Best PSU for AMD Ryzen 9 9950X3D and NVIDIA GeForce RTX 5080
+
NVIDIA GeForce RTX 5080
Configuration Analysis
System Performance Assessment
This system, featuring a Ryzen 9 9950X3D and RTX 5080, is built for extreme performance. Expect to effortlessly handle any modern game at maximum settings, including ray tracing, at 4K resolution and beyond. Content creation tasks like video editing, 3D rendering, and complex simulations will also be completed with impressive speed and efficiency.
Recommended Power Supplies
Thermaltake GF1 (2024) Fully Modular ATX 850W Power Supply – 80 Plus Gold – Ultra Quiet – Zero RPM, PS-TPD-0850FNFAGU-P
CORSAIR RM850e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2×6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
The RM850e offers reliable power for your Ryzen 9 and RTX 5080 with headroom, future-proofed by ATX 3.1 and PCIe 5.1.
MSI MAG A850GL PCIE 5.1 & ATX 3.1 Gaming Power Supply – Full Modular – 80 Plus Gold Certified 850W – Compact Size – ATX PSU – 10 Year Warranty
The MSI MAG A850GL's PCIe 5.1 & ATX 3.1 support is perfect for your RTX 5080, and 850W provides comfortable headroom for the 9950X3D. Enjoy the 10-year warranty!
Comparison Table
| Model | Wattage | Efficiency | Form Factor | Modularity | Price | Best For |
|---|---|---|---|---|---|---|
| Thermaltake GF1 (2024) Fully Modular ATX 850W Power Supply – 80 Plus Gold – Ultra Quiet – Zero RPM, PS-TPD-0850FNFAGU-P | 850W | 80+ Gold | ATX | Full-Modular | $94.99 | Overall Value |
| CORSAIR RM850e (2025) Fully Modular Low-Noise ATX Power Supply with 12V-2×6 Cable – ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black | 850W | 80+ Gold | ATX | Full-Modular | $129.99 | Energy Efficiency |
| MSI MAG A850GL PCIE 5.1 & ATX 3.1 Gaming Power Supply – Full Modular – 80 Plus Gold Certified 850W – Compact Size – ATX PSU – 10 Year Warranty | 850W | 80+ Gold | ATX | Full-Modular | $119.99 | Energy Efficiency |
Why This Wattage?
Power Calculation
The recommended PSU wattage is calculated based on the total power draw of your CPU (AMD Ryzen 9 9950X3D) and GPU (NVIDIA GeForce RTX 5080), plus approximately 100W for other components like motherboard, memory, and storage devices.
Extra Headroom
We add an additional 30% headroom to ensure optimal efficiency, handle power spikes, and allow for future upgrades. This ensures your system runs stable and your PSU operates in its optimal efficiency range.
Efficiency Standards
We recommend power supplies with 80 Plus certification, which represents higher energy efficiency and more reliable performance. Power supplies are most efficient at 50-60% load, so having adequate headroom is important.
Power Efficiency Tips
Enable AMD's Eco Mode in the BIOS to reduce the CPU's TDP and power consumption without significantly impacting performance.
Utilize NVIDIA's GeForce Experience to optimize game settings for the best balance between visual quality and power usage.
Monitor power consumption using software like HWMonitor to identify potential power spikes or inefficiencies and adjust settings accordingly.
Special Installation Note
Given the RTX 5080's power demands, ensure the PCIe power cables are securely connected to both the GPU and the PSU, using separate cables for each connector rather than daisy-chaining, to ensure stable power delivery.
Usage Scenarios
Ultra Gaming
Effortlessly runs any modern game at maximum settings, 4K resolution, and high refresh rates, ensuring a smooth and visually stunning experience.
Content Creation
Handles demanding video editing, 3D rendering, and complex simulations with speed and efficiency, significantly reducing production times for creative professionals.
AI Development
Ideal for training machine learning models and running AI simulations, leveraging the CPU and GPU power for rapid iteration and complex problem-solving.
Installation Tips
Position Properly
Most cases have a dedicated PSU bay at the bottom. Ensure the PSU fan is facing down if your case has bottom ventilation, allowing it to draw cool air from outside.
Cable Management
With modular PSUs, connect only the cables you need. Route cables behind the motherboard tray when possible for better airflow and cleaner appearance.
Proper Connections
Ensure all power connectors are fully seated and locked. The NVIDIA GeForce RTX 5080 will require dedicated PCIe power connectors from the PSU.
Test Before Completing
Before fully closing your case, connect the essential components and test that your system boots correctly with the new power supply.
The Thermaltake GF1 850W Gold is perfect! Fully modular for clean build, and plenty of headroom for that power-hungry 5080 and 9950X3D.