From owner-freebsd-questions@freebsd.org Tue Jul 30 02:21:07 2019 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 4C053BE00D for ; Tue, 30 Jul 2019 02:21:07 +0000 (UTC) (envelope-from pathiaki2@yahoo.com) Received: from sonic310-25.consmr.mail.ne1.yahoo.com (sonic310-25.consmr.mail.ne1.yahoo.com [66.163.186.206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 770F4870FA for ; Tue, 30 Jul 2019 02:21:06 +0000 (UTC) (envelope-from pathiaki2@yahoo.com) X-YMail-OSG: nxJlsLQVM1mzFBAZrnrcsumjzR_ccBXy4JsM4bt2u85HcHzSyjX4lnuXsTVzfqa A8VuZUDTL3dGMhTXfXtpH_yyFwS9AiAI79ixqjBETRpsLuH_f8f.twvRWDOZXmBwu2e.0nmY7N_p et8mTFL9wSSYPdr6vg__e4F79q6jNdc9r0eOmHqxwiSMaVtE4SZqFXUPEgJG0hQzDUn9WHyRloFu HpRcUJpn8Q_C.QD3dRqQtPMBXHUT35K4OncBNO7USAXV94s_YliVgYy0xH7u6btvoQz8CskzoePq t5d75mzUF1Ca8EJkrJvEaUEJMyaKlExY_MVMFkNuy4kGFogvfUiB2faGopVuA5GPYQH9stSs_Pgd x9GxS1eOAG8z0mSYP7G2k4uOCFmvnQwWW8FGWOgRoucvpDND95sRw1idISB2W6TilA5g6Muux8Lc BEu83G70XRWXhf6LSOhLU_LUe2rNwOQ6bcS._1wkoJNwZIZacwfIXc1j8Thy.OtQow1n2zzIJi49 p4Xd_f4_Qif0utOFyhpI5EPANtmIbZxd5wiDQLYh0RPWVApc.MvfGuZA1i5IxD8qzXU9WO9f0PKj koQPwp1G7sI0I9WUR24dz_d978j8yVgMWaq_vlHNpPBp4UyxQaABaXFMiahHp1BnSd1glKA.GgIz OT6mJ6mrSSe9__q80_.r9jDbpX_PN3EzYugfVze0nOzQneS0dXX45VPmGC8Pb9YO8u3ZVSmQFeRa dKL2SPeqYyZiMiXPH6tt4yQPiXZPG9WorBnF4yOslKCp6L.jnArsIvpVnMXBcdbzx.Sr.xG7jdnl .1GB84KeHwqhU14ZAIeFmsf5AxQNIoXwqAbca2B6iZsDNNlVUf3VQSkk1P7iQUJgMj.27dx6ZBFH L0ehPFxWfCXhJ.BLvxji6GuL.SEPaeSJkWlI1g26zRH_5u_1H7E7U9KM6STYMwjGhI_DqQ.6Nq28 1wbBYVfoWBsq0pxrM_66FcGa3B4SB3lcO8i3Ez.FI0WTjhdJCFI5UJ2IC5k7xAcl1qwTzHxR.Dcy t9fWYgMN9LRIAA5A.6.X8pjG3oZqSlKTVsdz4ghsut6XHdCOjWuhSfKCfaUTsxTYIzSbYnq5CxwI dxQtCarfHakRSEI2HaaMU1As_ix4Oi2ZPx4d5i39wQ2kn43sdmAWEPn55txet39qQPFjDL.oDeDG xgl8.99Yu5pojeDfucysEMeSVFrLLkVxZ6uQ1vWkYIhPpoU.jr_FWUm_BRXZrnYayEeNfn1_gE9z XHURs53Gsx0P6fSICDg-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic310.consmr.mail.ne1.yahoo.com with HTTP; Tue, 30 Jul 2019 02:21:04 +0000 Date: Tue, 30 Jul 2019 02:19:58 +0000 (UTC) From: Paul Pathiakis To: freebsd-questions@freebsd.org, Ralf Mardorf Message-ID: <1757593433.2684240.1564453198466@mail.yahoo.com> In-Reply-To: <20190729210007.1be50ad8@moonstudio> References: <5ceb24c1-66ce-2603-5eed-78283d9676b7@holgerdanske.com> <23861.63968.885139.970960@jerusalem.litteratus.org> <1618173539.5511975.1563822072600@mail.yahoo.com> <1125579496.1306494.1563881223475@mail.yahoo.com> <20190723173126.2a26ee26@archlinux> <20190723204435.51c334d6@archlinux> <20190723235405.761f1663@gumby.homeunix.com> <1017844498.2766939.1564400418639@mail.yahoo.com> <699480245e5ffd26d5fb8b34efc8272a@fechner.net> <20190729210007.1be50ad8@moonstudio> Subject: Re: Best hardware for a replacement desktop? MIME-Version: 1.0 X-Mailer: WebService/1.1.13991 YMailNorrin Mozilla/5.0 (X11; FreeBSD amd64; rv:58.0) Gecko/20100101 Firefox/58.0 X-Rspamd-Queue-Id: 770F4870FA X-Spamd-Bar: ++++ X-Spamd-Result: default: False [4.12 / 15.00]; ARC_NA(0.00)[]; NEURAL_SPAM_LONG(1.00)[1.000,0]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; FREEMAIL_FROM(0.00)[yahoo.com]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; RCVD_TLS_LAST(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; NEURAL_SPAM_MEDIUM(0.99)[0.992,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.96)[0.964,0]; DKIM_TRACE(0.00)[yahoo.com:+]; MX_GOOD(-0.01)[cached: mta6.am0.yahoodns.net]; RCVD_IN_DNSWL_NONE(0.00)[206.186.163.66.list.dnswl.org : 127.0.5.0]; RCPT_COUNT_TWO(0.00)[2]; IP_SCORE(1.17)[ip: (3.63), ipnet: 66.163.184.0/21(1.27), asn: 36646(1.02), country: US(-0.05)]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:36646, ipnet:66.163.184.0/21, country:US]; MIME_TRACE(0.00)[0:+,1:+]; DWL_DNSWL_NONE(0.00)[yahoo.com.dwl.dnswl.org : 127.0.5.0] Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jul 2019 02:21:07 -0000 Interesting. Just not into asking for justification just saying it's nonsense? I use a very simple 'at the wall' draw meter.