1. What is a PC Power Supply Calculator?

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

Purpose: It helps PC builders select an appropriately sized power supply to ensure system stability and allow for future upgrades.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{total} \) — Recommended PSU wattage (watts)
• \( P_{component} \) — Power consumption of each component (watts)
• 1.2 — 20% overhead factor for efficiency and headroom

Explanation: The calculator sums all component power requirements and adds 20% overhead to account for peak loads and PSU efficiency.

3. Importance of Proper PSU Sizing

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

4. Using the Calculator

Tips: Enter each component's typical power draw. Check manufacturer specs for accurate values. All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why the 20% overhead factor?
A: This accounts for power spikes, PSU aging, and ensures operation at optimal efficiency (usually 50-80% load).

Q2: Where can I find component power consumption?
A: Check manufacturer specifications or use Newegg's component database for reference values.

Q3: Should I round up the PSU wattage?
A: Yes, always choose the next available standard PSU size (e.g., 550W → 600W).

Q4: Does this include RGB lighting?
A: No, add 5-10W per RGB component in the "Other" field if applicable.

Q5: How often should I recalculate?
A: Recalculate whenever upgrading components or adding new hardware to your system.