Ryzen 9 5000 series processor

By: Brett (ggtgp.delete@this.yahoo.com), January 4, 2021 5:08 pm
Room: Moderated Discussions
Jason Snyder (jmcsnyder.delete@this.hotmail.com) on January 4, 2021 1:44 pm wrote:
> I was kind of surprised when Linus Torvalds went for a Threadripper with only ECC UDIMM support
> (with UDIMMS being so hard to find) and the other Linus (Sebastian) didn't even use ECC RAM when
> building the system for Torvalds. It seemed like the hot setup would have been to go Epyc, use
> RDIMMS, and decouple RAM speed from Infinity Fabric speed to get top performance as you are not
> going to find ECC DIMMs that are fast enough to make sense to use the default 1:1 clock ratio.
>
> Also if you really want quiet without a heat sink so big on top of the CPU that it will detach from the motherboard
> while still attached to its chunk of motherboard (at least a problem I have had when shipping via UPS, though
> never a problem with FedEx for me), there is something to say about liquid cooling, at least with the right cooling
> solution selected. Just if you go with a custom loop, go for clear (die free) coolant unless aesthetics matter
> more than function as the clear stuff with the right metals in the loop (never mix copper and aluminum parts
> for example) won't gum up as fast. Then again I suppose with AMD Epyc you could select a processor with lots
> of thermal headroom and just scale back the fan speed. The other problem with going with Intel is they tend
> to have a very high temperature delta between the die and IHS under load, leaving little headroom for the cooler
> to do its job, so you end up really ramping up your cooling solution so the plate on it is as close to ambient
> as possible. However if you have the right AMD Epyc under the hood, the plate on the cooler can be relatively
> hot (compared to a proper Intel solution) and it is OK because the temperature delta between the die and the
> IHS is relatively small. This is as in going for a high core count (many cores to spread the heat generation
> across), low clock speed, low TDP (for the core count) CPU. AMD tends to use a solder for the heat transfer
> material, which is bad for the large dies Intel uses as the large dies tend to micro-fracture and fail prematurely
> due to differential heat expansion between the die and hard solder, but AMDs multiple smaller dies tend to fair
> better. The cheap TIM thermal paste Intel tends to use has poor heat transfer capability, so in addition to
> jamming more power into fewer cores, the heat transfer off of those cores is poor.
>
> This leads to another point, I have had Intel CPUs with solder go bad because I had my windows open for
> cross ventilation when the outside air turned out to be very badly polluted and gummed up the cooler
> with black, sticky stuff in almost no time flat, causing the CPU to get to 100C (and landing me in the
> hospital at about the same time because I couldn't breath). After the 100C event, I took measures to
> keep the cooling solution from failing like that again (and to keep my lungs from failing due to bad
> air quality outside), but the CPU never worked reliably again and I had to replace it. (Unfortunately
> I can't get replacement lungs.)

