Overview
- Two news reports say ChangXin Memory Technologies has begun sending HBM3E samples to Chinese AI chipmakers and plans a limited production push even though most chips fail quality checks.
- Sources reported usable yields of roughly 20% to 30%, meaning only a small share of chips from a production run meet specifications and can be sold.
- Early testing reportedly shows CXMT’s HBM3E performs closer to the prior-generation HBM3 than to leading HBM3E products from SK Hynix and Samsung.
- Low yields will make CXMT’s HBM3E costly and constrain volume, but tight import controls on advanced HBM have left domestic AI chipmakers willing to test higher-cost local supply.
- High-bandwidth memory stacks DRAM chips close to AI processors to move data very fast, and China’s drive to build a local HBM supply follows U.S. export curbs and long-running gaps between CXMT and global leaders.