PC Power Supply & Wattage Calculator
Accurately calculate power requirements for your custom PC build. Accurately measure transient voltage spikes, peak wattage, and 80 PLUS efficiency headroom across Intel Core, AMD Ryzen, and NVIDIA RTX graphics cards.
Processor (CPU)
Select manufacturer (Intel/AMD), series, and processor model
+20% additional wattage
Graphics Card (GPU)
Graphics card power consumption is the largest factor in PC wattage
+15% Power
Motherboard Form Factor
Memory (RAM)
Storage & Cooling System
Case Fans, Lighting & Peripherals
Please Select Components
To calculate your PC's power consumption and recommended PSU wattage, please select your Processor (CPU) or Graphics Card (GPU) from the left panel.
Click to instantly view real-time wattage for a popular Core i7 + RTX 4070 Super configuration
Maintains peak efficiency zone () with .
Fahim Chowdhury
Lab SupportSystem Optimizer & Power Engineer, Pixahunt Lab
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Recommended Power Supplies for Your Build
100% compatible power supplies matching your estimated build
PSU recommendations will load once components are selected
Select your processor and graphics card to instantly view official 80 PLUS certified power supplies tailored to your system's peak wattage.
Power Supply Guide & Engineering Knowledge Hub
Why do you need 20% - 30% Headroom?
Power supplies operate at peak efficiency and lowest noise between 50% and 60% load. Extra headroom extends capacitor lifespan and prevents sudden reboots during intense gaming transients.
What is ATX 3.0 and 12V-2x6?
Modern RTX 40 and 50 series cards generate transient power spikes up to 200% in milliseconds. ATX 3.0 rated PSUs safely deliver up to 600W power through a single native cable without failure-prone adapters.
80 PLUS Bronze vs Gold
80 PLUS certification measures what percentage of wall power is delivered to the PC rather than wasted as heat. Gold rating lowers electricity bills, runs cooler, and keeps fan curves quieter.
⚡ 80 PLUS Efficiency Certification Matrix
Wall-to-component energy efficiency percentage across 115V/230V internal load levels
| Tier / রেটিং | 20% Load | 50% Load (Optimal) | 100% Full Load | Recommended Use Case |
|---|---|---|---|---|
| 80 PLUS Standard / White | 80% | 80% | 80% | Office PC, Basic Multimedia |
| 80 PLUS Bronze | 82% | 85% | 82% | Budget Gaming (GTX 1650, RTX 3050, RX 6600) |
| 80 PLUS Silver | 85% | 88% | 85% | Mid-Range Gaming & Modest Workstations |
| 80 PLUS Gold (Industry Benchmark) | 87% | 90% | 87% | High-End Gaming (RTX 4070/4080, RX 7800/7900) |
| 80 PLUS Platinum | 90% | 92% | 89% | Flagship Gaming & 24/7 Render Rigs (RTX 4090 / 5090) |
| 80 PLUS Titanium | 92% | 94% | 90% | Enterprise AI, Dual-GPU Workstations & Servers |
🎯 GPU Wattage & Transient Spike Advisory Matrix
Real-world TDP, transient power surge tolerance, and minimum recommended PSU wattage
NVIDIA GeForce RTX 5090 / 4090
450W - 600W TDP with 800W+ transient microspikes. Requires native ATX 3.0 with dedicated 12V-2x6 cable.
RTX 5080 / 4080 Super / RX 7900 XTX
320W - 400W TDP. High load spikes during ray tracing. ATX 3.0 Gold/Platinum strongly advised.
RTX 4070 Ti Super / RX 7900 XT
285W - 315W TDP. Pairs excellently with 80 PLUS Gold 750W power supply for maximum efficiency.
RTX 4070 Super / RX 7800 XT
220W - 263W TDP. 650W provides plenty of room for Ryzen 7 / Core i7 CPUs and dual M.2 NVMe SSDs.
RTX 4060 Ti / RX 7600 XT
160W - 190W TDP. High power efficiency. Reliable 550W 80 PLUS Bronze or Gold handles it with ease.
RTX 4060 / RX 6600 / Ryzen APUs
65W - 130W TDP. Modest energy demands. 450W-550W PSU ensures silent operation and upgrade headroom.
Power Supply & Wattage Frequently Asked Questions
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