Apple's M3 Ultra processor in the Mac Studio is highly power-efficient, outperforming most desktop CPUs.The M3 Ultra chip uses an ARM-based architecture, which contributes to its power efficiency compared to x86 processors.In benchmarks, the M3 Ultra shows slightly lower power efficiency than the M4 Max variant but surpasses other desktop processors.Considering price and power efficiency, the M4 Max model is recommended for most users over the M3 Ultra.