Memory Support

The H8DGT-HF/-HIBQF supports up to 64GB of DDR3 ECC/Non-ECC UDIMM or up to 256GB of ECC DDR3 RDIMM (1333/1066/800MHz in 16 DIMM slots). Populating DIMMs in groups of four, one per channel (4, 8 DIMMs/CPU), the same DIMM type in each channel, the same amount of memory on each CPU will improve memory performance. Please refer to the table below:

Table 1 - Per channel populations options
  DIMM A DIMM B Max. MHz, 1.5V DIMMs Max. MHz, 1.35V DIMMs Max. GB / channel
UDIMM SR or DR Empty 1333 MHz 1333 MHz 8 GB
SR SR
DR DR
RDIMM SR or DR Empty 1333 MHz 1333 MHz 16 GB
SR SR
DR DR
QR Empty 1333 MHz 1333 MHz 16 GB
QR QR 1066 MHz 800 MHz 32 GB

Memory Population Guidelines

Please follow the tables below when populating the H8DGT-HF/-HIBQF

Table 2 - Memory Population for Optimal Performance (For a Motherboard with One CPU (CPU1) Installed)
# DIMMs CPU Channel 1 Channel 2 Channel 3 Channel 4
4 DIMMs CPU 1 P1-1A   P1-2A   P1-3A   P1-4A  
8 DIMMs CPU 1 P1-1A P1-1B P1-2A P1-2B P1-3A P1-3B P1-4A P1-4B
Table 3 - Memory Population for Optimal Performance (For a Motherboard with Two CPU (CPU1 & CPU2) Installed)
# DIMMs CPU Channel 1 Channel 2 Channel 3 Channel 4
8 DIMMs CPU 1 P1-1A   P1-2A   P1-3A   P1-4A  
CPU 2 P2-1A   P2-2A   P2-3A   P2-4A  
16 DIMMs CPU 1 P1-1A P1-1B P1-2A P1-2B P1-3A P1-3B P1-4A P1-4B
CPU 2 P2-1A P2-1B P2-2A P2-2B P2-3A P2-3B P2-4A P2-4B

UDIMM: Unbuffered DIMM
RDIMM: Registered DIMM