1. What is Newegg's Power Supply Calculator?

Definition: This calculator estimates the minimum power supply wattage needed for a PC based on component power consumption.

Purpose: It helps PC builders select an appropriate power supply unit (PSU) to ensure system stability and allow for future upgrades.

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% safety margin for efficiency and headroom

Explanation: The calculator sums all component power requirements and adds a 20% buffer to account for power spikes and efficiency losses.

3. Importance of Proper Power Supply Calculation

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

4. Using the Calculator

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

• CPU: 65-250W (check your processor specs)
• GPU: 75-450W (check your graphics card specs)
• RAM: 5-10W per stick
• Storage: 5-10W per drive
• Other: Include fans, RGB lighting, etc.

5. Frequently Asked Questions (FAQ)

Q1: Why the 20% safety margin?
A: It accounts for power spikes, aging components, and ensures the PSU operates in its most efficient range.

Q2: Should I round up to available PSU wattages?
A: Yes, choose the next available standard wattage (e.g., if you get 478W, choose a 500W or 550W PSU).

Q3: What about 80 Plus certification?
A: This calculator gives total wattage needed. 80 Plus ratings indicate efficiency - higher ratings mean less power wasted as heat.

Q4: How do I find my component wattage?
A: Check manufacturer specifications or use databases like TDP charts for CPUs and GPUs.

Q5: Does this include overclocking?
A: No, if you plan to overclock, add an additional 10-20% to the calculated wattage.