Why Nvidia's chips are defective

Part One A long and complex story
By Charlie Demerjian: Monday, 01 September 2008

NVIDIA HAS RECENTLY been saying a lot about how it's chips are not bad, and giving people reasons about why the problem is contained. Unfortunately, these disingenuous half-truths don't stand up to an explanation of why this problem is happening. The problem is extremely complex and defies a simple explanation. It involves multiple poor choices, multiple engineering failures, and likely a few bad accounting choices. This piece could also have been entitled: "More than you ever wanted to know about bumping, and then some: How not to do things". But we will simplify the science and technical details as much as possible to make it accessible, so some things may be oversimplified. The defective parts appear to make up the entire line-up of Nvidia parts on 65nm and 55nm processes, no exceptions. The question is not whether or not these parts are defective, it is simply the failure rates of each line, with field reports on specific parts hitting up to 40 per cent early life failures. This is obviously not acceptable.

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Part Two -- Why Nvidia's duff chips are due to shoddy engineering can be found here-->Link