Best PSU for AMD Ryzen 7 9800X3D and NVIDIA GeForce RTX 5080
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NVIDIA GeForce RTX 5080
Configuration Analysis
System Performance Assessment
This system is a high-end gaming and workstation powerhouse. The Ryzen 7 9800X3D and RTX 5080 can handle any modern game at maximum settings with high frame rates, even at 4K resolution. It will also excel in demanding applications like video editing, 3D rendering, and scientific simulations due to the powerful CPU and GPU.
Recommended Power Supplies
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
Thermaltake GF1 (2024) Fully Modular ATX 850W Power Supply – 80 Plus Gold – Ultra Quiet – Zero RPM, PS-TPD-0850FNFAGU-P
The Thermaltake GF1's 850W Gold rating and full modularity are perfect for powering your 9800X3D and RTX 5080 with headroom to spare and clean cable management.
ARESGAME AGT Series 850W Power Supply, 80+ Gold Certified, Fully Modular, FDB Fan, Compact 140mm Size, 10 Year Warranty, ATX Gaming Power Supply
The ARESGAME 850W Gold is perfect! Fully modular for clean build, 10-year warranty offers peace of mind powering your 9800X3D and RTX 5080.
Comparison Table
| Model | Wattage | Efficiency | Form Factor | Modularity | Price | Best For |
|---|---|---|---|---|---|---|
| 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 | $125.29 | Overall Value |
| 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 | $109.99 | Energy Efficiency |
| ARESGAME AGT Series 850W Power Supply, 80+ Gold Certified, Fully Modular, FDB Fan, Compact 140mm Size, 10 Year Warranty, ATX Gaming Power Supply | 850W | 80+ Gold | ATX | Full-Modular | $86.98 | Energy Efficiency |
Why This Wattage?
Power Calculation
The recommended PSU wattage is calculated based on the total power draw of your CPU (AMD Ryzen 7 9800X3D) 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 for the CPU to reduce power consumption during less demanding tasks without significantly impacting performance.
Utilize NVIDIA's GeForce Experience to optimize game settings for the best balance between visual quality and power efficiency.
Consider undervolting the GPU slightly to lower temperatures and power draw without sacrificing performance, particularly during extended gaming sessions.
Special Installation Note
Ensure the 12V-2×6 cable is securely connected from the chosen PSU directly to the RTX 5080. Avoid using any adapters or splitters, as this could lead to instability or damage due to the high power draw of the GPU.
Usage Scenarios
AAA Gaming
Effortlessly handles the latest AAA titles at maximum settings, achieving high framerates and stunning visuals even in demanding games.
Video Editing
Quickly renders high-resolution video projects, handles complex effects smoothly, and enables real-time 4K editing without lag.
AI Development
Trains complex AI models efficiently, accelerates machine learning tasks, and handles large datasets for advanced research and development.
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 RM850e's ATX 3.1/PCIe 5.1 compliance and 850W give you headroom for the 5080 and 9800X3D, plus future upgrades!