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ASRock has finally acknowledged that the mysterious AMD Ryzen "processor deaths" plaguing its mid- and high-end motherboards weren't caused by defective AMD chips or stray debris but rather overly aggressive Precision Boost Overdrive settings in its BIOS. After more than 100 reports of Ryzen 7 9800X3D and Ryzen 9 9950X CPUs going dark on boards like the X670E Taichi and B650E Steel Legend, the company rolled out BIOS version 3.25 to dial back the Thermal Design Current and Electrical Design Current limits and apologized for initially blaming memory quirks and socket contaminants. ASRock will repair or replace affected motherboards free of charge (including shipping), though users whose CPUs have already failed must seek warranties through their retailer or AMD.

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"No, we're not saying it's an AMD issue. We found that it should be related to our BIOS setting — that's the PBO settings, Precision Boost Overdrive. More technically, we adjusted two main settings in PBO. One is TDC (Thermal Design Current) and the other is EDC (Electrical Design Current). We found that our original values for these two settings might have been too high. So now, with BIOS version 3.25, we lowered the PBO values. We believe this can solve the problem."—Chris Lee, ASRock VP of Motherboard Business

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