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Gaming PC · Ofgem 1 July to 30 September 2026

AMD Ultra PC (RX 7900 XTX) electricity cost — Weekend marathon — 8 hours on two days

Weekend-warrior: 8-hour gaming sessions on Saturday and Sunday. A <strong>AMD Ultra PC (RX 7900 XTX)</strong> draws 555 W total (GPU 355 W + rest of system 200 W). Cost: £2.32/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

AMD Ultra PC (RX 7900 XTX) — Weekend marathon — 8 hours on two days: 0.555 kW × 8 h = 4.440 kWh = £1.16/session. Weekly (2 sessions): £2.32. Monthly: £10.05. Annual: £120.57. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).

Per session
£1.16
Per week (2 sessions)
£2.32
Per month
£10.05
Per year
£120.57

Rig specification

Tier
ultra
GPU
AMD Radeon RX 7900 XTX
GPU TDP
355 W
Rest of system
200 W
Total system
555 W
Sessions/week
2

AMD RX 7900 XTX TBP 355 W (AMD published spec); rest of system ~200 W with AMD Ryzen 9 7950X (170 W TDP) + cooling

How the cost is worked out

  1. System power: 355 W (GPU) + 200 W (CPU + rest) = 555 W total.
  2. Per session: 555 W ÷ 1000 × 8 h = 4.440 kWh × 26.11p = £1.16.
  3. Weekly: £1.16 × 2 sessions = £2.32.
  4. Monthly: £2.32 × 52 ÷ 12 = £10.05.
  5. Annual: £2.32 × 52 = £120.57.

Same scenario — other gaming rigs

Budget PC (GTX 1660 Super): £1.02/wkMid-range PC (RTX 3070): £1.46/wkHigh-end PC (RTX 4070): £1.48/wkUltra PC (RTX 4090): £2.82/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.