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AMD Phenom II under-voltaging

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The most power-hungry CPU AMD has is the 955 Black Edition, which will shortly be only the second best, when in some weeks the 965 Black Edition will be launched. Our test-sample has a huge VCore of 1.350V, so we were quite surprised to be able to set it to 1.175V, quite an achievement:

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The recently 905e has not much headroom, 1.05V is the lowest we can get.
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The smaller 810 CPU did also quite well, with just 1.140V.
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To be sure that the CPU runs correctly, we used Prime95. Normally you should run this programme a day or two, to be sure, but unfortunately we didn't have that much time. So we were happy with one run of small FFTs and one with In-Place FFTs.

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Last modified on 17 July 2009
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