Why Efficiency Matters A significant element of a PSU's efficiency rating is the difference between its rating value and 100%, because that's how much AC power is going unused. So, for example, a ...

A highly efficient system should have an AFUE rating between 85 and 98.5 percent. What Is Energy-Star Certification?

Essentially, the only vehicles with an MPG rating alone are exclusively gas-powered models, or those that typically can't run on electric power alone, such as mild hybrids and conventional hybrids.

A 1.5-ton split inverter AC with 5-star BEE rating offers low electricity bills by using convertible modes of operation.

A 25,000mAh battery equates to a 95Whr capacity. An 80% power efficiency rating (which is standard for power banks) means you get about 76Whr of usable charge.

Corsair is ditching 80 Plus ratings for its power supplies. Instead, it'll opt exclusively for an efficiency standard from Cybenetics. Don't worry, it's a pretty easy switch to get your head around.

These units also meet stricter power efficiency and stability requirements, making them ideal for the RTX 50-series. If you’re using an older PSU, ensure it comes with a reliable 16-pin adapter.