Best PSU for Core i5-14600KF & RTX 5090
Your Intel Core i5-14600KF and NVIDIA GeForce RTX 5090 configuration offers good performance for everyday tasks and casual gaming. This mainstream system is suitable for 1080p gaming, office work, and basic content creation.
1200W
825W
69%
Mainstream
🏆 Recommended Power Supplies
Hand-picked for your 1200W target — sorted by overall value.
ASUS TUF Gaming 1200W Gold (1200 Watt, ATX 3.0 Compatible Fully Modular Power Supply, 80+ Gold Certified, Military-Grade Components, Dual Ball Bearing, Axial-tech Fan, PCB Coating, 10 Year Warranty)
Excellent efficiency rating, ideal for extended use with this Intel Core i5-14600KF and NVIDIA GeForce RTX 5090 configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$204.99
Corsair RM1200x Shift Fully Modular ATX Power Supply – Side Interface – ATX 3.1 & PCIe 5.1 Compliant – Zero RPM Fan Mode – 105u00b0C-Rated Capacitors – 80 Plus Gold Efficiency – Black
Excellent efficiency rating, ideal for extended use with this Intel Core i5-14600KF and NVIDIA GeForce RTX 5090 configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$194.99
be quiet! Pure Power 12 M 1200W Modular Power Supply | 80 Plusu00ae Gold | ATX 3.1 | PCIe 5.0 GPUs and 6+2 pin connectors | 12VHPWR Cable Included | Silent 120mm be quiet! Fan – BN513 I 10 Year Warranty
Excellent efficiency rating, ideal for extended use with this Intel Core i5-14600KF and NVIDIA GeForce RTX 5090 configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$179.90
CORSAIR HX1500i Shift Fully Modular ATX Power Supply u2013 Built-in iCUE Link System Hub, Dual Native 12V-2×6 Cable, ATX 3.1 & PCIe 5.1, Side-Mounted Connectors, Cybenetics Platinum u2013 Black
Want extra headroom for future GPU upgrades or overclocking? This 1500W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$449.99
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📊 Quick Comparison
See the key differences at a glance.
| # | Model | Wattage | Efficiency | Modular | Price |
|---|---|---|---|---|---|
| 1 | ASUS TUF Gaming 1200W Gold (1200 Watt, ATX 3.0 Compatible Fully Modular Power Supply, 80+ Gold Certified, Military-Grade Components, Dual Ball Bearing, Axial-tech Fan, PCB Coating, 10 Year Warranty) | 1200W | 80+ Gold | Full-Modular | $204.99 |
| 2 | Corsair RM1200x Shift Fully Modular ATX Power Supply – Side Interface – ATX 3.1 & PCIe 5.1 Compliant – Zero RPM Fan Mode – 105u00b0C-Rated Capacitors – 80 Plus Gold Efficiency – Black | 1200W | 80+ Gold | Full-Modular | $194.99 |
| 3 | be quiet! Pure Power 12 M 1200W Modular Power Supply | 80 Plusu00ae Gold | ATX 3.1 | PCIe 5.0 GPUs and 6+2 pin connectors | 12VHPWR Cable Included | Silent 120mm be quiet! Fan – BN513 I 10 Year Warranty | 1200W | 80+ Gold | Full-Modular | $179.90 |
| ⬆️ | CORSAIR HX1500i Shift Fully Modular ATX Power Supply u2013 Built-in iCUE Link System Hub, Dual Native 12V-2×6 Cable, ATX 3.1 & PCIe 5.1, Side-Mounted Connectors, Cybenetics Platinum u2013 Black Upgrade | 1500W | 80+ Gold | Full-Modular | $449.99 |
🔌 Power Budget
Your system uses 69% of the recommended PSU output — well within the efficient operating range.
1200W (Recommended)
System draw: 825W
Headroom: 375W (30%)
💡 Why 1200W?
Power Calculation
CPU + GPU draw, plus ~100W for motherboard, RAM, fans, and storage.
30% Headroom
Extra capacity absorbs transient power spikes, keeps efficiency in the sweet spot, and leaves room for future upgrades.
80 Plus Efficiency
We only recommend certified PSUs. Higher ratings mean less wasted energy, lower heat, and quieter fans.
🌿 Power Efficiency Tips
Enable Windows/OS power saving features when not gaming to reduce power consumption and heat output.
Close background applications when gaming to free up system resources and reduce power consumption.
Schedule regular dust cleaning to maintain efficient cooling and lower power requirements.
🎯 What This Build Can Do
Gaming
Suitable for modern games with good performance based on your system configuration.
Productivity
Great for office work, multitasking, and everyday computing tasks.
Content Creation
Can handle basic video editing and content creation workflows.
🔧 Installation Guide
Quick Checklist
- Mount the PSU with its fan aligned to your case airflow.
- Only connect cables you actually need (modular PSUs).
- Use dedicated PCIe power cables for NVIDIA GeForce RTX 5090 — no daisy-chaining.
- Boot-test with side panel open before final assembly.
⚠️ Special Note
For your high-wattage PSU, ensure your case has good bottom ventilation. Some 1000W+ PSUs are longer than standard units, so verify case compatibility before purchasing.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.