Best PSU for Ryzen 7 9800X3D & RTX 3070 Ti
An excellent high-end gaming build. The top-tier 9800X3D CPU maximizes frame rates, while the 3070 Ti delivers strong 1440p performance.
750W
510W
68%
High-end
🏆 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
Gold efficiency and modular cables keep this high-end build clean and running cool.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$89.99
MSI MAG A750BN PCIE5 III, Non Modular Gaming 750W Power Supply, 80+ Bronze, Dual 12V-2×6 Cables, Server-Grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 5 Year Warranty
Budget-friendly 750W option with ATX 3.1 support, though Bronze efficiency is less ideal here.
Efficiency80+ Bronze
FormATX
CablesNon-Modular
Price$79.99
be quiet! Pure Power 13 M 750W Power Supply, 80 Plus® Gold Certification, ATX 3.1 PSU, Support for PCIe 5.1 GPUs, semi-Passive 120mm be quiet! Fan, LLC Technology, Single Rail, for Overclocked GPUs
High-quality Gold efficiency and ATX 3.1 compliance ensure stable power delivery for transient spikes.
Efficiency80+ Gold
FormATX
CablesNon-Modular
Price$89.90
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
Want extra headroom for future GPU upgrades or overclocking? This 850W unit gives you peace of mind.
Efficiency80+ Gold
FormATX
CablesFull-Modular
Price$109.99
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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 | $93.00 |
| 2 | MSI MAG A750BN PCIE5 III, Non Modular Gaming 750W Power Supply, 80+ Bronze, Dual 12V-2×6 Cables, Server-Grade Capacitor, ATX 3.1 & PCIe 5.1 Ready, Low-Noise, Semi Digital, 5 Year Warranty | 750W | 80+ Bronze | Non-Modular | $59.70 |
| 3 | be quiet! Pure Power 13 M 750W Power Supply, 80 Plus® Gold Certification, ATX 3.1 PSU, Support for PCIe 5.1 GPUs, semi-Passive 120mm be quiet! Fan, LLC Technology, Single Rail, for Overclocked GPUs | 750W | 80+ Gold | Non-Modular | $89.90 |
| ⬆️ | 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 Upgrade | 850W | 80+ Gold | Full-Modular | $109.99 |
🔌 Power Budget
Your system uses 68% of the recommended PSU output — well within the efficient operating range.
750W (Recommended)
System draw: 510W
Headroom: 240W (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
Undervolt the RTX 3070 Ti to reduce power draw and heat.
Enable AMD Eco Mode to optimize CPU power efficiency.
🎯 What This Build Can Do
Competitive Esports
Achieve maximum frame rates in CPU-bound competitive shooters at 1080p and 1440p.
1440p AAA Gaming
Play modern graphic-intensive titles smoothly at high settings with stable frame times.
Streaming and Creation
Broadcast high-quality streams while gaming, leveraging the powerful CPU and NVENC encoder.
🔧 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 3070 Ti — no daisy-chaining.
- Boot-test with side panel open before final assembly.
⚠️ Special Note
Route modular cables before mounting the PSU to save space in the shroud.
🔗 Explore More Builds
See PSU recommendations for other CPU + GPU combinations.