Author: Robert Hyatt
Date: 21:30:07 02/20/03
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On February 20, 2003 at 18:55:41, Jeremiah Penery wrote: >On February 20, 2003 at 11:42:49, Robert Hyatt wrote: > >>On February 20, 2003 at 09:53:28, Jeremiah Penery wrote: >> >>>Intel has demoed chips that run far above the currently shipping 3.06GHz. Why >>>do you suppose they haven't released them? _That_ is "business". If Intel >>>releases a 5GHz chip tomorrow, they'd sure knock everyone else out of the >>>performance race, but they would lose a TON of money relative to the current >>>business model. >> >> >>That is _not_ the same idea. The idea that a vendor purposefully underclocks a >>chip >>is ridiculous. The idea that they don't release the next generation at a faster >>clock rate >>until the current supply of slower chips is exhausted is not contradictory at >>all. Two >>totally different business practices, one of which makes economic sense, the >>other makes >>zero sense. > >I've done some reading today, and this is what I've found out. Some of it might >not be 100% correct, but I believe it to be close. > >In the past, when a microprocessor was designed, they found the theoretical >circuit limit and removed something like 20%. That was about the limit of what >would be sold, to be completely certain about stability. Nowadays, with current >50m+ transistor CPUs, the padding has been increased somewhat. Though, when a >core is reaching to the end of its useful lifetime, it surely eats into that >'padding'. > >Overclocking a 2GHz Willamette P4 is probably not a bright idea. The core is at >the end of its lifetime, and there is very little headroom for it. But there's >no reason that overclocking a 2GHz Northwood shouldn't be safe, since Intel has >already released 3GHz versions with an identical core. I'm not suggesting you >should be able to get 3GHz out of the 2GHz part, but that doesn't mean it can't >be overclocked at all. Yes, but nobody cares about overclocking 2ghz parts when 3ghz parts are available. The issue is "is it safe to overclock the latest 3ghz parts" and there I say "no". If you notice, the overclocking here is mainly about people taking the latest parts and running them beyond their specs...
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