AMD Radeon RX 590 power connector: what does it need?
The AMD Radeon RX 590 needs 1× PCIe 8-pin from the power supply. At about 225 W board power, here is what to know before you plug it in.
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.
Official reference specification not found for the AMD Radeon RX 590. The manufacturer publishes no reference board-power or connector layout for this card (it was a board-partner-only release), so the figures below are best-effort and deliberately left unverified. Check your exact card's specifications.
Power connector
1× PCIe 8-pin
Reference power input.
GPU board power
225 W
Vendor TGP/TBP — a conservative ceiling, not typical gaming draw.
PSU minimum (typical build)
550 W
Assumes a 125 W-class CPU + standard accessories.
PSU comfortable (typical build)
650 W
Standard headroom for spikes and future room.
Board-partner note
Vendor does not publish a reference power connector for this card; value shown is the common partner-card configuration.
ATX 3.x advice
Any competent modern power supply with the right cable handles this card. ATX 3.x is optional at this power class.
Safety notes
- Never mix modular cables between different PSU brands or models. The PSU-side pinout is not standardized — a mismatched cable can destroy hardware.
- Do not exceed a cable's rated load with splitters or adapters, and replace any cable with damaged or discolored connectors.
- Before buying, confirm the connector layout and PSU guidance on the official pages of both your exact card model and your PSU — board partners change designs between variants.
Sizing a supply for a full build? See the AMD Radeon RX 590 PSU recommendation → or open the full PSU Calculator →
How to check this figure
AMD's specification database does list this card — name, launch date 2018-11-15, 36 compute units, 2304 stream processors — but leaves Typical Board Power, Minimum PSU Recommendation and Additional Power Connector empty. The RX 580 in the same database carries "185 W" and "500", so the blanks are AMD's, not a reading error. They are systematic too: every RX 500 card launched 2017-04-18 has values, and every 2018 refresh (540X, 550X, 560X, 570X, 580X and this card) has none.
Source: No AMD-published board power or PSU figure for this card. Last updated: 2026-07-22.
Frequently asked questions
What power connector does the AMD Radeon RX 590 use?
The AMD Radeon RX 590 uses 1× PCIe 8-pin. Always confirm the exact layout on your specific board-partner model.
Do I need an ATX 3.1 power supply for the AMD Radeon RX 590?
Any competent modern PSU with the correct cable handles the AMD Radeon RX 590. ATX 3.x is optional at this power class.
What size PSU pairs with the AMD Radeon RX 590?
For a typical companion system we estimate a 550 W minimum and 650 W for comfort. Use the PSU Calculator for your exact CPU and parts.