Here’s a look at PSU power utilization.

The Corsair RMx series offers reliability, fully modular connectors, and a 10-year warranty.

The PSU will supply only as much power as your PC requires and no more.

PSUEfficiency1

Further, you’d struggle to notice a difference in your electric bill.

PSUs have an efficiency curve.

Peak efficiency is around 50% of the rated load.

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The Corsair RMx series offers reliability, fully modular connectors, and a 10-year warranty.

How efficient or inefficient it might be is typically described using the 80 Plus certification terminology.

Related:What Is “80 Plus” Certification on a PSU?

A 2-3% loss of efficiency for anything above the Basic certification is expected.

So what does this mean, practically speaking?

Let’s say we have a PC build that requires 250W of power.

250W * 1.10 = 275W.

We lose 25W in the conversion process.

So now our conversion overhead is 13%, or 250W * 1.13 = 282.5.

We lose 32.5 watts.

The difference between the two overhead losses is only 7.5 watts.

Although that’s enough energy to power an LED lightbulb, it’s not a whole lot of energy.