The present disclosure includes apparatuses and methods related to dual speed memory. A memory module can include a number of memory devices that coupled to a host via a number of first ports and coupled to a controller via a number of second ports. The memory module can be configured to transfer data on the first number of ports at a first clock speed and transfer data on the second number of ports at a second clock speed. An example apparatus can include a first number of memory devices coupled to a host via a first number of ports, and a second number of memory devices coupled to the first number of memory device via a second number of ports, wherein the first number of memory devices are configured to transfer data between the first number of memory devices and the host at a first clock speed via the first number of ports and the second number of memory devices are configured to transfer data between the first number of memory devices and the second number of memory devices at a second clock speed via the second number of ports.