High-end PC (RTX 4070) electricity cost — School-age — 1 h after school (weekdays)
Typical school-age child: 1 hour gaming after school on weekdays. A <strong>High-end PC (RTX 4070)</strong> draws 355 W total (GPU 200 W + rest of system 155 W). Cost: 46.3p/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
High-end PC (RTX 4070) — School-age — 1 h after school (weekdays): 0.355 kW × 1 h = 0.355 kWh = 9.3p/session. Weekly (5 sessions): 46.3p. Monthly: £2.01. Annual: £24.10. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).
- Per session
- 9.3p
- Per week (5 sessions)
- 46.3p
- Per month
- £2.01
- Per year
- £24.10
Rig specification
- Tier
- high-end
- GPU
- Nvidia GeForce RTX 4070
- GPU TDP
- 200 W
- Rest of system
- 155 W
- Total system
- 355 W
- Sessions/week
- 5
Nvidia RTX 4070 TDP 200 W (published spec); rest of system ~155 W high-end build
How the cost is worked out
- System power: 200 W (GPU) + 155 W (CPU + rest) = 355 W total.
- Per session: 355 W ÷ 1000 × 1 h = 0.355 kWh × 26.11p = 9.3p.
- Weekly: 9.3p × 5 sessions = 46.3p.
- Monthly: 46.3p × 52 ÷ 12 = £2.01.
- Annual: 46.3p × 52 = £24.10.
Same scenario — other gaming rigs
Track gaming PC running costs
Updated each time the Ofgem cap changes.
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GPU TDP from Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components. Unit rate 26.11p/kWh from Ofgem — Energy price cap unit rates and standing charges (1 July to 30 September 2026), OGL v3.0. Last updated: 2026-06-20.