User`s manual

Chapter 5: Advanced Motherboard Setup
5-11
Memory Population Guidelines
Please follow the tables below when populating the X8SiT-HF.
DDR3 ECC UDIMM Memory
DIMM Slots
per Channel
DIMMs
Populated
per Channel
DIMM Type POR Speeds Ranks per DIMM
(any combination)
3 1 Unbuffered
DDR3 ECC
1066, 1333 Single Rank, Dual
Rank
3 2 Unbuffered
DDR3 ECC
1066, 1333 Single Rank, Dual
Rank
3 3 N/A Not Supported Single Rank, Dual
Rank
DDR3 ECC RDIMM Memory
DIMM Slots
per Channel
DIMMs
Populated
per Channel
DIMM Type POR Speeds Ranks per DIMM
(any combination)
3 1 Registered
DDR3 ECC
1066, 1333 Single Rank, Dual
Rank
3 1 Registered
DDR3 ECC
1066 Quad Rank
3 2 Registered
DDR3 ECC
1066, 1333 Single Rank, Dual
Rank
3 2 Registered
DDR3 ECC
800* Quad Rank
3 3 Registered
DDR3 ECC
800* Single Rank, Dual
Rank
3 3 N/A Not Supported Quad Rank
Notes:
For ECC UDIMMs , only Slot 1 and/or Slot 2 may be populated per channel.
*BIOS will automatically reduce the clock speed to 800MHz for RDIMMs rated at
1066MHz and above.
Figure A (rotated 90 degrees)
T-SGPIO2T-SGPIO1
DIMM6
DIMM3DIMM2
DIMM5 DIMM1
DIMM4
DIMM2C
DIMM1C
DDR3 1066/1333 UDIMM/RDIMM requires
DIMM2B
DIMM2A
DIMM1B
DIMM1A
Slot 1, Channel B
Slot 2, Channel B
Slot 3, Channel B
Slot 1, Channel A
Slot 2, Channel A
Slot 3, Channel A
(Blue)
(Blue)