A motherboard uses dual channeling, but you have four DIMMs available that differ in size. The motherboard supports all four sizes. Can you install these DIMMs on the board? Will dual channeling be enabled?

We can install four DIMMs with different size, for example if we want 1 GB, 2 GB, 4 GB, and 8 GB, in this example every DIMM are different, but we can install these DIMMs in our motherboard, but the dual channeling, in this case is not enabled, because DIMMs must be with the same size, frequency, latency, and even model, and nowadys there is quad channeling.