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Article #621093Re: BYTE Magazine Pentomino Article
From: Quadibloc
Date: Wed, 07 Mar 2018 01:45
Date: Wed, 07 Mar 2018 01:45
35 lines
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3658 bytes
On Tuesday, March 6, 2018 at 4:24:58 PM UTC-7, Mike Spencer wrote: > Could you put into moderately simple words how it is/was that the > Pentium 4 was a "detour"? > Aside from my new(ish) laptop with a multi-core CPU, I have three P4 > desktops (1 IBM, 2 DELL) that do everything I need. The P II and P > III that I had didn't quite make it but the P4s are fine. The Pentium 4 had a reduced number of gate delays per cycle. This meant that it could achieve a higher frequency as measured in MHz, but instructions took more cycles. That didn't make the higher frequency a mere marketing gimmick, as some comments at the time claimed. Since the Pentium 4, like its predecessors, was pipelined, it started a new instruction on every clock cycle, so it did do more work, in proportion to its faster frequency. However, the higher frequency meant that more of the transistors on the chip were doing work - and therefore switching - at any one time. So the chip used significantly more power than chips based on the older design. That was all right for the Pentium 4 _itself_ - it didn't have heat or reliability problems. But the Pentium 4 had the bad luck to come along just when Dennart scaling died out. So when Intel shrank the feature size on its chips, the transistors didn't get faster and use less power to the same extent as they had before with every process shrink. So Intel had to go back to its earlier design to get something that would not overheat a chip packed with more of the new, smaller, transistors - since they weren't cooler transistors too. To get more performance, they started putting more cores on the chips instead (although they did manage a dual-core based on the Pentium 4 design, the Pentium D). John Savard
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X-Received: by 10.55.48.68 with SMTP id w65mr4771258qkw.10.1520387130427; Tue, 06 Mar 2018 17:45:30 -0800 (PST) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 10.237.62.152 with SMTP id n24ls318970qtf.3.gmail; Tue, 06 Mar 2018 17:45:29 -0800 (PST) X-Received: by 10.237.53.243 with SMTP id d48mr15529313qte.33.1520387129702; Tue, 06 Mar 2018 17:45:29 -0800 (PST) X-Received: by 10.31.67.71 with SMTP id q68mr2306398vka.9.1520387129548; Tue, 06 Mar 2018 17:45:29 -0800 (PST) Path: mbox-mo1.pugleaf.net!a13ni74qtd.1!nntp.google.com!t24no117690qtn.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: alt.folklore.computers Date: Tue, 6 Mar 2018 17:45:29 -0800 (PST) In-Reply-To: <878tb4bxdq.fsf@bogus.nodomain.nowhere> Complaints-To: groups...@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=24.114.26.160; posting-account=1nOeKQkAAABD2jxp4Pzmx9Hx5g9miO8y NNTP-Posting-Host: 24.114.26.160 References: <p74nr9$gq4$1@dont-email.me> <ffmd97F75bdU1@mid.individual.net> <p779gf$vai$1@dont-email.me> <ffopb6F75bdU8@mid.individual.net> <2145632306.541554624.873367.peter_flass-yahoo.com@news.eternal-september.org> <87o9k7bjkq.fsf@usenet.ankman.de> <slrnp9i79j.eu5.grahn+nntp@frailea.sa.invalid> <87zi3o7uaq.fsf@usenet.ankman.de> <6o4m9ddl7ut1sfr88j5ckh6akrbf21lo4b@4ax.com> <e22e33cb-1039-45bd-8876-d1ea470c3eae@googlegroups.com> <b99m9dt3fle04khga664kkiev99313e3dj@4ax.com> <5c29af78-8647-4cec-a1d1-77659c190f32@googlegroups.com> <878tb4bxdq.fsf@bogus.nodomain.nowhere> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <b28b0277-5f09-450d-88e8-99d26c0082a8@googlegroups.com> Subject: Re: BYTE Magazine Pentomino Article From: Quadibloc <jsa...@ecn.ab.ca> Injection-Date: Wed, 07 Mar 2018 01:45:29 +0000 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit