Newegg Power Supply Calculator Today

Calculators provide excellent baselines but cannot account for real-world user behaviors.

The 80 PLUS certification guarantees that the power supply converts wall AC power to PC DC power efficiently without wasting excess heat.

The Newegg Power Supply Calculator is a free digital tool designed to estimate the total wattage your custom computer requires. Choosing the correct Power Supply Unit (PSU) prevents system instability, hardware damage, and unnecessary energy expenses. Why Accurate Wattage Calculation Matters newegg power supply calculator

Select the video card manufacturer and model, as GPUs are the largest power consumers.

Essential cables (24-pin ATX and CPU power) are permanently attached, while GPU and SATA cables are removable. Choosing the correct Power Supply Unit (PSU) prevents

It accounts for RAM (number of sticks and size), storage (SSDs and HDDs), optical drives, and even peripherals like RGB fans.

Input the number of sticks and the generation (e.g., DDR4 or DDR5) installed in the system. It accounts for RAM (number of sticks and

Heavy-duty pumps and multiple high-static pressure radiator fans add noticeable wattage loads.