High-end PC (RTX 4070) electricity cost — 2 hours gaming + 6 h idle standby
PC is on for 8 hours (2 h active gaming + 6 h idle/video/browsing) on 5 days. Idle system draw estimated at 80 W. A <strong>High-end PC (RTX 4070)</strong> draws 355 W total (GPU 200 W + rest of system 155 W). Cost: £1.55/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
High-end PC (RTX 4070) — 2 hours gaming + 6 h idle standby: 0.355 kW × 2 h active = 0.710 kWh + 0.08 kW × 6 h idle = 0.480 kWh. Session total: 1.190 kWh = 31.1p. Weekly (5 sessions): £1.55. Monthly: £6.73. Annual: £80.78. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).
- Per session
- 31.1p
- Per week (5 sessions)
- £1.55
- Per month
- £6.73
- Per year
- £80.78
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
- Active gaming (2 h): 355 W ÷ 1000 × 2 h = 0.710 kWh × 26.11p = 18.5p.
- Idle (6 h): 80 W ÷ 1000 × 6 h = 0.480 kWh × 26.11p = 12.5p.
- Per session total: 1.190 kWh = 31.1p.
- Weekly: 31.1p × 5 days = £1.55.
- Annual: £1.55 × 52 = £80.78.
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.