| drmaster wrote: | 
		  | There are 4 memory slot. 2 slot is occupied by pc 5300 dual channel memory
 I am planning to add 2 more  dual channel memory but it's pc 6400.
 Will dual channel still work?
  | 
yes but the new memory will run at the slower speed of the old.
Ryzen 5 5600, ASUS ROG STRIX B550-F GAMING WIFI II, Corsair Vengeance RGB RT 32GB 3600MHz C16, MSI RTX 5070 Ti Ventus 3X OC , Corsair RMx Series RM750x. AOC AGON AG324UX - 4K 144Hz 1ms