Best PSU for Core i7-14700K & RTX 5080
This build is excellent for high-refresh rate 1440p and solid 4K gaming, demanding productivity tasks, and content creation.
850W
585W
69%
High-end
🏆 Recommended Power Supplies
Hand-picked for your 850W target — sorted by overall value.
MSI MAG A850GL PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty
MSI A850GL offers ATX 3.1, PCIe 5.1 readiness, and a native 12V-2×6, ideal for the RTX 5080.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$118.99
Cooler Master MWE Gold 850 V2 Fully Modular Power Supply – 850W 80+ Gold Certified PSU, Dual EPS Connectors, Semi-Fanless Low Noise Design, Flat Black Cables, Reliable ATX Gaming PSU, 5-Year Warranty
Cooler Master MWE Gold V2 provides reliable 850W 80+ Gold power, suitable for this high-performance system.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$89.99
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
Corsair RM850x is a top-tier choice with ATX 3.1, PCIe 5.1, native 12V-2×6, and low-noise operation.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$149.99
msi MAG A1000GL PCIE5, Fully Modular Compact Gaming 1000W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty
Want extra headroom for future GPU upgrades or overclocking? This 1000W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$134.99
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📊 Quick Comparison
See the key differences at a glance.
| # | Model | Wattage | Efficiency | Modular | Price |
|---|---|---|---|---|---|
| 1 | MSI MAG A850GL PCIE5, Fully Modular Compact Gaming 850W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty | 850W | 80+ Gold | Full-Modular | $118.99 |
| 2 | Cooler Master MWE Gold 850 V2 Fully Modular Power Supply – 850W 80+ Gold Certified PSU, Dual EPS Connectors, Semi-Fanless Low Noise Design, Flat Black Cables, Reliable ATX Gaming PSU, 5-Year Warranty | 850W | 80+ Gold | Full-Modular | $89.99 |
| 3 | 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 | 850W | 80+ Gold | Full-Modular | $129.99 |
| ⬆️ | msi MAG A1000GL PCIE5, Fully Modular Compact Gaming 1000W Power Supply, 80+ Gold, ATX 3.1 & PCIe 5.1 Ready, Native Dual-Color 12V-2×6 Cable, 10 Year Warranty Upgrade | 1000W | 80+ Gold | Full-Modular | $134.99 |
🔌 Power Budget
Your system uses 69% of the recommended PSU output — well within the efficient operating range.
850W (Recommended)
System draw: 585W
Headroom: 265W (30%)
💡 Why 850W?
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 undervolting for cooler operation and power savings.
Utilize GPU power limits to optimize performance per watt.
Adjust fan curves for balanced cooling and noise efficiency.
🎯 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 5080 — no daisy-chaining.
- Boot-test with side panel open before final assembly.
⚠️ Special Note
Ensure all modular cables are fully seated into both PSU and components for stability.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.