You are upgrading the memory of a dualchannel architecture c

You are upgrading the memory of a dual-channel architecture computer that currently has two sticks of SDRAM DDR3 by adding an identical third stick. As you are about to close the computer case, your supervisor comes by and tells you that your upgrade won’t be successful. What does he tell you is the problem?

A. The computer you are working on uses dual-channel memory and memory upgrades must always be installed in pairs.

B. When you upgrade a computer’s memory, you must reseat the other memory modules.

C. Before upgrading a computer’s memory, you must change the BIOS setting to recognize the additional memory.

D. SDRAM DDR3 memory only comes as single-channel modules, and these modules must be installed in pairs in a computer using dual-channel architecture. You must add another stick of memory.

Solution

A. SDRAM DDR3 modules are dual-channel or triple-channel memory. For instance, dual-channel-capable computers access two data channels to double the data throughput from the memory to the memory controller and triple-channel-capable computers access three data channels to triple the data throughput. Each stick of dual-channel or triple-channel memory represents a single channel. Dual-channel memory must be installed in pairs and triple-channel memory must be installed in threes so that the computer can access all channels simultaneously.