Date: Thu, 19 Apr 2001 21:56:22 -1000 (HST) From: Vincent Poy <vince@oahu.WURLDLINK.NET> To: Charles Burns <burnscharlesn@hotmail.com> Cc: <seanp@loudcloud.com>, <jgowdy@home.com>, <lplist@closedsrc.org>, <kris@obsecurity.org>, <mwlist@lanfear.com>, <freebsd@sysmach.com?>, <questions@FreeBSD.ORG> Subject: Re: the AMD factor in FreeBSD Message-ID: <Pine.BSF.4.31.0104192154390.2730-100000@oahu.WURLDLINK.NET> In-Reply-To: <F145O22ZhCl8aii08N800001cb0@hotmail.com>
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On Fri, 20 Apr 2001, Charles Burns wrote: > > > >These are the only differences between the chips from my understanding > >(if > > > >I am > > > >wrong I am sure someone here will set me straight) > > > > > > Right except the FSB is the same on both. FSB speed differs only between > > > Intel chips. > > > > True except lots have been saying the Intel Celeron II 800 is > >really the Celeron 533 overclocked. > > Well, yes, of course it is.Do you think there is any physical difference > between the two besides labelling? > Intel/AMD make their chips en masse. > > Bob's Athlon 1000 may well have been on the exact same silicon wafer as > Joe's Athlon 1300 and Sam's Athlon 800. They test each chip and then mark > them accordingly. Not really... > If there is suddenly a huge demand for 900MHz Athlons and nobody wants the > 1200's, AMD will sell 1200's as 900s. They are all the same chips made at > the same time from the same plant (other than Durons) and all cost the same > to manufacture. Maybe the ones that don't past certain tests are relabeled as the lower end ones... > My computer--an Athlon classic week 42 (good week, heh) was sold as 500MHz, > is marked as 600MHz, works at 700MHz just fine and with voltage boost will > run at 800 rock-solid. Hehe. I just hope you didn't get charged a 600Mhz prive for a 500Mhz chip.. > There are several factors that determine what your chip runs at by default. > Some are: > *What it was tested to run at > *What the market wants > *What week the chip was manufactured in. AMD and Intel tweak their > manufacturing process weekly and often get better yields later on. That's > why the first Athlon's would be hard pressed to surpass 800 but can now > often surpass 1500. > *What size the transistors are (.18 micron, .25 micron, etc.) > *What plant they were manufactured in > *What metal is being used to connect the transistors (i.e. copper, aluminum) > Chips that are close to the center of the silicon wafer (which is from 6 to > 12 inches in diameter) tend to be better than those closer to the outside. > *What semiconductor material is used. Some exotic chips use Gallium Arsenide > or Germanium rather than silicon. Don't worry about this unless you are > playing with Cray-class puters though. > > The final official clockspeed is usually more a matter of market conditions > than what the chip is really capable of. The exception is that if you get a > top of the line chip it is usually close to it's limit. The latest Athlons > seem to be doing quite well as far as "overclocking" goes though. Yep, if they can do those speeds then it must be working. Cheers, Vince - vince@WURLDLINK.NET - Vice President ________ __ ____ Unix Networking Operations - FreeBSD-Real Unix for Free / / / / | / |[__ ] WurldLink Corporation / / / / | / | __] ] San Francisco - Honolulu - Hong Kong / / / / / |/ / | __] ] HongKong Stars/Gravis UltraSound Mailing Lists Admin /_/_/_/_/|___/|_|[____] Almighty1@IRC - oahu.DAL.NET Hawaii's DALnet IRC Network Server Admin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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