April 28, 2006 7:58 AM PDT

Some AMD Opterons suffer heat issue

Advanced Micro Devices is trying to track down and replace as many as 3,000 Opteron processors that could produce "inconsistent results" under an unusual, high-temperature circumstance.

The potential problem affects a number of single-core Opteron 152, 154, 252, 254, 852 and 854 processors manufactured in late 2005 or early 2006, AMD said Friday. The company hasn't seen the problem in production use, but has seen it in a test that combines high processor temperature, high outside temperature, and a large number of floating-point mathematical computations.

AMD said it has added a new screening process at its manufacturing plants to put affected chips into a lower speed category. For example, a 2.8GHz model won't exhibit the problem when running at 2.6GHz, AMD said.

AMD is working with computer makers to track down the chips and is offering free replacements.

The Sunnyvale, Calif.-based chipmaker has made PC processors for years, but only in 2003 entered the server market with the Opteron chip. Server chips typically offer higher performance, withstand higher heat, and have circuitry that lets several communicate in the same computer.

Since the Opteron's debut, AMD has steadily gained share against Intel's Xeon, which previously had the vast x86 server market to itself, but Intel is working to become more competitive. Opteron's performance advantages has won it a place in servers from Sun Microsystems, Hewlett-Packard and IBM.

After AMD confirmed the problem, it determined the chips had fallen through a "test escape"--a situation in which a flawed chip passes all tests. In other words, the company says the problem lies in testing, not in manufacturing or design.

See more CNET content tagged:
AMD Opteron, AMD, manufacturing, chip company, server

2 comments

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Well, not 2003 but since the MP days
AMD acctually has been in the server market since they made the Athlon MP. The market share may not have been nearly as much as they have now, but they were still in the market.
Posted by CaptDave86 (30 comments )
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Blown out of proportion
This is a small issue in a small number of chips (3000 or less) that is unlikely to every crop up. But inspite of that AMD is very publically admitting to what is going on and getting replacement chips out to customers. Your article makes it sound like AMD had a major problem. It should read "A very few Opterons have issues under rare conditions."
Posted by IT_Thinker (8 comments )
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