GUIDE
80 Plus Bronze vs Gold vs Platinum: what PSU efficiency ratings mean
80 Plus measures one thing: how much of the power a PSU pulls from the wall actually reaches your parts. Gold is the sweet spot for most builds, and the badge says nothing about noise, build quality or protections.
What the badge means
A power supply turns wall power (AC) into the 12V, 5V and 3.3V your parts run on (DC). Some power is lost as heat along the way. The 80 Plus level tells you the minimum share that has to make it through. An 80 Plus Gold unit, for example, has to deliver at least 87–90% of what it pulls from the wall, depending on load.
The levels
Minimum efficiency at each share of the PSU's rated wattage:
| Level | 20% load | 50% load | 100% load |
|---|---|---|---|
| 80 Plus | 80% | 80% | 80% |
| Bronze | 82% | 85% | 82% |
| Silver | 85% | 88% | 85% |
| Gold | 87% | 90% | 87% |
| Platinum | 90% | 92% | 89% |
| Titanium* | 92% | 94% | 90% |
These are the 115V figures used in North America. On 230V power, as in most of Europe, every level has to hit a few points higher. *Titanium also has to reach 90% at 10% load, the only level with a light-load requirement.
What it saves on your power bill
Say your gaming PC's parts pull 400W for 4 hours a day. Using the 50% load figures:
| Level | Pulled from the wall | Wasted as heat |
|---|---|---|
| Bronze (85%) | 471W | 71W |
| Gold (90%) | 444W | 44W |
| Platinum (92%) | 435W | 35W |
Going from Bronze to Gold saves about 26W while gaming. Over a year at 4 hours a day, that's about 38 kWh, or roughly $6 at 15¢ per kWh. Gold to Platinum saves about another $2 a year.
The bigger difference is heat. Less wasted power means less heat for the PSU's fan to move, so a more efficient unit tends to run cooler and quieter under load.
What 80 Plus doesn't tell you
The badge only measures efficiency. It says nothing about:
- Noise and when the fan kicks in.
- Voltage regulation and ripple, how steady the power your parts get is.
- Protections like over-current, over-voltage, over-temperature and short-circuit protection.
- How it handles GPU power spikes. That's what the ATX 3.x spec covers. See ATX 3.0 vs ATX 3.1.
- Component quality and warranty.
Two Gold units can be very different. Read a proper review, or look the model up on Cybenetics, which rates efficiency (its ETA levels) and noise (its LAMBDA levels) across many loads instead of just three.
Light loads and oversized PSUs
Power supplies are least efficient at very light loads. A 1600W unit idling a 100W desktop is running at about 6% of its rating, below where most levels are even tested. That's one reason the calculator sizes your PSU to the build instead of just saying "get the biggest one."
Which one to buy
- Bronze: fine for budget builds, as long as it's from a reputable brand and the rest of the spec sheet holds up.
- Gold: the sweet spot for most builds. Good efficiency, wide choice, sensible prices.
- Platinum or Titanium: worth it for a PC that runs 24/7, a small case where heat matters, or if you want the quietest unit you can get.