1. What is PSU Wattage Calculation?

The PSU (Power Supply Unit) wattage calculator estimates the power requirements for a custom gaming PC build, adding a safety margin to ensure stable operation and future upgrades.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( P_{CPU} \) — Processor power consumption (TDP)
• \( P_{GPU} \) — Graphics card power consumption
• \( P_{RAM} \) — Memory modules power
• \( P_{Storage} \) — SSDs/HDDs power
• \( P_{Other} \) — Other components (fans, RGB, etc.)
• Safety Factor — 1.3x to 1.5x multiplier for headroom

Explanation: The safety factor accounts for power spikes, efficiency losses, and future upgrades.

3. Importance of Proper PSU Sizing

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

4. Using the Calculator

Tips: Enter component wattages based on manufacturer specifications. For GPUs/CPUs, use TDP values. Choose higher safety margin for overclocking or future upgrades.

5. Frequently Asked Questions (FAQ)

Q1: Why use a safety margin?
A: Components often draw more power than their rated TDP during peak loads. The margin prevents instability and allows for future upgrades.

Q2: What if my exact PSU wattage isn't available?
A: Always round up to the nearest standard PSU wattage (e.g., if calculation is 520W, get a 550W or 600W PSU).

Q3: Does PSU efficiency affect this calculation?
A: No, efficiency (80 Plus rating) affects power draw from the wall, not the capacity needed for components.

Q4: Should I account for overclocking?
A: Yes, if overclocking, use the higher safety factor (1.5x) or manually add 20-30% to CPU/GPU wattage.

Q5: What about multiple GPUs?
A: Add each GPU's wattage separately. For SLI/CrossFire, add 50-100% extra depending on configuration.