Best PSU for Core i9-13900K & RTX 3080 Ti
This build offers exceptional gaming performance at 1440p and 4K, excelling in demanding tasks like video editing and 3D rendering.
750W
575W
77%
Enthusiast
🏆 Recommended Power Supplies
Hand-picked for your 750W target — sorted by overall value.
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
This 750W 80+ Gold unit with ATX 3.1 and native 12V-2×6 cable provides reliable, efficient power for your high-end components.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$86.99
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
A high-quality 750W 80+ Gold PSU with ATX 3.1, 12V-2×6, and robust components, ensuring stable power delivery.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$89.99
Rosewill VSB 750W 80+ Bronze, ATX 3.0 & 3.1 Compatible, Semi-Modular Power Supply, PCIe 5.1 12V-2×6 Connector, 105°C/221°F Japanese Capacitor, 120mm ICB Silent Fan – 5 Year Warranty
This 750W 80+ Bronze unit with ATX 3.1 and 12V-2×6 provides essential power, though less efficient than Gold options.
Efficiency80+ Bronze
FormATX
CablesSemi-Modular
Price$63.72
CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2×6 Connector – Black
Want extra headroom for future GPU upgrades or overclocking? This 850W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$129.99
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📊 Quick Comparison
See the key differences at a glance.
| # | Model | Wattage | Efficiency | Modular | Price |
|---|---|---|---|---|---|
| 1 | 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 | $89.99 |
| 2 | 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 | $85.99 |
| 3 | Rosewill VSB 750W 80+ Bronze, ATX 3.0 & 3.1 Compatible, Semi-Modular Power Supply, PCIe 5.1 12V-2×6 Connector, 105°C/221°F Japanese Capacitor, 120mm ICB Silent Fan – 5 Year Warranty | 750W | 80+ Bronze | Semi-Modular | $51.00 |
| ⬆️ | CORSAIR RM850x ATX 3.1 PCIe 5.1 Ready Fully Modular 850W Power Supply – Low-Noise, Cybenetics Gold Efficiency, Native 12V-2×6 Connector – Black Upgrade | 850W | 80+ Gold | Full-Modular | $129.99 |
🔌 Power Budget
Your system uses 77% of the recommended PSU output — well within the efficient operating range.
750W (Recommended)
System draw: 575W
Headroom: 175W (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 CPU power limits in BIOS for lower power consumption.
Utilize GPU undervolting to reduce power draw without significant performance loss.
🎯 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 3080 Ti — no daisy-chaining.
- Boot-test with side panel open before final assembly.
⚠️ Special Note
Ensure proper cable management for optimal airflow and aesthetics.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.