PC Power Supply Wattage Calculator Newegg

Newegg Power Supply Calculation:

\[ P_{total} = \Sigma P_{components} \times (1.2 \text{ to } 1.3) \]

CPU Wattage:

watts

GPU Wattage:

watts

RAM Wattage:

watts

Storage Wattage:

watts

Other Components:

watts

Safety Factor:

Recommended Power Supply Wattage:

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1. What is the Newegg Power Supply Calculator?

The Newegg Power Supply Calculator helps determine the appropriate wattage for your PC's power supply unit (PSU) based on your system components. It follows Newegg's methodology of summing component wattages and applying a safety factor.

2. How Does the Calculator Work?

The calculator uses the Newegg power supply formula:

\[ P_{total} = \Sigma P_{components} \times (1.2 \text{ to } 1.3) \]

Where:

\( P_{components} \) — Sum of all component power requirements (CPU, GPU, RAM, storage, etc.)
\( 1.2 \) — Standard safety factor (20% headroom)
\( 1.3 \) — Recommended safety factor for high-end systems (30% headroom)

Explanation: The safety factor accounts for power spikes, future upgrades, and PSU efficiency over time.

3. Importance of Proper PSU Sizing

Details: An appropriately sized PSU ensures system stability, prevents crashes, improves efficiency, and allows for future upgrades. Undersized PSUs can cause system instability and component damage.

4. Using the Calculator

Tips: Enter each component's typical power draw in watts. For high-end gaming PCs or workstations, use the 1.3 safety factor. Check manufacturer specifications for accurate component power requirements.

5. Frequently Asked Questions (FAQ)

Q1: Why is a safety factor needed?
A: Components can have power spikes above their rated TDP, and PSUs lose some capacity over time. The safety factor ensures stable operation.

Q2: How do I find my components' power requirements?
A: Check manufacturer specifications (TDP for CPU/GPU), or use online databases like PCPartPicker for common components.

Q3: Should I get a higher wattage PSU than calculated?
A: It's often wise to round up to the nearest standard PSU wattage (e.g., 550W → 650W) for future upgrades and better efficiency.

Q4: Does PSU efficiency rating affect this calculation?
A: No, efficiency (80 Plus rating) affects power draw from the wall, not the power delivered to components. This calculator gives the required output wattage.

Q5: What about multiple GPUs?
A: Add each GPU's power requirement separately. For SLI/CrossFire systems, consider an additional 10-20% overhead beyond simple summation.