1. What is a Power Supply Calculator?

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

Purpose: It helps PC builders select an appropriately sized 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 PSU wattage (watts)
• \( P_{component} \) — Power consumption of each component (watts)
• 1.2 — 20% headroom factor for efficiency and future upgrades

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

3. Importance of Proper PSU Sizing

Details: An adequately sized PSU ensures system stability, improves efficiency, reduces heat output, and allows for future upgrades.

4. Using the Calculator

Tips: Enter the power consumption for each component. Default values are provided for typical RAM, storage, and other components.

5. Frequently Asked Questions (FAQ)

Q1: Why add 20% overhead?
A: The overhead accounts for power spikes, efficiency losses, and future upgrades while keeping the PSU in its most efficient load range.

Q2: Where do I find component wattage?
A: Check manufacturer specifications or use databases like PCPartPicker for typical values.

Q3: Should I round up to standard PSU sizes?
A: Yes, the calculator suggests rounding up to the nearest 50W for standard PSU sizes.

Q4: Does this account for overclocking?
A: No, if you plan to overclock, add 10-20% additional wattage to your calculation.

Q5: What about PSU efficiency ratings?
A: This calculator gives total wattage needed. For efficiency, look for 80+ Bronze, Silver, Gold, or Platinum rated PSUs.