Question 1

How much electricity does a gaming PC consume per month or year?

Accepted Answer

For most gamers, a mid-to-high-end gaming PC costs between $3.00 and $18.00 per month ($35 to $220/year) depending on your hardware, daily gaming hours, and local electricity rate. In low-cost regions (~$0.12-$0.14/kWh) costs are modest, while in high-tariff regions ($0.30-$0.38/kWh), a 500W rig played 4 hours daily adds over $200-$280 annually.

Question 2

Does my GPU or CPU rated TDP mean it is constantly drawing that wattage?

Accepted Answer

No. TDP (Thermal Design Power) is a cooling thermal dissipation specification for heatsink manufacturers, not a continuous wall socket meter reading. Modern GPUs (NVIDIA Ada Lovelace, AMD RDNA 3) constantly boost and throttle dynamically based on engine load.

Question 3

Should I turn off my gaming PC or put it in Sleep mode overnight?

Accepted Answer

Modern Windows Sleep mode (S3 or Modern Standby) suspends RAM and powers down all drives, GPU, and fans, consuming only 1.5W to 3W—costing less than $0.05 a month. However, leaving your PC fully awake at desktop idle consumes 45W to 85W, which wastes $25 to $50 annually.

Question 4

How much electricity does undervolting a GPU save?

Accepted Answer

Undervolting modern graphics cards (like the RTX 4080 or RTX 4090) typically reduces power draw by 15% to 25% (saving 50W to 90W) with virtually identical FPS performance, reducing system heat and annual electricity bills.