New Delhi, Oct. 29 -- CUPERTINO - Apple now offers its long-promised 512GB unified-memory configuration for the M5 Ultra Mac Studio, taking the US cash price to $22,299 with a 1TB SSD. The 512GB figure describes working memory shared across the chip, not storage capacity.

This configuration requires the higher-end M5 Ultra with a 36-core CPU and 80-core GPU. The family's $5,499 starting price belongs to the 30-core CPU, 64-core GPU and 96GB memory model, not a 512GB machine.

The memory step adds $15,500 over 96GB on the same higher-end processor. Moving from 256GB to 512GB adds $11,500. Neither figure is the price of a complete desktop, and neither includes a storage upgrade.

Apple's US configurator lists the 512GB machine with 1TB sto...