AMD Ultra PC (RX 7900 XTX) electricity cost — School-age — 1 h after school (weekdays)
Typical school-age child: 1 hour gaming after school on weekdays. A <strong>AMD Ultra PC (RX 7900 XTX)</strong> draws 555 W total (GPU 355 W + rest of system 200 W). Cost: 72.5p/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
AMD Ultra PC (RX 7900 XTX) — School-age — 1 h after school (weekdays): 0.555 kW × 1 h = 0.555 kWh = 14.5p/session. Weekly (5 sessions): 72.5p. Monthly: £3.14. Annual: £37.68. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).
- Per session
- 14.5p
- Per week (5 sessions)
- 72.5p
- Per month
- £3.14
- Per year
- £37.68
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
- 5
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
- System power: 355 W (GPU) + 200 W (CPU + rest) = 555 W total.
- Per session: 555 W ÷ 1000 × 1 h = 0.555 kWh × 26.11p = 14.5p.
- Weekly: 14.5p × 5 sessions = 72.5p.
- Monthly: 72.5p × 52 ÷ 12 = £3.14.
- Annual: 72.5p × 52 = £37.68.
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.