=C2=A0 Over time, when things = used to consume a LOT more power.... CPUs could draw 250W, DDR3, etc=C2=A0 = As you added higher end graphics cards, they would increase the draw furthe= r..... now, if you've ever done benchmarking, you'd find that you, typicall= y, throw out the first 3 runs.=C2=A0 Why?=C2=A0 Heat yields increased resis= tance.=C2=A0 Increasing memory, a higher end graphics card, a higher speed = clock on the same micro-architecture, etc Things are in flux until the mach= ine comes up to full operating temperature. So, depending on the number of peripherals.... maybe a second graphics card= if you want dual monitors, you have some incredible protein folding softwa= re that requires gobs of memory.... or a filesystem of ZFS that loves more = memory, etc.=C2=A0 Add in more memory... more draw... Do you see a pattern with what I'm saying? Today, we see that high-energy efficiency is being pushed everywhere.... th= e CPU ( TDP dropping from 300 to 180 to 140 to 100 to 65 ), the GPU ( TDP d= ropping from 300W to 250W to 170W) , the memory (in case you didn't notice = the voltage requirements dropping from 1.75 to 1.5 to 1.35 over the last 5-= 7 years....) So, when I know I could potentially plug in second graphics card, fill all = my memory slots, overclock a CPU (for only temporary reasons... ), my obser= vations of the last 10 years or so, even through all these changes, was sho= wing a high of about 40-45% over the base to where it is now, about 30-35% = of the base. And, again, despite all of this, I still won't overspend for something that= makes no sense and I will, appropriately, size a PSU to my baseline needs = while leaving a good amount of headroom for expansion. I also consider the 80-Plus standards that have been implemented.=C2=A0 I r= eally don't want to hit more than 80-85% of my PSU's upper bound as that se= ems to be why the standard was created.... drop off of the efficiency of po= wer delivery.=C2=A0 Although the higher standards of gold, platinum and tit= anium tend to push that envelope of efficiency upwards to 90%=C2=A0 The eff= iciency of most modern PSUs hit a peak of efficiency around 60% (that may b= e outdated).=C2=A0 You would really like to have you machine drawing around= there.=C2=A0 However, as I said, I tend to allow for enough headroom to pl= ug-in additional peripherals if needed.=20 If you read between the lines of the above, you can figure out why you DON'= T oversize if unnecessary.=C2=A0 If you only draw 300W (there is a doubling= factor of AC/DC conversion - I haven't checked if that's still viable as I= don't have time to check all these factors), why buy a 1200W PSU?=C2=A0 On= ly $50 more?=C2=A0 If you want to spend that money, sure, whatever.=C2=A0 I= f you want to be at the peak of efficiency and be 'green', you can be at yo= ur 'most efficient' by being at the peak of your power curve that the PSU d= elivers.... so, at 1200W... you'd need to be drawing what?=C2=A0 720W ??!! (so... what's that?=C2=A0 3x1070ti, 4x8GB of RAM, some ridiculous high-end = Intel chip that sucks down 300W at TDP...=C2=A0 Yeah, if you want to spend = $5000 on a machine, then, by all means, spend that $50 on that 1200W PSU) This was what was meant when someone replied that they have different load = curves.=C2=A0 (and, no, I really didn't want to have to write this letter..= ..) Oh... and yeah... I let my little meter calculate my draw after looking at = the specs and building the machine.... I'm fairly close.