1. What is a Power Supply Calculator for Gaming PC?

Definition: This calculator estimates the recommended power supply unit (PSU) wattage for a gaming PC based on component power requirements.

Purpose: It helps PC builders select an appropriately sized power supply to ensure stable operation 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% headroom factor for efficiency and future upgrades

Explanation: The calculator sums all component power requirements and adds a 20% safety margin to ensure stable operation.

3. Importance of Proper PSU Sizing

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

4. Using the Calculator

Tips: Enter each component's power consumption. Default values are provided for RAM (15W), storage (10W), and other components (50W). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a 20% headroom?
A: The 20% buffer accounts for power spikes, efficiency losses, and future upgrades while keeping the PSU in its optimal efficiency range.

Q2: Where do I find my components' power consumption?
A: Check manufacturer specifications or use online databases like PCPartPicker for typical values.

Q3: Should I round up to available PSU wattages?
A: Yes, always round up to the nearest standard PSU wattage (e.g., 550W → 600W or 650W).

Q4: Does this include overclocking?
A: No, if you plan to overclock, add an additional 10-20% to the calculated wattage.

Q5: How important is PSU quality?
A: Extremely important. Always choose a PSU from reputable brands with at least 80+ Bronze certification.