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Technology Stocks : Advanced Micro Devices - Moderated (AMD)

AMD 208.44

+8.3%

Feb 6 9:30 AM EST

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To: Mani1 who started this subject	5/12/2001 9:10:58 AM
From: andreas_wonisch	Read Replies (1) of 275872

Proof for P4 clock-throttling discovered? hardware-unlimited.com Some excerpts: After running several tests consecutively, usually three sets of all the resolutions within a certain detail setting, the performance degradation we have seen so many times would start and performance would drop off to a nearly 50% level and would not return to normal till Quake III: Arena was exited. Sometimes the machine even had to be rebooted. We tested on several other systems including Athlons and even other P4 systems. The problem only happened using Pentium 4’s on the Intel D850GB motherboard, which makes us believe even more strongly that the problem is possibly throttling caused by Intel’s BIOS. [...] From reading the review, these results are far from normal and way out of context from what we have ever seen before. As a sanity check, we have included a partial review of the AMD Athlon 1.33Ghz, which we plan to benchmark more thoroughly and post a follow up review soon. On the other hand, we uncovered some substantial evidence regarding a possible throttling case with the Pentium 4. Moreover, we did not reach this conclusion in just a few hours of testing. We have been working on this nearly day and night for the past two weeks. When the original wave of questions and comments regarding our findings in our Pentium 4 1.7Ghz review came in we were much more intrigued by our previous unexplainable findings and looked for a method to proceed and further test our results. This is where John Evans, Bert McComas, and Van Smith came along and helped us. John Evans supplied us with the throttling program and Bert and Van were nice enough to reconfirm our findings and offer a few suggestions in the way of testing. We used production CPUs (not engineering samples) certified power supplies and extremely high quality copper base heat sinks supplied by Intel for use with the 1.7GHz processor. As you might have noticed, I have been much more dormant over the past two weeks on the site as far as news, articles, and overall contribution has been concerned due to this very time consuming issue we are dealing with. Andreas

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