=C2=A0 Also, there = are a TON of PSU calculators out there and a LOT of articles about why you = don't over-size. P On Monday, July 29, 2019, 7:49:42 PM EDT, Ralf Mardorf via freebsd-ques= tions wrote: =20 =20 On Tue, 23 Jul 2019 11:27:03 +0000 (UTC), Paul Pathiakis wrote: >Take that and add 33%. On Tue, 23 Jul 2019 17:31:26 +0200, I wrote: >I would be careful when calculating real power consumption. What makes >you think that adding 33% is a good value? On Mon, 29 Jul 2019 14:30:10 +0200, Matthias Fechner wrote: >If you under or over 50% you will lose efficiency. Again, oversized is way better, since calculating a realistic power consumption is virtually impossible and it's also virtually impossible to know the optimal workload of a power supply. Actually you only could use specifications provided by the vendors. In the end you get a rough guess on the values. What are 33% or 50% of rough estimated values? The result is mere nonsense. _______________________________________________ freebsd-questions@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org= " =20 From owner-freebsd-questions@freebsd.org Tue Jul 30 02:51:01 2019 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B1BE1BEA33 for ; Tue, 30 Jul 2019 02:51:01 +0000 (UTC) (envelope-from aryeh.friedman@gmail.com) Received: from mail-io1-xd33.google.com (mail-io1-xd33.google.com [IPv6:2607:f8b0:4864:20::d33]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EB8EC87EE8 for ; Tue, 30 Jul 2019 02:51:00 +0000 (UTC) (envelope-from aryeh.friedman@gmail.com) Received: by mail-io1-xd33.google.com with SMTP id z3so5919354iog.0 for ; Mon, 29 Jul 2019 19:51:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=boRgyw5Ko/kXD4o+lio9yD2JtwN9EduXVOev4oIjEao=; b=jmAeEtg/VI5gTlr1TWi2tNuO+bS85ODGp3L/l90r+NuSak3YryfTMImqVJCUwxMjn0 YBt3HwUwDvShCMPoOaJUbK98yMlOoLkoRhCFCd0mnpGtkE9y67MhgqIVp/a/kUqgnBuZ aj+9mtPVdYvBLZKTtN9sGO1Mc4OiaJ6HMrgpNV6O/CWnfL6DRpYGtHeicwoWSPhE/SYj noHc0q7dC/jF4E1czEbOwSZyJyCMtm5raB+GkeUYDs9aBvhTqB2dAGx5trKpzJyzH9P9 eNTBREM5p2MWRpcJqhxs7kVpi5m3tmX1YTfUNYov9hRk8XUqRWxKG0J1/CtrciglbMh+ f7uQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=boRgyw5Ko/kXD4o+lio9yD2JtwN9EduXVOev4oIjEao=; b=m/iZYzYh0yJAhNkRVhxN7VS/BlkIVO5s7+htfie7lguAQQdCzCqelzao2KWbSGZ0Tq 09lSEjVet4W2CsgxxvF5KJ8/lIku+OuUXeZJlZt0bUcOooSfqpkyKK0edrcWxBGBOOR8 a4lJ3uXfzQ6o9EIWvPPuJW5Y19WkXYatAqEfmUyK917kpgF+/HGPSGrx8HZG8IJBhP3t DCCb81fqkqSwEwQpQN5VDM1ZDf56aiuxNTXy9E8PzJVTf34eK2OXBXO3BFspvue02WPQ RjXM4X7hnMWh7PjrGsHa1YcVBLhvdOu8BW4MJPG7C9ax42l24DXLuU/5t467hWhOtb5b Y0Dg== X-Gm-Message-State: APjAAAWyn9ROihS7BeBPh8aC2KTiqVOzVlAZ5o1pdXJKwOZ38N3vqU9I jKMFZM35Xmxr39uSL7tHllQdoV02pJURlIxhPH7DerwOc0k= X-Google-Smtp-Source: APXvYqw4y0JvFNHvzSUknfwOdM8/jveSHH9UDdNYzfJSapCUf1Q+tgtw1KwKZgylCHGX3xTnYRgSUeH7lfRH9t+tmfc= X-Received: by 2002:a02:a183:: with SMTP id n3mr121270224jah.74.1564455060234; Mon, 29 Jul 2019 19:51:00 -0700 (PDT) MIME-Version: 1.0 References: <5ceb24c1-66ce-2603-5eed-78283d9676b7@holgerdanske.com> <23861.63968.885139.970960@jerusalem.litteratus.org> <1618173539.5511975.1563822072600@mail.yahoo.com> <1125579496.1306494.1563881223475@mail.yahoo.com> <20190723173126.2a26ee26@archlinux> <20190723204435.51c334d6@archlinux> <20190723235405.761f1663@gumby.homeunix.com> <1017844498.2766939.1564400418639@mail.yahoo.com> <699480245e5ffd26d5fb8b34efc8272a@fechner.net> <20190729210007.1be50ad8@moonstudio> <1757593433.2684240.1564453198466@mail.yahoo.com> In-Reply-To: <1757593433.2684240.1564453198466@mail.yahoo.com> From: Aryeh Friedman Date: Mon, 29 Jul 2019 22:50:48 -0400 Message-ID: Subject: Re: Best hardware for a replacement desktop? To: Paul Pathiakis Cc: FreeBSD Mailing List , Ralf Mardorf X-Rspamd-Queue-Id: EB8EC87EE8 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=jmAeEtg/; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of aryehfriedman@gmail.com