1. What is the PSU AC Power Calculation?

The PSU AC Power calculation determines the required AC power supply wattage for a computer based on its DC load, accounting for typical power supply efficiency (85%).

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( PSU_{AC} \) — Required AC power supply wattage
• \( DC_{Load} \) — Total DC power consumption of components
• 0.85 — Typical power supply efficiency (85%)

Explanation: The equation accounts for the conversion efficiency between AC power from the wall and DC power delivered to computer components.

3. Importance of Proper PSU Sizing

Details: Proper power supply sizing ensures stable operation, prevents overloads, and accounts for efficiency losses in the power conversion process.

4. Using the Calculator

Tips: Enter the total DC load in watts (sum of all component power requirements). The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 0.85?
A: This accounts for typical 85% efficiency in power supplies, meaning about 15% of AC power is lost as heat during conversion to DC.

Q2: Should I add a safety margin?
A: Yes, it's recommended to add 10-20% to the calculated value to account for power spikes and future upgrades.

Q3: What if my PSU has different efficiency?
A: For 80+ Platinum (90% efficiency), divide by 0.90 instead. Adjust the divisor based on your PSU's certified efficiency rating.

Q4: How do I find my DC load?
A: Sum the power requirements of all components (CPU, GPU, drives, etc.) or use online PSU calculators that estimate total system power.

Q5: Does this account for power factor?
A: This simple calculation doesn't account for power factor. For precise calculations, consider both efficiency and power factor.