Quote:GIGABYTE has released UEFI BIOS updates for its motherboards based on Intel’s C246 and Z390 chipsets that enable support for 32 GB unbuffered memory modules from Samsung. This enables 128 GB of DDR4 on its higher-end mainstream desktop platforms. The compatibile UDIMMs are based on Samsung’s 16 Gb memory chips and are expected to be available in the market shortly.

To date, GIGABYTE has validated 32 GB DDR4-2667 CL19 UDIMMs only with its Intel C246 and Z390-powered platforms, which is logical as owners of such motherboards are more likely to need 128 GB of memory and buy the modules. It also remains to be seen when and if support for such modules will come to other platforms.

Intel recently updated its memory reference code (MRC) for the 9th Gen Core processors that enables the said CPUs to work with unbuffered memory modules that use 16 Gb memory chips. Previously, only Intel’s HEDT and workstation processors could work with 32 GB RDIMM modules based on 8 Gb DRAM devices, whereas support for 16 Gb chips is still limited to select platforms.

Full reading: https://www.anandtech.com/show/13892/gigabyte-adds-support-for-128-gb-of-memory-to-z390-c246-motherboards