4 x DDR3 DIMM sockets supporting up to 32 GB of system memory * Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than the size of the physical memory installed.
Dual channel memory architecture
Support for DDR3/DDR3L 1866(OC)/1600/1333 MHz memory modules
Support for ECC UDIMM 1Rx8/2Rx8 memory modules (operate in non-ECC mode)
Support for non-ECC UDIMM 1Rx8/2Rx8 memory modules - See more at: https://online.advice.co.th/product/mainboard/intel-1151-vga-on-/gigabyte-h170-hd3-ddr3#sthash.A6wfwKDc.dpuf