High-end PC (RTX 4070) electricity cost — Heavy — 6 hours per session
Heavy user or PC left on for long sessions, 6 hours a day. A <strong>High-end PC (RTX 4070)</strong> draws 355 W total (GPU 200 W + rest of system 155 W). Cost: £3.89/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
High-end PC (RTX 4070) — Heavy — 6 hours per session: 0.355 kW × 6 h = 2.130 kWh = 55.6p/session. Weekly (7 sessions): £3.89. Monthly: £16.87. Annual: £202.44. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).
- Per session
- 55.6p
- Per week (7 sessions)
- £3.89
- Per month
- £16.87
- Per year
- £202.44
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
- 7
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 × 6 h = 2.130 kWh × 26.11p = 55.6p.
- Weekly: 55.6p × 7 sessions = £3.89.
- Monthly: £3.89 × 52 ÷ 12 = £16.87.
- Annual: £3.89 × 52 = £202.44.
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.