PSU Wattage Calculator
Calculate your PC's power requirements and find the perfect PSU.
Enter Your PC Components
Typical: Intel i5/i7 = 65-125W, AMD Ryzen = 65-105W, High-end = 125-250W
Typical: RTX 4060 = 115W, RTX 4070 = 200W, RTX 4080 = 320W, RTX 4090 = 450W
Each stick uses approximately 3-5W
~3-5W each
~6-10W each
~2-5W each
RGB strips, controllers, USB devices, etc.
Calculating your power needs...
Minimum PSU
0W
Bare minimum to run
Recommended
BEST0W
Optimal headroom for efficiency
Future-Proof
0W
Room for upgrades
Power Breakdown
Why PSU Wattage Matters
Your Power Supply Unit (PSU) is the heart of your PC. Too weak, and your system crashes under load. Too powerful, and you're wasting money on unused capacity. Finding the sweet spot ensures stability, efficiency, and longevity.
Modern GPUs and CPUs can spike in power consumption during gaming or rendering. A quality PSU with proper headroom (20-30% above your calculated needs) ensures these spikes don't cause shutdowns or damage components.
80 PLUS Ratings
80 PLUS certification indicates efficiency. Bronze = 82-85%, Gold = 87-90%, Platinum = 90-92%, Titanium = 92-94%. Higher efficiency means less heat, lower electricity bills, and better component longevity.
Modular vs Non-Modular
Modular PSUs let you attach only the cables you need, improving airflow and aesthetics. Fully modular is best for custom builds, while semi-modular keeps essential cables attached for convenience.
Protection Features
Quality PSUs include OVP (Over Voltage), UVP (Under Voltage), OCP (Over Current), OTP (Over Temperature), and SCP (Short Circuit) protections. These safeguards prevent damage during power surges or component failures.
Single vs Multi-Rail
Single-rail PSUs deliver all power through one 12V line, simplifying distribution. Multi-rail splits power across multiple lines for added safety, preventing one component from drawing too much current.
Don't Cheap Out on Your PSU
A failing PSU can fry your entire system. Invest in a reputable brand with proper certifications. The PSUs below are tested, reliable, and offer excellent value for their wattage ratings.
Frequently Asked Questions
Recommended Power Supplies
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