AMD responds to Radeon HD 4830 limited shader issue
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