Calculating your PSU requirement is not magic—it is a science of voltage, amperage, efficiency curves, and transient spikes. This guide will transform you from a wattage guesser into a power calculation expert.

While manual calculation is good for estimates, online calculators have databases with specific manufacturer data, including peak spikes.

Mining stresses the GPU at 100% 24/7 but leaves the CPU near idle.

You should look for a 650W PSU . (Always round up to the nearest standard wattage).

PSUs have efficiency ratings: 80 Plus Bronze, Gold, Platinum, Titanium. These ratings indicate how much AC power from the wall converts to DC power for your PC.

Assign a flat estimate of roughly 150 watts for the motherboard, RAM modules, storage drives, and cooling fans combined. 2. Use a PSU Calculator

Calculating the correct power supply (PSU) for a PC involves more than just adding up the wattage listed on the box of your components. To do it accurately, you need to account for peak power draws, efficiency, and future upgrades.

$180 + 200 + 75 + 25 = 480\text Watts$