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Gaming PC · Ofgem 1 July to 30 September 2026

Ultra PC (RTX 4090) electricity cost — Enthusiast — 3 hours per session

Enthusiast player: 3 hours per session, 5 sessions a week. A <strong>Ultra PC (RTX 4090)</strong> draws 675 W total (GPU 450 W + rest of system 225 W). Cost: £2.64/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

Ultra PC (RTX 4090) — Enthusiast — 3 hours per session: 0.675 kW × 3 h = 2.025 kWh = 52.9p/session. Weekly (5 sessions): £2.64. Monthly: £11.46. Annual: £137.47. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).

Per session
52.9p
Per week (5 sessions)
£2.64
Per month
£11.46
Per year
£137.47

Rig specification

Tier
ultra
GPU
Nvidia GeForce RTX 4090
GPU TDP
450 W
Rest of system
225 W
Total system
675 W
Sessions/week
5

Nvidia RTX 4090 TDP 450 W (published Nvidia spec); rest of system ~225 W ultra build with i9-14900K (125 W TDP) + PSU/fans

How the cost is worked out

  1. System power: 450 W (GPU) + 225 W (CPU + rest) = 675 W total.
  2. Per session: 675 W ÷ 1000 × 3 h = 2.025 kWh × 26.11p = 52.9p.
  3. Weekly: 52.9p × 5 sessions = £2.64.
  4. Monthly: £2.64 × 52 ÷ 12 = £11.46.
  5. Annual: £2.64 × 52 = £137.47.

Same scenario — other gaming rigs

Budget PC (GTX 1660 Super): 96.0p/wkMid-range PC (RTX 3070): £1.37/wkHigh-end PC (RTX 4070): £1.39/wkAMD Ultra PC (RX 7900 XTX): £2.17/wk
See all 5 gaming rig costs

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.