Profitability & Strategy
Best Power Supplies for Crypto Mining Rigs in 2025
Best Power Supplies for Crypto Mining Rigs in 2025
Most miners running multiple GPUs hit efficiency walls and stability issues when their power supply cannot sustain continuous loads above 1200W. The units that hold up best this year deliver 80 Plus Platinum or Titanium ratings, come with 1600W to 2000W continuous output, and use fully modular cabling so you only run the lines you need.
Practical choices for 6- to 12-GPU rigs
Start by matching PSU capacity to your actual draw. A rig with six RTX 3080 cards pulls roughly 1400W at the wall under load. Add headroom for spikes and future cards, and you land on 1800W units. Lower wattage supplies force you to run two PSUs in parallel, which adds failure points and extra heat.
| Model | Rating | Continuous Watts | Best for | Notes |
|---|---|---|---|---|
| Seasonic Prime TX-1600 | Titanium | 1600W | 8-GPU Ethereum or Kaspa rigs | Single 12V rail, 10-year warranty |
| Corsair AX1600i | Titanium | 1600W | Variable loads | Digital monitoring via software |
| EVGA SuperNOVA 2000 T2 | Titanium | 2000W | 10-plus GPU farms | Requires 20A circuit per unit |
- Check that the unit has at least four 8-pin CPU connectors repurposed for PCIe power when needed.
- Verify the fan curve stays quiet below 60% load. Mining rooms often run 24/7, so noise compounds fast.
- Measure input voltage at the outlet. Titanium units lose less than 4% efficiency at 10% load, which matters when rigs idle overnight.
Buy from vendors that stock replacement cables separately. A single missing 6+2 pin lead can force you to shut down an entire rig until a new cable arrives. Seasonic and Corsair both sell individual cables by part number, which keeps downtime short when something wears out.
