Seasonic Wattage Formula:
The Seasonic Wattage Calculator helps determine the appropriate power supply unit (PSU) wattage for your computer system based on component power requirements. It follows Seasonic's recommended methodology of summing component wattages and applying a safety factor.
The calculator uses the Seasonic formula:
Where:
Explanation: The safety factor ensures your PSU operates efficiently and has headroom for power spikes and potential upgrades.
Details: An appropriately sized PSU ensures system stability, improves efficiency, reduces heat output, and provides room for future upgrades. Undersized PSUs can cause crashes and component damage.
Tips: Enter each component's typical power draw (check manufacturer specs). Use 1.2 safety factor for standard systems, 1.3 for high-performance systems or planned upgrades.
Q1: Where can I find component wattage information?
A: Check manufacturer specifications (TDP for CPUs, power requirements for GPUs). Many online databases compile this information.
Q2: Why the safety factor?
A: Components occasionally spike above their rated power draw. The safety factor prevents overloading and maintains efficiency.
Q3: Should I round up to available PSU wattages?
A: Yes, choose the next available standard PSU wattage above your calculated value (e.g., if you get 543W, choose 550W or 600W).
Q4: Does this account for overclocking?
A: No. If overclocking, add 20-30% to the component's rated power before calculation.
Q5: How accurate is this calculator?
A: It provides a good estimate. For precise measurements, use a power meter on your actual system.