Best PSU for Ryzen Threadripper PRO 9995WX & RTX 5090
Ultimate workstation for 8K video editing, AI training, and extreme gaming performance.
1500W
1050W
70%
Enthusiast
🏆 Recommended Power Supplies
Hand-picked for your 1500W target — sorted by overall value.
CORSAIR HX1500i (2025) Fully Modular Ultra-Low Noise ATX Power Supply with 12V-2×6 Cable u2013 ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Platinum Efficiency, Fluid Dynamic Bearing Fan u2013 Black
ATX 3.1 ready with excellent digital monitoring via iCUE software.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$341.35
be quiet! Straight Power 12-1500w Modular Power Supply | 80 Plus Platinum ATX 3.1 Compliant | for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors | Silent 135mm Fan | BN518
Reliable Platinum efficiency and exceptionally quiet operation for workstations.
Efficiency80+ Gold
FormATX
CablesNon-Modular
Price$260.91
NZXT C1500 Platinum ATX 3.1 | Fully Modular Low-Noise PC Gaming Power Supply | 1500 Watts | 80 Plus Platinum| Dual 12V-2×6 Connectors | Zero Fan Mode | 100% Japanese Capacitors | Black
Dual 12V-2×6 connectors provide excellent future-proofing for high-power GPUs.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$349.99
Seasonic Prime TX 1600W Power Supply ATX 3.1 PCIe 5.1 (12V-2×6) 12 Years Warranty Cybenetics Titanium A Fully Modular RTX 5090 AMD RX 9000 Ready AI Workstation
Want extra headroom for future GPU upgrades or overclocking? This 1600W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$559.99
Amazon.com prices as of 03/23/2026 16:39 GMT+0000 —
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📊 Quick Comparison
See the key differences at a glance.
| # | Model | Wattage | Efficiency | Modular | Price |
|---|---|---|---|---|---|
| 1 | CORSAIR HX1500i (2025) Fully Modular Ultra-Low Noise ATX Power Supply with 12V-2×6 Cable u2013 ATX 3.1 & PCIe 5.1 Compliant, Cybenetics Platinum Efficiency, Fluid Dynamic Bearing Fan u2013 Black | 1500W | 80+ Gold | Full-Modular | $349.99 |
| 2 | be quiet! Straight Power 12-1500w Modular Power Supply | 80 Plus Platinum ATX 3.1 Compliant | for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors | Silent 135mm Fan | BN518 | 1500W | 80+ Gold | Non-Modular | $260.91 |
| 3 | NZXT C1500 Platinum ATX 3.1 | Fully Modular Low-Noise PC Gaming Power Supply | 1500 Watts | 80 Plus Platinum| Dual 12V-2×6 Connectors | Zero Fan Mode | 100% Japanese Capacitors | Black | 1500W | 80+ Gold | Full-Modular | $349.99 |
| ⬆️ | Seasonic Prime TX 1600W Power Supply ATX 3.1 PCIe 5.1 (12V-2×6) 12 Years Warranty Cybenetics Titanium A Fully Modular RTX 5090 AMD RX 9000 Ready AI Workstation Upgrade | 1600W | 80+ Gold | Full-Modular | $559.99 |
🔌 Power Budget
Your system uses 70% of the recommended PSU output — well within the efficient operating range.
1500W (Recommended)
System draw: 1050W
Headroom: 450W (30%)
💡 Why 1500W?
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
Use a 240V circuit for maximum efficiency.
Enable zero-RPM fan modes for silent idle operation.
🎯 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
Ensure the 12V-2×6 cable is fully seated to prevent connector damage.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.