How do i do dual-channel with only 2 RAM slots?

2 ram slot motherboard   Dan 2 dragons slot

Description · 1 PCIe x16, 1 PCIe x16 · CH HD Audio with Content Protection · 4 SATA3, 2 SATA2, 4 USB Gen1, 8 USB

H61 Motherboard with Slot Combo + i5 Processor+ 16GB DDR3 Desktop Ram+ Free CPU Fan ZEBRONICS Z310 NVMe Micro-ATX Motherboard Support 2-DIMM DDR4-1866213324002666 up to 32G maximum capacity; Support 12 x PCIe slots; Support Connector; Support HDMI Connector PDF

candy jar clusters slot RAM computer RAM Most computers have expansion slots on the motherboard that allow you to add various types of expansion cards  In general, most motherboards will have a recommended slot for installing a single RAM stick, which is usually the slot closest to the CPU