User`s manual

2-8
X8DTT/-F/-IBX/-IBXF/-IBQ/-IBQF User's Manual
Memory Support
This motherboard supports up to 192 GB of Registered ECC or 48 GB of Unbuffered
ECC/Non-ECC DDR3 1333/1066/800 MHz Memory in 12 DIMMs. Also, memory
speed support is dependent on the type of CPU used on the board.
DIMM Module Population Confi guration
For memory to work properly, follow the tables below for memory installation:
Memory Support for the Motherboard w/5500 Processors Installed
RDIMM Population for the Motherboard with 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)
2 1 Reg. DDR3 ECC 800,1066,1333 SR or DR
2 1 Reg. DDR3 ECC 800,1066 (Note 1) QR
2 2 Reg. DDR3 ECC 800,1066 (Note 1) Mixing SR, DR
2 2 Reg. DDR3 ECC 800 (Note 2) Mixing SR, DR, QR
Note 1: 1333 RDIMMs will run at 1066 MHz (-BIOS automatic downgrading).
Note 2: 1333/1066 RDIMMs will run at 800 MHz (-BIOS automatic downgrading).
UDIMM Population for the Motherboard with 5500 Processors Installed
DIMM
Slots per
Channel
DIMMs
Populated
per Channel
DIMM Type (Unb.=
Unbuffered)
Speeds (in MHz) Ranks per DIMM
(any combination;
SR=Single Rank,
DR=Dual Rank,
QR=Quad Rank)
2 1 Unb. DDR3 ECC/Non-ECC 800,1066,1333 SR or DR
2 2 Unb. DDR3 ECC/Non-ECC 800,1066 (Note) Mixing SR, DR
Note: 1333 UDIMMs will run at 800 MHz (-BIOS automatic downgrading)