1. What is a Power Supply Calculator?

Definition: This calculator estimates the wattage needed for a computer power supply unit (PSU) based on component 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 for efficiency and future upgrades

Explanation: The calculator sums all component power requirements and adds a 20% buffer for safety and efficiency.

3. Importance of Proper PSU Sizing

Details: An adequately sized power supply ensures system stability, prevents crashes, and allows for future upgrades while operating efficiently.

4. Using the Calculator

Tips: Enter the wattage for each component. Typical values:

• CPU: 65-250W (check your processor specifications)
• GPU: 75-450W (check your graphics card specifications)
• RAM: 5-10W per stick
• Storage: 5-10W per drive

5. Frequently Asked Questions (FAQ)

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

Q2: Where can I find component 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 include multiple GPUs?
A: No, if using multiple GPUs, add each GPU's wattage separately.

Q5: What about overclocking?
A: For overclocking, consider adding an additional 10-20% to the calculated wattage.