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Path: ...!news.nobody.at!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: David Brown <david.brown@hesbynett.no> Newsgroups: comp.arch Subject: Re: Is Intel exceptionally unsuccessful as an architecture designer? Date: Thu, 19 Sep 2024 20:15:57 +0200 Organization: A noiseless patient Spider Lines: 18 Message-ID: <vchpou$lo31$3@dont-email.me> References: <memo.20240913205156.19028s@jgd.cix.co.uk> <vcd3ds$3o6ae$2@dont-email.me> <2935676af968e40e7cad204d40cafdcf@www.novabbs.org> <2024Sep18.074007@mips.complang.tuwien.ac.at> <vcds4i$3vato$1@dont-email.me> <2024Sep18.220953@mips.complang.tuwien.ac.at> <vcfopr$8glq$3@dont-email.me> <ll232oFs6asU1@mid.individual.net> <vcgr9d$gndp$2@dont-email.me> <ecfb5169ab479116ac0a2c5a3034299a@www.novabbs.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Thu, 19 Sep 2024 20:15:58 +0200 (CEST) Injection-Info: dont-email.me; posting-host="7154b122b43c3b3b561ddb6d5bc48fb0"; logging-data="712801"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19wcfBzYVCOhRm9jn7ntVstna5QwgIbVZU=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Iq/Sj43yjCMDKItOj657reJpjDs= In-Reply-To: <ecfb5169ab479116ac0a2c5a3034299a@www.novabbs.org> Content-Language: en-GB Bytes: 2245 On 19/09/2024 18:18, MitchAlsup1 wrote: > On Thu, 19 Sep 2024 9:35:41 +0000, David Brown wrote: > >> On 19/09/2024 09:44, Niklas Holsti wrote: > >> The practical limitations for quantum computers are far more >> significant. Roughly speaking, when you entangle more states at once, >> you need tighter tolerances to maintain coherence, which translates to >> lower temperatures, higher energy costs, and lower times to do your >> calculations. And to be useful, you need large numbers of qubits, which >> again makes maintaining coherence increasingly difficult. > > One can say exactly the same about PAM4 signaling compared to NRZ or > even RZ coding. Yes. It gets harder to have more signal levels per baud, and you need tighter tolerances, shorter lengths, less electrical noise, etc.