How Much Does It Cost to Run a Gaming PC? (UK 2026)
Based on the active UK Ofgem price cap of 24.5p per kWh (1 January 2026 – 31 March 2026).
A typical 450W gaming pc costs £0.11 per hour of continuous use at current UK electricity rates (24.5p/kWh). For typical daily usage (3 hours active gaming load per day (~1.35 kWh/day)), it costs approximately £0.33 per day or £126.01 per year.
Manufacturer specs: NVIDIA RTX 4070 & AMD Ryzen 7 system real-world gaming load measurements (350W–500W load)
* Includes 3W standby consumption outside active hours (£5.62/year).
How to Save Money Running a Gaming PC
- Cap your frame rate in graphics drivers (e.g. at 60 FPS or 120 FPS matching your monitor); rendering surplus frames wastes 30% of GPU power.
- Enable undervolting on your graphics card; you can often reduce power draw by 15% to 20% with zero loss in game performance.
- Use "Sleep" mode rather than leaving the PC running idling overnight; a desktop PC idling at 70W uses 1.7 kWh per 24 hours of non-use.
- Turn off RGB lighting controller software if not needed; running multiple ambient lighting suites increases idle CPU load.
Alternative Appliances Compared
vs. Games Console (PS5 / Xbox Series X)
View running cost →A modern gaming console draws around 180W to 200W, which is less than half the 450W drawn by a desktop gaming rig.
vs. Gaming Laptop
View running cost →Gaming laptops use highly optimized mobile components capped between 100W and 180W total system power.
Gaming PC Technical Power Profile
Source data: NVIDIA RTX 4070 & AMD Ryzen 7 system real-world gaming load measurements (350W–500W load)
Frequently Asked Questions: Gaming PC Electricity Costs
How much does it cost to run a gaming PC for 3 hours in the UK?â–¾
At 450W active load, 3 hours of gaming consumes 1.35 kWh. At 24.5p/kWh, this costs approx. 33.1p per day (or about £9.92 per month).
Does an 850W power supply always draw 850W?â–¾
No. The wattage on a power supply unit (PSU) is its maximum rated capacity. The PC only draws whatever wattage its components (CPU, GPU, fans) require at any given moment.
How much electricity does a gaming PC use when idling on the desktop?â–¾
A modern gaming desktop idles at around 50W to 80W. If left on 24/7 without sleep, this idle draw alone costs £107 to £171 per year.
How much does undervolting a GPU save in electricity?â–¾
Undervolting an NVIDIA RTX 3080 or 4080 typically reduces power draw by 50W to 80W. For a heavy gamer playing 20 hours a week, this saves around £20 to £35 annually.
Does playing games in 4K use more electricity than 1080p?â–¾
Yes. Rendering in 4K forces the graphics card to run at sustained 99% GPU utilization, pulling maximum power compared to lighter 1080p loads.