Recommendation = total × 1.3 headroom, rounded up to the nearest common PSU rating. This is an estimate — use an inline wattmeter for exact numbers.
Recommended PSU
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Why headroom matters
A power supply runs most efficiently at 40–80% load. Oversizing slightly keeps it quiet and cool.
Transient spikes
GPUs can draw double their rated power for milliseconds — headroom prevents shutdowns.
Efficiency
80 Plus Platinum/Gold units stay above 90% efficiency between 20–100% load.
Future upgrades
A little extra wattage today saves a PSU swap when you upgrade the GPU later.
Common PSU ratings
Match your build to a widely available rating:
- • 450–550 W — office PCs and budget gaming with low-power GPUs.
- • 650–750 W — mainstream gaming (mid-range CPU + GPU).
- • 850–1000 W — high-end rigs with flagship GPUs and overclocking.
- • 1200 W+ — multi-GPU, Threadripper, or heavy OC setups.
More tech tools
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