Chuwi CoreBook Scam: Firmware Spoofing Hides Old Ryzen 5500U Inside New Models
Chuwi Exposed for Fake CPU Scandal: Ryzen 5 7430U Swapped for Older 5500U
A major hardware scandal has erupted involving the popular budget Chinese laptop brand Chuwi. An investigative report by Notebookcheck and subsequent reporting by Tom’s Hardware in March 2026 has uncovered that Chuwi is shipping laptops with “fake” CPUs. Specifically, devices marketed with the modern AMD Ryzen 5 7430U (Zen 3) are actually equipped with the older, less powerful Ryzen 5 5500U (Zen 2).
The “Bait and Switch” Investigation
The controversy began with the CoreBook X, where users noticed performance discrepancies. Upon a physical teardown, the chip’s OPN code (100-000000375) confirmed it was a Ryzen 5 5500U. Chuwi initially dismissed the claims as a “production batch error,” but the situation escalated when Notebookcheck tested a second model, the CoreBook Plus, and found the exact same deception.
What makes this “fraud” particularly sophisticated is the level of tampering:
- Firmware Spoofing: Chuwi reportedly modified the BIOS/firmware so that Windows, the BIOS splash screen, and even diagnostic tools like CPU-Z and HWiNFO report the processor as a “Ryzen 5 7430U.”
- Physical Deception: Both the retail packaging and stickers on the laptop chassis explicitly label the device with the newer Ryzen model.
- Legal Threats: Instead of addressing the issue, Chuwi reportedly threatened Notebookcheck with legal action, demanding the articles be taken down for “reputational damage.”
Performance Impact: What Users are Losing
While the Ryzen 5 7430U and 5500U may appear similar on paper, the older 5500U is significantly weaker. The 7430U uses the Zen 3 architecture, while the 5500U is based on Zen 2 (Lucienne).
| Specification | Ryzen 5 7430U (Advertised) | Ryzen 5 5500U (Actual) |
| Architecture | Zen 3 (Barcelo) | Zen 2 (Lucienne) |
| L3 Cache | 16 MB | 8 MB (Half) |
| Max Boost Clock | 4.3 GHz | 4.0 GHz |
| Performance Gap | – | Approx. 7% to 20% Slower |
For a laptop costing approximately $535 (18,200 THB), users are paying for modern performance but receiving hardware that is several years old. The halved L3 cache alone causes a noticeable drop in productivity and gaming performance.
Conclusion: A Crisis of Trust
Because this issue has been discovered across different motherboard designs and models, experts believe this is a deliberate move within the supply chain rather than an accident. Whether Chuwi knowingly participated or was misled by an ODM (Original Design Manufacturer), the brand’s reputation has been severely compromised. Consumers are advised to exercise extreme caution when purchasing budget laptops from the brand until a formal recall or transparent explanation is provided.
Origin: Tomshardware
