Asus makes both AMD and Intel CPU compatible motherboards. An Intel 4460 CPU would need a socket 1150 motherboard. It's the socket that is the critical component in matching a CPU/APU with a motherboard. The motherboard needs to have the socket architecture to match the CPU.
The relevant information for the questions asked is in the post #1 and post #7. He's going from an AMD mATX mobo to an Intel mATX board-so it should fit in the same case. The new board he listed supports DDR3, same as the old board. The new (Asus) board model given in post #1 supports the chip given in post #7. I don't understand all the confusion?