Best PSU for Intel Core i9-14900KF and AMD Radeon RX 9070 XT
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AMD Radeon RX 9070 XT
Configuration Analysis
System Performance Assessment
This system, featuring a Core i9-14900KF and Radeon RX 9070 XT, is designed for enthusiast-level gaming, content creation, and demanding workloads. Expect ultra-high frame rates at 1440p and 4K resolutions in most games. It will handle video editing, 3D rendering, and other resource-intensive tasks with ease due to the powerful CPU and GPU combination.
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 has the power and efficiency your i9/RX 9070 XT need, and full modularity keeps things tidy!
ARESGAME AGV Series 750W Power Supply, 80 Plus Bronze Certified, Semi Modular Power Supply, 5 Year Warranty
The ARESGAME 750W is a solid choice; its Bronze rating and semi-modular design offer reliable power and clean cabling for your i9 and RX 9070 XT.
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 |
| ARESGAME AGV Series 750W Power Supply, 80 Plus Bronze Certified, Semi Modular Power Supply, 5 Year Warranty | 750W | 80+ Gold | ATX | Semi-Modular | $54.9 | Energy Efficiency |
Why This Wattage?
Power Calculation
The recommended PSU wattage is calculated based on the total power draw of your CPU (Intel Core i9-14900KF) and GPU (AMD Radeon RX 9070 XT), 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 Radeon Chill to limit frame rates during less demanding scenes, reducing power consumption and heat generation.
Utilize Intel's Speed Shift technology to allow the CPU to dynamically adjust its frequency based on workload, optimizing power usage.
Consider undervolting both the CPU and GPU. This can significantly reduce power consumption while maintaining similar performance levels through tuning.
Special Installation Note
Ensure the 12VHPWR (or 12V-2×6) cable from your PSU is firmly connected to the RX 9070 XT. A loose connection can lead to system instability or even damage to the GPU or PSU.
Usage Scenarios
AAA Gaming
This PC can handle the latest AAA games at maximum settings with high frame rates and resolutions, including ray tracing.
Video Editing
Effortlessly edit and render high-resolution video projects, including 4K and 8K footage, with fast processing and smooth playback.
AI Development
Train and run complex AI models with the powerful CPU and GPU, accelerating machine learning tasks and data analysis workflows.
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 AMD Radeon RX 9070 XT 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's ATX 3.1 and PCIe 5.1 compliance is perfect for your 14900KF and RX 9070 XT, ensuring stable power and future compatibility.