Gigabyte E251-U70, User Manual, Page: 30 / 111

System Hardware Installation - 24 -
3-5-2 Installing a Memory
Before installing a memory module, make sure to turn off the system and unplug the power cord
from the power outlet to prevent damage to the memory module.
Be sure to install DDR4 DIMMs on this motherboard.
Follow these instructions to install the Memory:
1. Insert the DIMM memory module vertically into the DIMM slot, and push it down.
2. Close the plastic clip at both edges of the DIMM slots to lock the DIMM module.
3. Reverse the installation steps when you want to remove the DIMM module.
1
2
2
3-5-3 DIMM Population Rule
Be sure to install DDR4 DIMMs on this motherboard.
• The initial DIMMs installed must be installed in the primary CPU (CPU0) memory slots first.
• When populating DIMMs into a channel, slot numbers having the suffix "0" must be populated first, then
followed by slot numbers having the suffix "1".
• A combination of LRDIMMs and RDIMMs is not allowed in the same channel.
• A combination of non-3DS and 3DS LRDIMMs is not allowed in the same channel.
Type
Ranks Per DIMM
and Data Width
DIMM Capacity (GB)
Speed (MT/s); Voltage (V);
Slots per Channel(SPC) and
DIMM per Channel (DPC)
1 Slot Per Channel
DRAM Density 1DPC
4Gb* 8Gb 16Gb 1.2V
RDIMM SRx8 4GB 8GB 16GB
2933
RDIMM SRx4 8GB 16GB 32GB
RDIMM DRx8 8GB 16GB 32GB
RDIMM DRx4 16GB 32GB 64GB
RDIMM 3DS
QRx4 N/A 2H-64GB 2H-128GB
8Rx4 N/A 4H-128GB 4H-256GB
LRDIMM QRx4 32GB 64GB 128GB
LRDIMM 3DS
QRx4 N/A 2H-64GB 2H-128GB
8Rx4 N/A 4H-128GB 4H-256GB