Some ATI Radeon HD 4830s are Gimped
If you bought a new HIS Radeon HD 4830, ATi says that you might need to flash the BIOS
. According to a statement from the company, about 400 card shipped with a bad BIOS that prevented 80 of the video cards 640 stream processors from working.
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. 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."