Power supply for the Radeon RX 580

How much power the Radeon RX 580 needs

The Radeon RX 580 is rated at 185 W. With Ryzen 5 5600 the whole PC comes to about 363 W under load, so a 550 W power supply gives about 40 percent headroom and a 450 W unit is the least we would use. Across the four processors in the table the recommended size runs from 550 W to 750 W, which shows how much the processor matters.

For comparison with the neighbouring cards in our list, the Radeon RX 480 (150 W) needs 550 W and the GeForce GTX 1060 6GB (120 W) needs 450 W with the same processor.

Processor by processor

For the Radeon RX 580, with the Ryzen 5 5600 the load is about 363 W and a 550 W supply fits; with the Ryzen 5 7600 the load is about 363 W and a 550 W supply fits; with the Core i5-14600K the load is about 498 W and a 750 W supply fits; with the Ryzen 7 7800X3D the load is about 429 W and a 650 W supply fits. The gap between the lightest and the heaviest build is 200 W of recommended supply, which is about the rating of a mid-range graphics card on its own.