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Gaming PC · Ofgem 1 July to 30 September 2026

High-end PC (RTX 4070) electricity cost — Weekend marathon — 8 hours on two days

Weekend-warrior: 8-hour gaming sessions on Saturday and Sunday. A <strong>High-end PC (RTX 4070)</strong> draws 355 W total (GPU 200 W + rest of system 155 W). Cost: £1.48/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

High-end PC (RTX 4070) — Weekend marathon — 8 hours on two days: 0.355 kW × 8 h = 2.840 kWh = 74.2p/session. Weekly (2 sessions): £1.48. Monthly: £6.43. Annual: £77.12. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).

Per session
74.2p
Per week (2 sessions)
£1.48
Per month
£6.43
Per year
£77.12

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
2

Nvidia RTX 4070 TDP 200 W (published spec); rest of system ~155 W high-end build

How the cost is worked out

  1. System power: 200 W (GPU) + 155 W (CPU + rest) = 355 W total.
  2. Per session: 355 W ÷ 1000 × 8 h = 2.840 kWh × 26.11p = 74.2p.
  3. Weekly: 74.2p × 2 sessions = £1.48.
  4. Monthly: £1.48 × 52 ÷ 12 = £6.43.
  5. Annual: £1.48 × 52 = £77.12.

Same scenario — other gaming rigs

Budget PC (GTX 1660 Super): £1.02/wkMid-range PC (RTX 3070): £1.46/wkUltra PC (RTX 4090): £2.82/wkAMD Ultra PC (RX 7900 XTX): £2.32/wk
See all 5 gaming rig costs

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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.