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在沉默了几天之后，AMD终于针对HD4830的流处理器缺少事件发表说明。AMD表示，这只有少量的样品显卡使用了早期的BIOS，导致显卡性能下降。同时AMD也指出，在市面上仅仅存在少量HD 4830使用了这种早期BIOS。AMD指出这并不是核心有问题，用户只需要更新厂家提供的最新BIOS就可以了。
在进一步的说明中，AMD指出，HIS的部分HD 4830使用了早期BIOS，所有的HIS HD 4830用户需要使用最新版本的GPU-Z来查看显卡，如果流处理器不到640个，用户就需要更新BIOS以使用显卡的完整性能。以下是AMD的公告原文：
"AMD has identified that, in addition to reference samples of the ATI Radeon™ HD 4830 boards sent to media with a pre-production BIOS potentially impacting the card’s performance, a very limited number of ATI Radeon™ HD 4830 boards were released to market with the same pre-production BIOS. This is in no way hardware related, and an updated BIOS fully resolves the performance limitation.Through consultations with AMD board partners, it has been determined with a high degree of certainty that fewer than 400 ATI Radeon™ HD 4830 boards from one AMD board partner, HIS, have reached the market with the pre-production BIOS incorrectly provided by AMD. As only a small number of HIS-branded ATI Radeon™ HD 4830 cards are impacted, we ask any customers that purchased an HIS-branded ATI Radeon™ HD 4830 to test the board using the GPU-Z utility (available at http://www.techpowerup.com/gpuz). If the GPU-Z utility reports fewer than 640 shaders, please visit the HIS website for information on how to update the card BIOS via a downloadable install utility."