Best PSU for AMD Ryzen 7 9800X3D and NVIDIA GeForce RTX 4090
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NVIDIA GeForce RTX 4090
Configuration Analysis
System Performance Assessment
This system, featuring a Ryzen 9800X3D and RTX 4090, delivers exceptional performance. Expect to max out virtually any game at 4K resolution with ray tracing enabled. Demanding workloads like video editing, 3D rendering, and scientific simulations will also be handled with ease, making it a top-tier workstation and gaming rig.
Recommended Power Supplies
CORSAIR RM1000e (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
CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2×6 Connector – Black
The RM1000x's 1000W, ATX 3.1, and PCIe 5.1 support are perfect for your 4090 and Ryzen 9800X3D, ensuring stable power delivery for years to come.
NZXT C1000 Gold ATX 3.1 – Fully Modular Low-Noise PC Gaming Power Supply – 1000 Watts – 80 Plus Gold – 12V-2×6 Connector – Zero Fan Mode – 100% Japanese Capacitors – Black
The NZXT C1000 Gold's 1000W and 12V-2×6 connector are perfect for reliably powering your hungry 4090 and 9800X3D.
Comparison Table
| Model | Wattage | Efficiency | Form Factor | Modularity | Price | Best For |
|---|---|---|---|---|---|---|
| CORSAIR RM1000e (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 | 1000W | 80+ Gold | ATX | Full-Modular | $169.99 | Overall Value |
| CORSAIR RM1000x Fully Modular Low-Noise ATX Power Supply – ATX 3.1 Compliant – PCIe 5.1 Support – Cybenetics Gold Efficiency – Native 12V-2×6 Connector – Black | 1000W | 80+ Gold | ATX | Full-Modular | $189.99 | Energy Efficiency |
| NZXT C1000 Gold ATX 3.1 – Fully Modular Low-Noise PC Gaming Power Supply – 1000 Watts – 80 Plus Gold – 12V-2×6 Connector – Zero Fan Mode – 100% Japanese Capacitors – Black | 1000W | 80+ Gold | ATX | Full-Modular | $176.99 | 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 9800X3D) and GPU (NVIDIA GeForce RTX 4090), 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
Utilize the GPU's power limit features to reduce wattage consumption without significantly impacting performance in most games.
Enable AMD's Eco Mode or similar CPU power-saving profiles when not performing intensive tasks to lower CPU power draw.
Monitor PSU fan noise and adjust fan curves within the BIOS or PSU software to balance cooling and acoustic performance.
Special Installation Note
Ensure the 12V-2×6 cable is securely connected to the RTX 4090, fully seated in both the PSU and GPU connectors, to avoid power delivery issues or damage.
Usage Scenarios
Gaming Domination
This PC obliterates any game at maximum settings, including ray tracing, delivering unparalleled frame rates at 4K and beyond. Enjoy smooth, immersive gameplay.
Content Creation
Effortlessly handles 8K video editing, complex 3D rendering, and demanding visual effects workflows, accelerating creative processes and maximizing productivity.
AI Research
Accelerates machine learning tasks, AI model training, and data analysis, enabling faster experimentation and breakthroughs in artificial intelligence 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 4090 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 RM1000e has the wattage and PCIe 5.1 for your 4090 and 9800X3D, plus headroom and reliability for years to come.