What is the maximum RAM the PRIME B660-PLUS D4 supports, and what speeds are compatible?

The motherboard supports a maximum of 128GB of DDR4 memory across 4 DIMM slots. Supported speeds range from 2133 MHz up to 5066 MHz (OC), including native speeds of 2133/2400/2666/2800/2933/3000/3200 for 12th Gen Intel processors. The board supports Dual Channel Memory Architecture and is compatible with Intel Extreme Memory Profile (XMP).