Core Ultra 7 265K is 20 cores and 20 threads on LGA 1851. Gaming plans it at 125 W (Processor Base Power). The power-limit profile uses 250 W (Maximum Turbo Power, published). With a Radeon RX 9070 XT, the gaming total is 486 W and the minimum size is 650 W.
Maximum Turbo Power as published on the Intel ARK specification for this SKU. It is an all-core turbo limit, not a typical gaming draw.
Memory in this table is DDR5.
The GeForce RTX 5060 row is the small-card case: the CPU and the platform are a large share of the total. The GeForce RTX 5090 row is the flagship case: the graphics card dominates, and the CPU's base-versus-limit gap matters less until you render on every core.
Questions for this CPU
What PSU does a Core Ultra 7 265K need with a Radeon RX 9070 XT?
Gaming plan for the Core Ultra 7 265K: 125 W at its processor base power, 304 W for the Radeon RX 9070 XT at rated board power, and 57 W of platform allowance. The total is 486 W. Minimum size 650 W. Efficiency size 1,000 W.
How much does the Core Ultra 7 265K add when the GPU is small?
With a GeForce RTX 5060, the gaming total is 327 W and the minimum is 450 W. The same CPU with a GeForce RTX 5090 is 757 W, minimum 1,000 W. The CPU did not change. The graphics card did.
Should I size a Core Ultra 7 265K build for the package limit?
The power-limit profile with a Radeon RX 9070 XT is 611 W, minimum 850 W. That is both parts on their limits at once. Maximum Turbo Power 250 W is printed by the vendor. Use it for a combined render. A GPU-bound game is the lower row.