ECC SDRAM in 18 DIMM slots. DIMM sizes of 8
GB, 4 GB, 2 GB and 1 GB are supported.
Populating DIMMs
Follow the tables below when installing memory.
Populating DIMMs for Optimal Performance
For One CPU (CPU1) Installed (Populate the CPU1 DIMM slots)
CPU1: Branch 0
3 DIMMs
1A
6 DIMMs
1A
1B
9 DIMMs
1A
1B
Populating DIMMs for Optimal Performance
For One CPU (CPU2) Installed (Populate the CPU2 DIMM slots)
CPU2: Branch 0
3 DIMMs
1A
6 DIMMs
1A
1B
9 DIMMs
1A
1B
Populating DIMMs for Optimal Performance
CPU1 DIMMs
Branch 0
Branch 1
6
1A
2A
DIMMs
12
1A
1B
2A
DIMMs
18
1A
1B
1C
2A
DIMMs
DIMM
DIMMs
Slots per
Populated
Channel
per Channel
3
1
3
1
3
2
3
2
3
3
Chapter 5: Advanced Serverboard Setup
CPU1: Branch 1
2A
2A
2B
1C
2A
2B
CPU2: Branch 1
2A
2A
2B
1C
2A
2B
For Two CPUs Installed
Branch 2
Branch 0
3A
1A
2B
3A
3B
1A
2B
2C
3A
3B
3C
1A
Memory Population Table
DIMM Type (Reg.=
Speeds (in MHz)
Registered)
Reg. DDR3 ECC
800,1066,1333
Reg. DDR3 ECC
800,1066,
Reg. DDR3 ECC
800,1066
Reg. DDR3 ECC
800
Reg. DDR3 ECC
800
5-9
CPU1: Branch 2
3A
3A
3B
2C
3A
3B
CPU2: Branch 2
3A
3A
3B
2C
3A
3B
CPU2 DIMMs
Branch 1
Branch 2
2A
3A
1B
2A
2B
3A
1B
1C
2A
2B
2C
3A
Ranks per DIMM
(any combination;
SR=Single Rank,
DR=Dual Rank,
QR=Quad Rank)
SR, DR
QR
SR, DR
SR, DR, QR
SR, DR
3C
3C
3B
3B
3C
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