AMD Radeon RX 6400 power connector: what does it need?
The AMD Radeon RX 6400 draws all of its power — about 53 W — through the PCIe x16 slot, so it needs no external power connector from the power supply.
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.
Power connector
None
Slot-powered — no PSU cable required.
GPU board power
53 W
Vendor TGP/TBP — a conservative ceiling, not typical gaming draw.
PSU minimum (typical build)
450 W
Assumes a 125 W-class CPU + standard accessories.
PSU comfortable (typical build)
450 W
Standard headroom for spikes and future room.
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 6400 PSU recommendation → or open the full PSU Calculator →
Source: AMD official specification; multi-agent web verification 2026-07-15. Last updated: 2026-07-15.
Frequently asked questions
Does the AMD Radeon RX 6400 need a power connector?
No. The AMD Radeon RX 6400 draws all of its power (about 53 W) through the PCIe x16 slot, so it needs no separate PCIe power cable from the PSU.
What PSU does the AMD Radeon RX 6400 need?
Because it is slot-powered, almost any working power supply is sufficient. For a typical full system we still estimate a 450 W minimum for safe headroom.