3 Things to Know About the Power Cost of 16GB vs. 32GB of RAM

The idle power difference is tiny In an idle system, 32GB of RAM uses only about 1–2 extra watts compared to 16GB. That’s less than a dim LED bulb.

Capacity doesn’t double power draw RAM power depends on chip count and activity, not total capacity. Idle RAM just refreshes at a trickle, so doubling capacity barely increases power.

The annual cost is negligible At typical US electricity rates, that extra 2 watts costs about $2–3 per year if the PC runs 24/7. Buy 32GB if you need the performance—the electricity cost isn’t worth worrying about.