Best PSU for AMD Ryzen 7 9700X and NVIDIA GeForce RTX 5090
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NVIDIA GeForce RTX 5090
Configuration Analysis
System Performance Assessment
This system, featuring a Ryzen 9700X and RTX 5090, is capable of handling any modern game at maximum settings with high refresh rates, even at 4K and ultrawide resolutions. It's also well-suited for demanding content creation tasks like video editing, 3D rendering, and AI development, offering exceptional performance across the board.
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, PCIe 5.1 support, and 12V-2×6 connector are perfect for powering your hungry RTX 5090 and Ryzen 9700X. Gold efficiency is a bonus!
Corsair RMX Series (2021), RM1000x, 1000 Watt, Gold, Fully Modular Power Supply (Renewed)
The RM1000x provides ample, stable Gold-rated power for your 9700X and RTX 5090, with headroom for future upgrades thanks to its 1000W capacity.
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 |
| Corsair RMX Series (2021), RM1000x, 1000 Watt, Gold, Fully Modular Power Supply (Renewed) | 1000W | 80+ Gold | ATX | Full-Modular | $114 | 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 9700X) and GPU (NVIDIA GeForce RTX 5090), 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 limit CPU power consumption when full performance isn't needed.
Utilize NVIDIA's power management features in the driver control panel to optimize GPU power usage based on workload.
Monitor power consumption with software like HWMonitor and adjust settings accordingly to find the optimal balance between performance and efficiency.
Special Installation Note
Ensure the 12V-2×6 connector from the PSU is directly connected to the RTX 5090, as using adapters may cause instability or damage.
Usage Scenarios
Gaming Domination
Unleash ultra-high frame rates at 4K resolution or higher, with ray tracing maxed out, in any modern game. Prepare for seamless VR experiences.
Content Creation
Effortlessly edit 8K video, render complex 3D scenes, and run demanding simulations with blazing-fast speeds and real-time previews.
AI Development
Train complex AI models quickly and efficiently, leveraging the GPU's parallel processing power for accelerated machine learning tasks and data analysis.
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 5090 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's 1000W, ATX 3.1 compliance, and PCIe 5.1 cable are perfect for handling the 5090 and 9700X's power demands reliably.