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-Now, now, finally some detailed and reasonable explanations for all these messes. Look likes Charlie really did his homework (research) to bring these up.
-First,
(Part 1) Why Nvidia's chips are defective:
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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.
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The end result of the failures is that bumps crack between the bump and the substrate on a chip, not on the bump to die side. When this happens to a signal bump, game over for the GPU or MCP. What is a bump, die and substrate? Why is it happening? That is a long and technical story.
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-So, you have to read the entire article.

-Next,
(Part 2) Why Nvidia's duff chips are due to shoddy engineering:
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Let's go down the checklist for Nvidia. High thermal load? Check. Unforgiving high lead bumps. Check. Eutectic pads? Check. Low Tg underfill? Check. Hot spots that exceed the underfill Tg? Check. If you are thinking this looks bad, you are right, expensive too.
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-Again, you should read the entire article to fully understand the whole point. According to them, Part 3 will be coming shortly. As as disclaimer, all responsibility of the authenticity of this facts are belongs to The Inquirer.
Regards.
This post has been edited by Musafir_86: Sep 3 2008, 11:49 AM