CFexpress 4.0 logical and physical specifications — announcement

Scope and location

CFexpress 4.0 PCIe Gen4 / NVMe 1.4c context and retained form factors; public announcement only.

Published 2023-08-28; Performance, Form Factor and Scalability paragraphs.

Open the original source

Inspected

2026-10-08

Access

public page

Recorded AI-assisted source inspection; not independent human approval or hardware testing.

Not a licensed normative specification. No universal exact-device, adapter, throughput or recording-mode qualification.

Source inspection is separate from independent technical approval, rights clearance and hardware testing.