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X8DTG-QF User's Manual
Memory Support
The X8DTG-QF supports up to 192 GB* of Registered ECC or up to 48 GB of Unbuf-
fered ECC/Non-ECC DDR3 1333/1066/800 MHz Memory in 12 DIMMs. (*Refer to
our memory recommendation list posted on our website at www.supermicro.com.)
Note1:
For Unbuffered ECC/Non-ECC memory, maximum of 4 GB per
DIMM is supported.
Note 2:
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)
