3 Things to Know About RAM Size and Battery Life

RAM size has a negligible effect on battery life The power difference between 8GB and 16GB of laptop RAM is typically under a watt. Modern DDR4 or DDR5 modules use about 2–3 watts per stick at full speed, and even less when idle.

The screen, CPU, and GPU are the real battery drains These components consume far more power than RAM. Upgrading from one stick to two, or from 8GB to 16GB, will change your battery life by only a few minutes.

More RAM can actually save battery in some cases If you run out of RAM and your system starts using the SSD as swap, that uses more power than having extra RAM. So 16GB may be slightly better for battery life if it prevents paging.