Installing Memory Modules (So-Dimm) - ASROCK J3455-ITX User Manual

2.1 Installing Memory Modules (SO-DIMM)

This motherboard provides two 204-pin DDR3/DDR3L (Double Data Rate 3)
SO-DIMM slots.
It is not allowed to install a DDR or DDR2 memory module into a DDR3/DDR3L
slot; otherwise, this motherboard and SO-DIMM may be damaged.
The SO-DIMM only fits in one correct orientation. It will cause permanent damage
to the motherboard and the SO-DIMM if you force the SO-DIMM into the slot at
incorrect orientation.
10