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Core Ultra 5 245K Power Draw: PSU Requirements & Real-World Wattage

Core Ultra 5 245K Power Draw: PSU Requirements. Real-world benchmark data, FPS numbers & performance analysis. What SA gamers can actually expect.

Performance Pulse · 22 May 2026 · 3 min read · ChipChaser · ·

Core Ultra 5 245K Power Draw: PSU Requirements &

Quick Answer

The Intel Core Ultra 5 245K draws roughly 125W base and peaks around 159W under all-core loads, well below the older 14600K. A solid 750W 80+ Gold PSU handles the 245K paired with mid-range GPUs, while RTX 4080-tier or higher builds want 850W to 1000W for headroom and transient stability.

Real-World Wattage on the 245K

Arrow Lake's efficiency story is real: the 245K uses noticeably less power than the previous gen at the same workload. In gaming you'll typically see 70 to 110W at the chip, and in heavy productivity (Cinebench, Blender, code compiles) the chip stretches up to its 159W maximum turbo power limit. Idle and light browsing sit comfortably under 30W, which keeps your UPS runtime longer during load shedding. The drop from 14th-gen 14600K's 181W ceiling to 159W means cooler temps and quieter fans on the same cooler.

PSU Sizing for SA Builds

For a 245K + RTX 5070 or RX 9070 build, a quality 750W 80+ Gold unit (Corsair RM750e, MSI MAG A750GL, Cooler Master MWE Gold V2) is the sweet spot. Step up to 850W for RTX 5080 territory and 1000W for RTX 5090. Cheap no-name 750W units are a hard pass: rail stability and transient response matter more than wattage on paper, especially with the spikier transient behaviour of new GPUs. Evetech stocks reputable units with full SA warranty, ZAR pricing and door-to-door courier delivery countrywide.

Cooling and Load Shedding Notes

A 240mm AIO or solid dual-tower air cooler keeps the 245K under 80C in heavy loads, even with Joburg ambients touching 28C in summer. The chip's lower power draw also means a 1000VA line-interactive UPS can hold a typical 245K rig long enough to save work and shut down cleanly during stage 4 to 6 load shedding, a real win for SA users. Pair the UPS with a UPS-aware shutdown script and you'll never lose progress to Eskom again.