AMD Ultra PC (RX 7900 XTX) 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>AMD Ultra PC (RX 7900 XTX)</strong> draws 555 W total (GPU 355 W + rest of system 200 W). Cost: £2.08/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
AMD Ultra PC (RX 7900 XTX) — 2 hours gaming + 6 h idle standby: 0.555 kW × 2 h active = 1.110 kWh + 0.08 kW × 6 h idle = 0.480 kWh. Session total: 1.590 kWh = 41.5p. Weekly (5 sessions): £2.08. Monthly: £8.99. Annual: £107.94. Source: Nvidia / AMD / Intel — published TDP specifications for GPU and CPU components + Ofgem (OGL v3.0).
- Per session
- 41.5p
- Per week (5 sessions)
- £2.08
- Per month
- £8.99
- Per year
- £107.94
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
- Active gaming (2 h): 555 W ÷ 1000 × 2 h = 1.110 kWh × 26.11p = 29.0p.
- Idle (6 h): 80 W ÷ 1000 × 6 h = 0.480 kWh × 26.11p = 12.5p.
- Per session total: 1.590 kWh = 41.5p.
- Weekly: 41.5p × 5 days = £2.08.
- Annual: £2.08 × 52 = £107.94.
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.