dimm slots
Supermicro X12SPA-TF Workstation Motherboard, Intel Xeon, 16 DDR ...
You need a motherboard with only two DIMM slots to do anything spectacular with memory overclocking. The motherboard with four DIMM slots are always going to fall short.
Amazon.com: MSI B560M PRO-E ProSeries Motherboard (mATX, 11th ...
Mini-ITX motherboards only have two DIMM slots and one PCIe slot and micro-ATX motherboards can have either two or four DIMM slots and up to three PCIe slots.
DIMM Slots: What Are They And Why They Matter? | WhatsaByte
The number of RAM slots you have is the same as how many DIMM slots you have, so what you actually need to determine is how many DIMM slots you have.
ASUS ROG Maximus Z790 Formula LGA 1700 ATX ...
2 The DIMM.2 Slots are disabled by default. Please adjust BIOS settings to enable DIMM.2 Slots. *3 When M.2_1 is operating in SATA mode, SATA6G_2 will be disabled.