2-8
X8DTT-H+/-HF+/-HEF+/-HIBXF+/-HIBQF+ User's Manual
Memory Support
The X8DTT-H+ Series motherboard supports up to 192 GB of Registered ECC or
48 GB of Unbuffered ECC/Non-ECC DDR3 1333 MHz/1066 MHz/800 MHz in 12
DIMMs. Please note that memory speed support depends on the type of CPU used
on the motherboard.
Memory Support for the Motherboard with the 5500 Processor(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
Note:
1066 RDIMMs will run at 800 MHz (-BIOS automatic downgrading)
UDIMM Population for the Motherboard w/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)
3
1
Unb. DDR3 ECC/Non-ECC
800,1066,1333
SR or DR
3
2
Unb. DDR3 ECC/Non-ECC
800,1066
Mixing SR, DR
Memory Support for the Motherboard with the 5600 Processor(s)
Installed
1.5V DIMMs
•
1.5V RDIMM Population for the Motherboard w/5600 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 (Note 1)
QR
3
2
Reg. DDR3 ECC
800,1066, 1333
Mixing SR, DR
3
2
Reg. DDR3 ECC
800 (Note 2)
Mixing SR, DR, QR
Note 1:
1333 MHz RDIMMs will run at 1066 MHz (-BIOS automatic downgrading).
Note 2:
1333/1066 MHz RDIMMs will run at 800 MHz (-BIOS automatic downgrading).