designates 2607:f8b0:4864:20::d33 as permitted sender) smtp.mailfrom=aryehfriedman@gmail.com X-Spamd-Result: default: False [-4.63 / 15.00]; FREEMAIL_FROM(0.00)[gmail.com]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-0.87)[-0.875,0]; FREEMAIL_TO(0.00)[yahoo.com]; FROM_EQ_ENVFROM(0.00)[]; IP_SCORE(-1.74)[ip: (-3.12), ipnet: 2607:f8b0::/32(-3.10), asn: 15169(-2.45), country: US(-0.05)]; MIME_TRACE(0.00)[0:+,1:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; TAGGED_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.997,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[3.3.d.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; SUBJECT_ENDS_QUESTION(1.00)[]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_LAST(0.00)[] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jul 2019 02:51:01 -0000 Just to make stuff concrete here is what I finally settled on (typing this reply as my first email sent on the new machine).... I am top posting since it is not really inline with the PSU debate except for the fact I bought the one the store recommended (smaller then the one I originally planned on)... Item Price Comments -------------------------------------------------------------------------------------------- MSI B450 Tomahawk (motherboard) 85 No complaints beyond not very clear instructions about what screws to use for what purpose and the manual has the build order wrong IMO (attach everything before putting in case).... vmm(4) loads fine have not yet tried bhyve/vbox yet AMD Ryzen 5 2600 (6 cores/12 threads) 120 WOW!!!! Much better then I hoped (FreeBSD considers each thread to be a separate core so I have 12 cores for less then I would have paid for a quad core/quad thread Intel).... make -j 12 DESTDIR=/ world kernel took 30 mins on the dot (compared to 3 hrs on my old machine)... compiled xfce/firefox and a few extras in about 2 hrs compared to 10 to 12 on the old machine Inland 224 GB SSD SATA/3 (OEM) 25 No complaints PowerSpec 750W semi-modular PSU 60 Semi-modular is annoying due to the build order suggested in MB manual and the case design Thermaltake V100 Minitower Case 40 Who ever designed this piece of crap should be shot for awful case design (almost nothing is easy to get to inside and the manual is completely useless... whose bright idea was it to put the drive/PSU bays in a separate caged off area with solid metal between it and the main bay?!?!?.... hard to snake cables in and out and very little room for working when putting stuff in) Crucial DDR4-2666 4GB non-ECC RAM 35 RAM is RAM Kept Nvidia GT 710 video card Starbucks Mocha Cap. 3 Caffeine makes the world run on time! Total wo/ tax (and coffee) 365 So far works perfectly with 12.0-RELEASE (AMD64) On Mon, Jul 29, 2019 at 10:21 PM Paul Pathiakis via freebsd-questions < freebsd-questions@freebsd.org> wrote: > Interesting. > > Just not into asking for justification just saying it's nonsense? > > I use a very simple 'at the wall' draw meter. Over time, when things used > to consume a LOT more power.... CPUs could draw 250W, DDR3, etc As you > added higher end graphics cards, they would increase the draw further..... > now, if you've ever done benchmarking, you'd find that you, typically, > throw out the first 3 runs. Why? Heat yields increased resistance. > Increasing memory, a higher end graphics card, a higher speed clock on the > same micro-architecture, etc Things are in flux until the machine comes up > to full operating temperature. > > So, depending on the number of peripherals.... maybe a second graphics > card if you want dual monitors, you have some incredible protein folding > software that requires gobs of memory.... or a filesystem of ZFS that loves > more memory, etc. Add in more