What PSU do you need for a Intel Arc B580?
The Intel Arc B580 has a vendor-published board power (TGP/TBP) of about 190 W. Sizing a power supply from that figure and a typical companion system (a 125 W-class CPU plus standard ATX accessories, ~242 W), here is what we recommend.
Recommendations are planning estimates, not electrical or purchasing advice. The hardware figures behind them are vendor-published; your exact board-partner model and build can still differ.
Recommended (comfortable)
550 W
Standard headroom for transient spikes and a little future room.
Minimum
550 W
Smallest quality PSU tier we would pair with this card in a typical build.
GPU board power
190 W
Vendor TGP/TBP — a conservative ceiling, not typical gaming draw.
Vendor-recommended PSU
600 W
The wattage the GPU vendor lists — deliberately conservative.
Power connector
1× PCIe 8-pin. Use native PSU cables and confirm the layout on your exact board-partner model. See connector & ATX 3.x details →
Why 550 W for this card
The Intel Arc B580's draw is not flat. Brief spikes above the rated board power are normal, and they are short enough that a wall meter never shows them — but a power supply sitting close to its limit can trip on one. That is what the headroom in these figures is for: 190 W is the sustained ceiling, not the worst instant. This card feeds from standard PCIe connectors, so any quality supply with the right cable count works; there is no 16-pin cable to source. At 190 W a quality unit of the recommended wattage handles transients without drama; an ATX 3.x supply adds margin but is not essential. We do not publish a spike figure for the Intel Arc B580 because the manufacturer does not publish one.
On the recommended 650 W supply, a Ryzen 7 9800X3D paired with the Intel Arc B580 draws roughly 469 W under load — about 72% of the unit's rating. The 80 PLUS programme certifies efficiency at 20%, 50% and 100% load, and units are typically at their best around the middle of that range, so this sits in a sensible place: enough margin for transients without paying for capacity that never gets used.
The manufacturer recommends 600 W, which is 50 W above our comfortable figure of 550 W. Vendors size their guidance conservatively to cover weak supplies and heavy CPUs, so treat 600 W as the safe retail answer and 550 W as what the math supports for a typical build with a quality unit.
Pairing this card with different CPUs
The CPU does change the answer here. With a Ryzen 5 7600 this build sits on a 550 W supply, but moving to a Ryzen 7 9800X3D (162 W peak) pushes the estimate to 650 W. If you are pairing this GPU with a high-power CPU, budget for the larger unit.
| CPU | CPU peak | System load | Recommended PSU |
|---|---|---|---|
| Ryzen 5 7600 | 88 W | 395 W | 550 W |
| Ryzen 7 9800X3D | 162 W | 469 W | 650 W |
| Core i9-14900K | 253 W | 560 W | 750 W |
Other popular choices map onto this table rather than changing it: the Ryzen 7 7800X3D has the same 162 W peak as the Ryzen 7 9800X3D, so that row applies to it unchanged; a Core i5-14600K (181 W peak) lands on the same 650 W tier as the Ryzen 7 9800X3D; a Ryzen 9 9950X (230 W peak) lands on the same 750 W tier as the Core i9-14900K.
Assumes an ATX board, 2 RAM sticks, 1 SSD, 3 fans and a USB allowance, at the standard headroom profile. Change any of it in the calculator.
Cabling this card
This card needs a single 8-pin PCIe connector. Use the cable that came with your supply, and avoid adapters where you can — at 190 W there is no need for a splitter.
Intel Limited Edition uses a single 8-pin; some board-partner OC cards (e.g. ASRock Challenger OC) raise power and recommend 650 W PSUs. Factory-overclocked cards from board partners can also carry a higher power limit than the reference design, so if your card advertises an OC BIOS, treat the figures here as the floor rather than the ceiling.
Want a number for your exact CPU and parts? Open the full PSU Calculator with this GPU pre-selected →
The standards behind these numbers
- How much PSU headroom do you actually need?
Why the recommendation above sits above the 190 W board power rather than on it.
Worth knowing
Intel official Total Board Power 190 W.
How to check this figure
Intel publishes this on the card's ARK specification page, in the "Intel Reference Card Attributes" block, under the label "Minimum Power Supply Unit" — not "Recommended Power Supply". Board power on the same page is labelled "TBP".
Board-power source: Intel official specification; multi-agent web verification 2026-07-15. Last updated: 2026-07-22.
Frequently asked questions
What size PSU do I need for a Intel Arc B580?
For a typical build that pairs the Intel Arc B580 (about 190 W board power) with a 125 W-class CPU and standard accessories, plan for at least a 550 W power supply. A 550 W unit gives comfortable headroom for transient spikes and future upgrades. These are estimates — verify against your exact parts.
How much power does the Intel Arc B580 draw?
Its vendor-published board power (TGP/TBP) is about 190 W. That is a conservative ceiling used for PSU sizing, not the typical draw you would see while gaming.
Is a 600 W PSU enough for a Intel Arc B580?
Intel Arc B580's manufacturer lists a 600 W PSU recommendation. That figure is deliberately conservative to cover weaker units and power-hungry CPUs, so a quality 600 W supply is a safe choice. Our own estimate for a typical build is a 550 W minimum and 550 W for comfort.
Does the CPU change what PSU the Intel Arc B580 needs?
Yes. With a Ryzen 5 7600 the estimate is 550 W, while a Core i9-14900K (253 W peak) takes it to 750 W.
Why does this differ from Intel Arc B580's official PSU recommendation?
The manufacturer lists 600 W and our comfortable figure is 550 W. Vendor guidance assumes a mainstream companion system; ours adds standard headroom to a typical build. Both are shown on this page so you can judge.