Arc B580 power supply requirements
The Intel Arc B580 is rated at 190 W board power. Short transient spikes can reach about 285 W, so the power supply must have headroom beyond the sum of the parts. Here is what that means with three classes of processor.
| CPU class | Example | Estimated load | Recommended PSU |
|---|---|---|---|
| 65 W-class (e.g. Ryzen 5/7 non-X) | Ryzen 7 9700X | 355 W | 550 W |
| 125–180 W-class (mid-range K / X) | Ryzen 7 9800X3D | 410 W | 550 W |
| 250 W-class (flagship Intel K) | Core i7-13700K | 543 W | 750 W |
How we calculate it
Estimated load = CPU maximum turbo power + 190 W for the card + 100 W for motherboard, memory, storage and fans. We multiply by 1.3 for transient headroom and round up to the next common PSU size. Full details on the methodology page.
Connectors
A single 8-pin (or 6+2-pin) PCIe connector is typical; some low-power models draw everything from the slot. Almost any modern PSU qualifies.
When to step up a tier
Heavy overclocking, custom water cooling, more than four drives or a lot of RGB each add tens of watts. If two or more apply, buy the next size up. Efficiency and fan noise are also best at 50–70% load, which the 1.3× rule already lands you in.
Try your exact CPU in the PSU calculator Best CPU for the Arc B580