memory... more draw... > > Do you see a pattern with what I'm saying? > > Today, we see that high-energy efficiency is being pushed everywhere.... > the CPU ( TDP dropping from 300 to 180 to 140 to 100 to 65 ), the GPU ( TDP > dropping from 300W to 250W to 170W) , the memory (in case you didn't notice > the voltage requirements dropping from 1.75 to 1.5 to 1.35 over the last > 5-7 years....) > So, when I know I could potentially plug in second graphics card, fill all > my memory slots, overclock a CPU (for only temporary reasons... ), my > observations of the last 10 years or so, even through all these changes, > was showing a high of about 40-45% over the base to where it is now, about > 30-35% of the base. > > And, again, despite all of this, I still won't overspend for something > that makes no sense and I will, appropriately, size a PSU to my baseline > needs while leaving a good amount of headroom for expansion. > > I also consider the 80-Plus standards that have been implemented. I > really don't want to hit more than 80-85% of my PSU's upper bound as that > seems to be why the standard was created.... drop off of the efficiency of > power delivery. Although the higher standards of gold, platinum and > titanium tend to push that envelope of efficiency upwards to 90% The > efficiency of most modern PSUs hit a peak of efficiency around 60% (that > may be outdated). You would really like to have you machine drawing around > there. However, as I said, I tend to allow for enough headroom to plug-in > additional peripherals if needed. > > If you read between the lines of the above, you can figure out why you > DON'T oversize if unnecessary. If you only draw 300W (there is a doubling > factor of AC/DC conversion - I haven't checked if that's still viable as I > don't have time to check all these factors), why buy a 1200W PSU? Only $50 > more? If you want to spend that money, sure, whatever. If you want to be > at the peak of efficiency and be 'green', you can be at your 'most > efficient' by being at the peak of your power curve that the PSU > delivers.... so, at 1200W... you'd need to be drawing what? 720W ??!! > > (so... what's that? 3x1070ti, 4x8GB of RAM, some ridiculous high-end > Intel chip that sucks down 300W at TDP... Yeah, if you want to spend $5000 > on a machine, then, by all means, spend that $50 on that 1200W PSU) > > This was what was meant when someone replied that they have different load > curves. (and, no, I really didn't want to have to write this letter....) > > Oh... and yeah... I let my little meter calculate my draw after looking at > the specs and building the machine.... I'm fairly close. Also, there are a > TON of PSU calculators out there and a LOT of articles about why you don't > over-size. > > P > > On Monday, July 29, 2019, 7:49:42 PM EDT, Ralf Mardorf via > freebsd-questions wrote: > > On Tue, 23 Jul 2019 11:27:03 +0000 (UTC), Paul Pathiakis wrote: > >Take that and add 33%. > > On Tue, 23 Jul 2019 17:31:26 +0200, I wrote: > >I would be careful when calculating real power consumption. What makes > >you think that adding 33% is a good value? > > On Mon, 29 Jul 2019 14:30:10 +0200, Matthias Fechner wrote: > >If you under or over 50% you will lose efficiency. > > Again, oversized is way better, since calculating a realistic power > consumption is virtually impossible and it's also virtually impossible > to know the optimal workload of a power supply. Actually you only could > use specifications provided by the vendors. In the end you get a rough > guess on the values. > > What are 33% or 50% of rough estimated values? The result is mere > nonsense. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > -- Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org