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X8DAH+/X8DAH+-F/X8DAH+(-F)-LR User's Manual

2. For PCB Rev. 2.0 or Newer Boards

For memory to work properly, follow the tables below for memory installation:

Memory Population for Optimal Performance for PCB Rev. 2.0 or Newer

Boards with One CPU Installed in CPU Socket 1

P1-DIMMs To Populate P1-DIMMs
Branch 0 Branch 1 Branch 2
3 DIMMs P1-1A P1-2A P1-3A
6 DIMMs P1-1A P1-1B P1-2A P1-2B P1-3A P1-3B
9 DIMMs
(RDIMMs only) (Note)
P1-1A P1-1B P1-1C P1-2A P1-2B P1-2C P1-3A P1-3B P1-3C
Note: Max. of 6 UDIMM modules are supported by a CPU.

Memory Population for Optimal Performance for PCB Rev. 2.0 or Newer

Boards with One CPU Installed in CPU Socket 2

P2-DIMMs To Populate P2-DIMMs
Branch 0 Branch 1 Branch 2
3 DIMMs P2-1A P2-2A P2-3A
6 DIMMs P2-1A P2-1B P2-2A P2-2B P2-3A P2-3B
9 DIMMs
(RDIMMs only (Note)
P2-1A P2-1B P2-1C P2-2A P2-2B P2-2C P2-3A P2-3B P2-3C
Note: Max. of 6 UDIMM modules are supported by a CPU.

Memory Population for Optimal Performance for PCB Rev. 2.0 or Newer

Boards with Two CPUs Installed in CPU Sockets 1 & 2

CPU 1 (To Populate P1-DIMMs) CPU 2 (To Populate P2-DIMMs)
Branch 0 Branch 1 Branch 2 Branch 0 Branch 1 Branch 2
6 DIMMs P1-1A P1-2A P1-3A P2-1A P2-2A P2-3A
12 DIMMs P1-1A/1B P1-2A/2B P1-3A/3B P2-1A/1B P2-2A/2B P2-3A/3B
18 DIMMs
(For RDIMMs only) (Note)
P1-
1A/1B/1C
P1-
2A/2B/2C
P1-
3A/3B/3C
P2-
1A/1B/1C
P2-
2A/2B/2C
P2-
3A/3B/3C
Note: Max. of 6 UDIMM modules are supported by a CPU.
Memory Support for the Motherboard w/5500 CPU(s) Installed

RDIMM Population for the Motherboard w/5500 Processors Installed

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)
3 1 Reg. DDR3 ECC 800,1066,1333 SR or DR
3 1 Reg. DDR3 ECC 800,1066 QR
3 2 Reg. DDR3 ECC 800,1066 Mixing SR, DR
3 2 Reg. DDR3 ECC 800 (Note) Mixing SR, DR, QR
3 3 Reg. DDR3 ECC 800 (Note ) Mixing SR, DR
Note: 1066 RDIMMs will run at 800 MHz (-BIOS automatic downgrading)