Definition
80 Plus is a voluntary certification program (administered by CLEAResult) that rates how efficiently a power supply unit converts wall AC into the DC its load consumes. To earn the base badge, a PSU must hit at least 80% efficiency at 20%, 50%, and 100% of rated load. Higher tiers — Bronze, Silver, Gold, Platinum, Titanium — demand progressively tighter efficiency at each load point, with Titanium also adding a test at 10% load.
What the tiers mean in practice
Rough efficiency targets at 50% load run from about 85% for Bronze, 90% for Gold, up to 94% for Titanium. The lost percentage doesn't vanish — it becomes waste heat. A 3,500-watt mining PSU running at 90% efficiency instead of 80% sheds hundreds of watts less heat and draws meaningfully less from the wall for the same hashrate. Over a year of 24/7 operation, that delta is real money and real cooling load avoided.
Why miners should care
Mining is uniquely unforgiving here because the load runs flat-out around the clock. Even a few efficiency points compound across a fleet into thousands of kilowatt-hours. Higher-tier units also tend to use better components and tighter voltage regulation, which matters for the stable rails ASIC hashboards prefer. That said, an 80 Plus badge certifies efficiency, not raw capacity or build quality — always size the PSU's wattage to the miner with headroom.
Efficiency is only half the story; the other half is delivering that power cleanly to the racks. See the power distribution unit entry, and to understand how efficiency interacts with your bill, read about the time-of-use rate.
In Simple Terms
80 Plus is a voluntary certification program (administered by CLEAResult) that rates how efficiently a power supply unit converts wall AC into the DC its…