Explanation:

When two devices with different speeds communicate and transfer data, the transfer speed is limited to the speed of the slower device. However, when it comes to memory transfers, the scenario is different. The memory transfer speed between two variable speed devices is always done at the speed of the faster device. The reason behind this is that the memory transfer speed is not affected by the clock speed of the devices.

The speed of the memory transfer is determined by the memory controller, which is responsible for managing the data transfer between the CPU and the memory. The memory controller is designed to operate at a specific speed, which is usually faster than the clock speed of the CPU. Therefore, when two devices with different speeds communicate with each other, the memory controller sets the transfer speed to match the speed of the faster device.

For example, if a CPU with a clock speed of 2 GHz is communicating with a memory device with a speed of 1 GHz, the memory transfer speed will still be 2 GHz, which is the speed of the CPU. This is because the memory controller is designed to operate at a speed of 2 GHz, which is faster than the speed of the memory device.

Conclusion:

In conclusion, the memory transfer speed between two variable speed devices is always done at the speed of the faster device. This is because the memory controller is responsible for managing the data transfer, and it operates at a specific speed that is usually faster than the clock speed of the CPU. Therefore, the transfer speed is not affected by the speed of the slower device.