M5 Ultra leak: 512GB unified RAM
A new leak claims Apple’s M5 Ultra will offer up to 512GB of unified memory—a jump framed as enabling full‑scale on‑device AI training and beefier inference workloads without cloud hops. If true, that changes where privacy‑sensitive and latency‑critical ML can run. (youtube.com)
macOS 26.3 Release Candidate contains new SoC identifiers T6051 and T6052 with platform codes H17C and H17D that analysts and outlets have mapped to M5 Max and M5 Ultra. (macreview.com) Multiple independent leak analyses have been published on YouTube and tech sites since late February, with channels such as Aqib Tech Review and SpecXcel presenting breakdowns based on the macOS/iOS beta fingerprints and supply‑chain tips. (youtube.com) Apple’s last “Ultra” silicon, the M2 Ultra, officially supports up to 192 GB of unified memory and delivered 800 GB/s of memory bandwidth when announced in June 2023. (apple.com) TF International analyst Ming‑Chi Kuo has publicly predicted that the M5 Pro/Max/Ultra family will use TSMC’s server‑grade SoIC‑mH 2.5D packaging and separate CPU/GPU tiles, a change repeatedly reported across trade coverage. (notebookcheck.net) Industry reporting warns Apple’s move to advanced 3D/2.5D packaging will create heavy demand on TSMC’s advanced packaging capacity and could pit Apple against NVIDIA for scarce SoIC/3D packaging slots. (wccftech.com) Multiple outlets project a Mac Studio refresh carrying the new M5 Max and M5 Ultra in the spring–early summer 2026 window around WWDC, following the beta discoveries first flagged in February 2026. (macworld.com) Early pricing and spec rumor threads cite a professional desktop starting price in the roughly $3,999–$4,000 range for flagship M5 Ultra configurations in leaked price estimates and reporting. (techtimes.com)
