What PSU for a AMD Radeon RX 9070 XT and Core i5-14600K?
Pairing a AMD Radeon RX 9070 XT (304 W board power) with a Core i5-14600K (181 W peak) gives a system load of about 602 W. Both figures are verified against the manufacturers’ own specifications — the sources are linked below.
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 PSU
850 W
Leaves the supply at about 71% load under gaming.
Minimum
750 W
Smallest quality tier we would pair with this build.
System load
602 W
304 W GPU + 181 W CPU + 117 W rest of build.
GPU power connector
2× PCIe 8-pin
Plus the board’s EPS 12V cable for the CPU.
Where the power goes
Load is split fairly evenly — the AMD Radeon RX 9070 XT takes 50% of the 602 W total and the Core i5-14600K 30%. Both parts matter to the sizing, which is why the pairing is worth looking at rather than either part alone. The remaining 117 W covers the board, memory, one SSD, three fans and a USB allowance.
GPU 50% · CPU 30% · rest of build 20%
Why 850 W
This is a close call. With standard headroom the requirement lands almost exactly on a 750 W unit, clearing it by well under one percent, so a high-quality 750 W supply is not absurd — it would simply run closer to its limit, at roughly 80% load under gaming. We still recommend 850 W: the margin buys quieter fan behaviour and room for the brief peaks a card of this class produces.
Graphics-card draw is not flat — brief peaks above the rated board power are normal, and a supply running close to its limit can trip on one. We do not publish a peak figure for the AMD Radeon RX 9070 XT because the manufacturer does not publish one. At 304 W a quality unit of the recommended wattage copes without drama; an ATX 3.x supply is a reasonable buy but not a requirement for this build.
The card's manufacturer recommends 750 W for the AMD Radeon RX 9070 XT on its own. Paired with the Core i5-14600K, which can pull 181 W by itself, we arrive at 850 W — 100 W higher. Vendor guidance assumes a mainstream companion CPU; this pairing is not that. The vendor figure is not wrong, it is answering a different question.
Cabling this build
The AMD Radeon RX 9070 XT takes 2× PCIe 8-pin. Run a separate cable from the supply to each connector rather than using one daisy-chained lead — at 304 W a single cable is carrying more than it should. On top of that the board needs its EPS 12V CPU cable — one 8-pin is enough for the Core i5-14600K at 181 W, though many boards expose a second socket you can leave empty.
Different case, more drives, or an AIO? Open the PSU Calculator with both parts pre-selected →
Figures above assume an ATX board, 2 RAM sticks, 1 SSD, 3 fans and a USB allowance, at the standard headroom profile.
Frequently asked questions
What PSU do you need for a AMD Radeon RX 9070 XT and Core i5-14600K?
We recommend a quality 850 W power supply. The pairing draws about 602 W under load — 304 W for the card, 181 W for the CPU and 117 W for the rest of a typical build — and 750 W is the smallest tier we would pair with it.
How much power does a AMD Radeon RX 9070 XT and Core i5-14600K build use?
About 602 W under a combined gaming load, which is roughly 71% of the 850 W supply we recommend. That is a conservative figure built from vendor-published ceilings, so day-to-day draw is usually lower.
Is 750 W enough for a AMD Radeon RX 9070 XT and Core i5-14600K?
750 W is the card maker's recommendation for the AMD Radeon RX 9070 XT alone. With the Core i5-14600K in the same build we would step up to 850 W, because that CPU can add 181 W on its own.