Is an 80 Plus Gold power supply worth it for a Monero miner?

Yes—an 80 Plus Gold power supply is often worth it for a Monero mining PC that runs around the clock, especially if you are buying a new power supply anyway. But replacing a reliable unit just to get a Gold label may not save enough electricity to cover the cost. Your actual power draw, electricity rate, and upgrade price matter more than the badge.

What Gold changes for your miner

Your power supply, or PSU, converts electricity from your wall outlet into power your computer can use. Some energy is lost as heat during that conversion.

80 Plus Gold is an efficiency certification, not a promise of better mining performance. For a typical desktop PSU tested at 115 volts, Gold requires at least 87% efficiency at 20% load, 90% at half load, and 87% at full load. Requirements differ for other voltage and power-supply categories.

A more efficient PSU can give you:

• Lower electricity use at the wall for the same mining work.
• Less heat from the PSU itself.
• Potentially less fan noise, depending on its design.

It does not directly increase your mining speed.

Match the power supply to a CPU miner

Monero uses RandomX, a mining algorithm—the set of calculations used to mine—that favors CPUs. That makes a Monero-only machine different from a mining rig packed with power-hungry graphics cards.

Choose your PSU around the whole computer’s needs, including its CPU, motherboard, memory, drives, and any graphics card. Leave room for brief power spikes and planned upgrades, but avoid buying a huge unit without a reason.

For example, a machine needing 200 watts from its PSU would put:

• A 400-watt PSU at 50% load.
• A 1,000-watt PSU at 20% load.

Both can work, but their efficiency at that operating point may differ. Gold does not guarantee excellent efficiency at very low loads. Check independent testing near your expected mining load rather than assuming a bigger unit is better.

A plug-in electricity meter measures consumption at the wall, including conversion losses. That is the figure you pay for.

Calculate whether the savings repay the price

Here is an illustrative comparison, not a prediction for your hardware.

Suppose your components need 200 watts while mining:

• At 85% PSU efficiency, wall consumption is about 235 watts.
• At 90% efficiency, wall consumption is about 222 watts.
• The difference is roughly 13 watts.

Running continuously, that saves about 114 kilowatt-hours per year. A kilowatt-hour, or kWh, is the electricity billing unit: using 1,000 watts for one hour.

At an example rate of $0.20 per kWh, that is roughly $23 per year. A $40 price premium would take about 21 months to recover. Paying $100 to replace a working PSU would take much longer.

Use your own electricity rate and measured consumption. Part-time mining produces smaller savings.

Check quality, especially for servers

Gold measures efficiency under specified tests. It does not certify overall build quality, electrical protections, or lifespan.

Look for independent reviews, suitable CPU power connectors, a solid warranty, and reliable protection features. Never reuse modular PSU cables unless the manufacturer explicitly confirms compatibility.

For servers, also check physical fit, proprietary connections, and efficiency under your actual load. Redundant power supplies can change how load is shared, so measure the complete server at the wall.

The bottom line

For a new, always-on Monero miner, a well-sized, well-reviewed Gold PSU is usually sensible. Keep a reliable existing unit unless measured savings justify replacement. Better efficiency lowers costs; it does not guarantee profitable mining.