More bad news for AMD \ ATI.

 AMD's official graphics card diagnostic and validation software was recently discovered to have a bug that failed to detect defective ATI Radeon HD 2400 and 2600 graphics cards, according to sources at graphics card makers. Although the problem can be easily solved by reapplying the BIOS, because AMD's software did not detect the defect before shipping, the cards will now need to be returned to the makers to be restored. One first-tier maker has recalled over 20,000-30,000 units already, noted the sources.

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