Best PSU for AMD Ryzen 7 7800X3D and NVIDIA GeForce RTX 4080 SUPER
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NVIDIA GeForce RTX 4080 SUPER
Configuration Analysis
System Performance Assessment
This system delivers exceptional performance in gaming and demanding applications. The Ryzen 7 7800X3D and RTX 4080 SUPER combination provides high frame rates at 1440p and 4K resolutions with ray tracing enabled. It's also well-suited for content creation tasks like video editing and 3D rendering, offering fast processing and rendering speeds.
Recommended Power Supplies
CORSAIR RM750e (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 750W Power Supply – 80 Plus Gold – Ultra Quiet – Zero RPM, PS-TPD-0750FNFAGU-P
The Thermaltake GF1 750W Gold provides ample, efficient power for your 7800X3D/4080 SUPER combo, plus full modularity for a clean build.
MSI MAG A750GL PCIE 5.1 & ATX 3.1 Gaming Power Supply – Full Modular – 80 Plus Gold Certified 750W – Compact Size – ATX PSU – 10 Year Warranty
The MSI MAG A750GL's ATX 3.1 & PCIe 5.1 support ensures reliable power delivery for your 7800X3D/4080 SUPER, with headroom to spare and a 10-year warranty!
Comparison Table
| Model | Wattage | Efficiency | Form Factor | Modularity | Price | Best For |
|---|---|---|---|---|---|---|
| CORSAIR RM750e (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 | 750W | 80+ Gold | ATX | Full-Modular | $99.99 | Overall Value |
| Thermaltake GF1 (2024) Fully Modular ATX 750W Power Supply – 80 Plus Gold – Ultra Quiet – Zero RPM, PS-TPD-0750FNFAGU-P | 750W | 80+ Gold | ATX | Full-Modular | $81.99 | Energy Efficiency |
| MSI MAG A750GL PCIE 5.1 & ATX 3.1 Gaming Power Supply – Full Modular – 80 Plus Gold Certified 750W – Compact Size – ATX PSU – 10 Year Warranty | 750W | 80+ Gold | ATX | Full-Modular | $94.99 | Energy Efficiency |
Why This Wattage?
Power Calculation
The recommended PSU wattage is calculated based on the total power draw of your CPU (AMD Ryzen 7 7800X3D) and GPU (NVIDIA GeForce RTX 4080 SUPER), 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 or Ryzen Master to limit the CPU's power consumption and reduce heat output during less demanding tasks.
Utilize NVIDIA's GeForce Experience or NVIDIA Control Panel to optimize game settings for efficiency, balancing visual quality and power usage.
Consider undervolting the GPU slightly to reduce power consumption without significantly impacting performance, improving thermal efficiency.
Special Installation Note
Ensure the PSU's 12V-2×6 (or ATX 3.0/PCIe 5.0) connector is directly connected to the RTX 4080 SUPER, instead of using adapters, to ensure stable power delivery and prevent potential issues.
Usage Scenarios
AAA Gaming
Effortlessly plays the latest AAA games at maximum settings, high resolutions (1440p or 4K), and buttery smooth frame rates.
Content Creation
Handles video editing, 3D rendering, and graphic design tasks with ease, delivering fast processing and rendering times.
AI Development
Capable of running and training moderately complex AI models, benefiting from the powerful CPU and GPU for accelerated performance.
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 4080 SUPER 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 RM750e offers ample, stable power for your 7800X3D/4080 SUPER, with ATX 3.1/PCIe 5.1 ensuring compatibility and future-proofing.