ASUS announced that its Z390 motherboards will support a maximum DRAM capacity of 128GB via a UEFI BIOS update that’s being rolled out from the ASUS support site. ASUS will bring this increased memory support to all Z390 motherboards via additional BIOS updates that will be available soon.
Owners of selected ASUS Z390 motherboards can update their system to support up to 128GB of memory via a BIOS available now on the ASUS support site. Additional BIOS updates for other ASUS Z390 motherboards are coming soon. The Z390 motherboards are compatible with the latest 32GB memory modules listed in the qualified vendors list (QVL) below.
| Vendors | Part No. | Size | SS/DS | Chip Brand | Chip NO. | Timing | Voltage | DIMM socket support (Optional) | ||
| 1 DIMM | 2 DIMM | 4 DIMM | ||||||||
| SL LINK | J4BGUS2G8QHBC | 32GB | DS | Samsung | – | 19-19-19-43 | 1.2V | ● | ● | ● |