The Digester

Chuwi accused of shipping older Ryzen CPUs while advertising newer chips

Mar 5th 2026

A Notebookcheck teardown and user reports allege Chuwi shipped CoreBook X laptops with older Ryzen 5 5500U silicon while marketing them as Ryzen 5 7430U, with firmware masking the true processor identity.

  • Notebookcheck teardown found the CoreBook X contains a chip labeled OPN 100-000000375, which corresponds to the Ryzen 5 5500U.
  • System firmware and diagnostic tools reported the CPU as a Ryzen 5 7430U, suggesting firmware-level spoofing of the processor identity.
  • The Ryzen 5 7430U uses Zen 3 and 16 MB L3 cache while the 5500U uses Zen 2 and 8 MB L3 cache, a hardware difference that affects performance.
  • Typical performance gap between the two chips is about 7 percent, and Notebookcheck measured about a 10 percent gap in the CoreBook X because of single-channel memory.
  • Chuwi previously marketed the model as CoreBook X 7430U but later removed the explicit chip name from listings and cited production batches or leftover stock in responses to the controversy.

Sources

tomshardware.com