Best PSU for Core i9-14900K & RTX 4080 SUPER
Your Intel Core i9-14900K and NVIDIA GeForce RTX 4080 SUPER combination delivers exceptional performance for demanding workloads. This enthusiast-grade system can handle 4K gaming at high framerates, intensive content creation, and professional workloads simultaneously.
750W
545W
73%
Enthusiast
🏆 Recommended Power Supplies
Hand-picked for your 750W target — sorted by overall value.
CORSAIR RM750e ATX 3.1 PCIe 5.1 Ready Fully Modular 750W Power Supply – 12V-2×6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
Excellent efficiency rating, ideal for extended use with this Intel Core i9-14900K and NVIDIA GeForce RTX 4080 SUPER configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$89.99
MSI MAG A750GL PCIE5, Fully Modular Compact Gaming 750W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty
Excellent efficiency rating, ideal for extended use with this Intel Core i9-14900K and NVIDIA GeForce RTX 4080 SUPER configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$95.99
Rosewill VMG 750W 80+ Gold, ATX 3.0 & 3.1 Compatible, Full Modular Low-Noise Power Supply, PCIe 5.1 12V-2×6 Connector, 100% Japanese Electrolytic Capacitor, 120mm FDB Silent Fan – 5 Year Warranty
Excellent efficiency rating, ideal for extended use with this Intel Core i9-14900K and NVIDIA GeForce RTX 4080 SUPER configuration.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$69.98
CORSAIR RM850e ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – 12V-2×6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black
Want extra headroom for future GPU upgrades or overclocking? This 850W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$124.99
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📊 Quick Comparison
See the key differences at a glance.
| # | Model | Wattage | Efficiency | Modular | Price |
|---|---|---|---|---|---|
| 1 | CORSAIR RM750e ATX 3.1 PCIe 5.1 Ready Fully Modular 750W Power Supply – 12V-2×6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black | 750W | 80+ Gold | Full-Modular | $89.99 |
| 2 | MSI MAG A750GL PCIE5, Fully Modular Compact Gaming 750W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty | 750W | 80+ Gold | Full-Modular | $95.99 |
| 3 | Rosewill VMG 750W 80+ Gold, ATX 3.0 & 3.1 Compatible, Full Modular Low-Noise Power Supply, PCIe 5.1 12V-2×6 Connector, 100% Japanese Electrolytic Capacitor, 120mm FDB Silent Fan – 5 Year Warranty | 750W | 80+ Gold | Full-Modular | $69.98 |
| ⬆️ | CORSAIR RM850e ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – 12V-2×6 Cable Included, Cybenetics Gold Efficiency, 105°C-Rated Capacitors, Modern Standby Mode – Black Upgrade | 850W | 80+ Gold | Full-Modular | $124.99 |
🔌 Power Budget
Your system uses 73% of the recommended PSU output — well within the efficient operating range.
750W (Recommended)
System draw: 545W
Headroom: 205W (30%)
💡 Why 750W?
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.
Consider investing in a high-quality UPS to protect your high-end components from power surges and outages.
Monitor component temperatures and adjust fan curves for optimal balance between cooling performance and noise.
🎯 What This Build Can Do
4K Gaming
Your system can handle 4K gaming at high frame rates with max settings in most modern titles.
Content Creation
Perfect for video editing, 3D rendering, and streaming simultaneously.
Multi-tasking
Run multiple demanding applications simultaneously without performance drops.
🔧 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 4080 SUPER — no daisy-chaining.
- Boot-test with side panel open before final assembly.
⚠️ Special Note
Your NVIDIA GeForce RTX 4080 SUPER requires the new 12VHPWR power connector. Ensure your PSU includes this connector or use the appropriate adapter, and make sure it's fully inserted to prevent connection issues.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.