1. What is a Computer Power Supply Calculator?

Definition: This calculator estimates the recommended power supply unit (PSU) wattage based on your computer components' power consumption.

Purpose: It helps PC builders select an appropriately sized power supply for their system configuration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{supply} \) — Recommended power supply wattage
• \( P_{component} \) — Power consumption of each component
• 1.2 — 20% overhead factor for efficiency and future upgrades

Explanation: The calculator sums all component power requirements and adds a 20% buffer to ensure stable operation and headroom for upgrades.

3. Importance of Proper PSU Sizing

Details: An adequately sized PSU ensures system stability, prevents crashes, improves efficiency, and allows for future component upgrades.

4. Using the Calculator

Tips: Enter the wattage for each component category. Default values represent typical mid-range components. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 20% overhead?
A: The overhead accounts for power spikes, efficiency losses, and provides room for future upgrades.

Q2: Where can I find my components' wattage?
A: Check manufacturer specifications or use Newegg's component database for accurate power consumption figures.

Q3: Should I round up to available PSU sizes?
A: Yes, always round up to the nearest standard PSU wattage (e.g., 550W, 650W, 750W).

Q4: Does this account for overclocking?
A: No, if you plan to overclock, add 15-20% to the calculated wattage.

Q5: What about multiple GPUs?
A: Add each GPU's wattage separately in the calculator.