Intel Arc B · Battlemage · data reviewed 2026-11-10
What PSU for the Intel Arc B580?
With a Ryzen 7 9800X3D, two DDR5 sticks, one NVMe drive, and three fans, WattWise estimates 367 W continuous while gaming. The minimum size is 500 W. The efficiency size is 750 W.Intel's published system minimum is 600 W.
These open a store search for that wattage class. Prices stay on the store. Disclaimer.
Three CPU pairings
Same platform each time: two memory modules of the CPU's generation, one NVMe drive, three fans, no pump. Gaming uses the CPU's base power. The ceiling puts the CPU on its package limit and the GPU on rated board power.
| CPU | Gaming load | Minimum | Efficiency size | Both at the limit |
|---|---|---|---|---|
| Ryzen 5 9600X a 65 W six-core gaming CPU | 312 W | 400 W | 650 W | 335 W · 450 W |
| Ryzen 7 9800X3D the current 120 W gaming CPU most builds are compared against | 367 W | 500 W | 750 W | 409 W · 550 W |
| Ryzen 9 9950X a 170 W sixteen-core CPU at its stock 200 W package limit when both are maxed | 417 W | 550 W | 850 W | 447 W · 600 W |
Connectors and spikes
12 GB GDDR6. Total Board Power: 190 W, from the vendor. These figures are the reference design. A partner card can raise the power limit and change the plug.
Intel Arc B580 is rated 190 W. 1× 8-pin. The connector budget covers the rated board power.
This reference design uses 6-pin and 8-pin plugs, not 12V-2x6. Shop the continuous wattage. A PSU without a 12V-2x6 connector follows the lower ATX excursion column (150% for 100 µs on units at or under 450 W, and on larger units that omit the connector). That is still not a reason to double the label.
The vendor does not publish a separate in-game average. The gaming estimate uses rated board power.
Intel's specification lists a 600W minimum power supply and 1× 8-pin on the reference card.
Questions this card actually raises
What PSU do I need for a Intel Arc B580 with a Ryzen 7 9800X3D?
With 2× DDR5, one NVMe drive, and three fans, WattWise estimates 367 W continuous while gaming. The minimum size for that estimate is 500 W. The efficiency size, near 50% load, is 750 W. If the CPU and GPU both hit their power limits together, the load is 409 W and the minimum size is 550 W.
Which power connectors does the Intel Arc B580 reference design use?
1× 8-pin. Intel Arc B580 is rated 190 W. 1× 8-pin. The connector budget covers the rated board power.
Why is the vendor PSU number different from WattWise for the Intel Arc B580?
Intel publishes a system minimum of 600 W. Intel's specification lists a 600W minimum power supply and 1× 8-pin on the reference card.
Do transient spikes mean I should double the PSU for a Intel Arc B580?
This reference design uses 6-pin and 8-pin plugs, not 12V-2x6. Shop the continuous wattage. A PSU without a 12V-2x6 connector follows the lower ATX excursion column (150% for 100 µs on units at or under 450 W, and on larger units that omit the connector). That is still not a reason to double the label.