Calculating the power loss of a '80 Plus' PSU in Watts
Calculating the power loss of a '80 Plus' PSU in Watts
The definition explains how the 80 Plus certification evaluates PSU performance under various loads. It states specific efficiency targets at 20%, 50%, and 100% loads. Your scenario involves a 470 Watt 80 Plus Bronze unit delivering 235 W at full load, which implies an efficiency of about 85% at that level. The question asks whether this suggests roughly 15% energy loss, bringing the output nearer to 200 W. This aligns with understanding the certification thresholds and your goal of reducing power draw for better efficiency.
Ah - I see the issue, haven't I?
In my case where the PSU is drawing 235W at the wall, that's not the actual load at the PSU output (like a 50% load), but rather closer to 200W (a drop from about 15% of 235W).
But the overall concept still makes sense, yes? An 85% efficiency means roughly a 15% loss?
you captured the main point correctly. take the material being removed from the wall and calculate the 80% or 85% as the PSU uses. remember, this isn't a fixed rule, but a helpful reference. it won't always hit exactly 10 or 15%, but it provides a solid estimate.
A psu will only supply the power it needs, not exceeding its maximum capacity.
Efficiency mainly concerns the heat produced or the electricity cost.
To lower the power consumption, focus on the parts that consume energy.
Typically, the cpu and gpu are the main contributors.