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> So ECC RAM is not the whole picture. How the computer is cooled is
> also a big deal and a CPU running too hot and developing micro-fractures will also ruin your day.
>
>
> Linus Torvalds (torvalds.delete@this.linux-foundation.org) on January 2, 2021 12:21 pm wrote:
> > Jukka Larja (roskakori2006.delete@this.gmail.com) on January 1, 2021 10:28 pm wrote:
> > >
> > > So yeah, I do very much agree AMD has superior offering. ECC doesn't really matter here though.
> >
> > ECC absolutely matters.
> >
> > ECC availability matters a lot - exactly because Intel has been instrumental in
> > killing the whole ECC industry with it's horribly bad market segmentation.
> >
> > Go out and search for ECC DIMMs - it's really hard to find. Yes - probably entirely thanks
> > to AMD - it may have been gotten slightly better lately, but that's exactly my point.
> >
> > Intel has been detrimental to the whole industry and to users because
> > of their bad and misguided policies wrt ECC. Seriously.
> >
> > And if you don't believe me, then just look at multiple generations of rowhammer, where each
> > time Intel and memory manufacturers bleated about how it's going to be fixed next time.
> >
> > Narrator: "No it wasn't".
> >
> > And yes, that was - again - entirely about the misguided and arse-backwards policy
> > of "consumers don't need ECC", which made the market for ECC memory go away.
> >
> > The arguments against ECC were always complete and utter garbage. Now even the memory manufacturers are
> > starting do do ECC internally because they finally owned up to the fact that they absolutely have to.
> >
> > And the memory manufacturers claim it's because of economics and lower power. And they are
> > lying bastards - let me once again point to row-hammer about how those problems have existed
> > for several generations already, but these f*ckers happily sold broken hardware to consumers
> > and claimed it was an "attack", when it always was "we're cutting corners".
> >
> > How many times has a row-hammer like bit-flip happened just by pure bad luck on real
> > non-attack loads? We will never know. Because Intel was pushing shit to consumers.
> >
> > And I absolutely guarantee they happened. The "modern DRAM is so reliable that it doesn't need ECC"
> > was always a bedtime story for children that had been dropped on their heads a bit too many times.
> >
> > We have decades of odd random kernel oopses that could never be explained and were likely due to
> > bad memory. And if it causes a kernel oops, I can guarantee that there are several orders of magnitude
> > more cases where it just caused a bit-flip that just never ended up being so critical.
> >
> > Yes, I'm pissed off about it. You can find me complaining about this literally for decades
> > now. I don't want to say "I was right". I want this fixed, and I want ECC.
> >
> > And AMD did it. Intel didn't.
> >
> > > I don't really see AMD's unofficial ECC support being a big deal.
> >
> > I disagree. The difference between "the market for working memory actually exists" and "screw
> > consumers over by selling them subtly unreliable hardware" is an absolutely enormous one.
> >
> > And the fact that it's "unofficial" for AMD doesn't matter. It works. And it allows
> > the markets to - admittedly probably very slowly - start fixing themselves.
> >
> > But I blame Intel, because they were the big fish in the pond, and they were the
> > ones that caused the ECC market to basically implode over a couple of decades.
> >
> > ECC DRAM (or just parity) used to be standard and easily accessible back when. ECC
> > and parity isn't a new thing. It was literally killed by bad Intel policies.
> >
> > And don't let people tell you that DRAM got so reliable that it
> > wasn't needed. That was never ever really true. See above.
> >
> > Linus
>
>

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TopicPosted ByDate
Ryzen 9 5000 series processor Phil9955112020/12/29 05:12 AM
  Ryzen 9 5000 series processor Adrian2020/12/29 07:31 AM
    Ryzen 9 5000 series processor Dummond D. Slow2020/12/29 10:33 AM
      Ryzen 9 5000 series processor Phil9955112020/12/29 04:09 PM
        Ryzen 9 5000 series processor Dummond D. Slow2020/12/29 06:00 PM
          Ryzen 9 5000 series processor anon2020/12/30 02:50 AM
          Ryzen 9 5000 series processor Foo_2020/12/30 02:50 AM
            Ryzen 9 5000 series processor Phil9955112020/12/30 05:22 AM
              Ryzen 9 5000 series processor Phil9955112020/12/30 05:25 AM
              Ryzen 9 5000 series processor Adrian2020/12/30 06:00 AM
            Ryzen 9 5000 series processor Linus Torvalds2020/12/30 12:00 PM
              Ryzen 9 5000 series processor Phil9955112020/12/31 06:45 AM
                Ryzen 9 5000 series processor Adrian2020/12/31 09:49 AM
                Ryzen 9 5000 series processor Linus Torvalds2020/12/31 12:05 PM
                  Ryzen 9 5000 series processor me2020/12/31 04:56 PM
                    Ryzen 9 5000 series processor Anon2020/12/31 05:48 PM
                      Ryzen 9 5000 series processor me2021/01/01 04:06 AM
                    Ryzen 9 5000 series processor Gabriele Svelto2021/01/01 07:10 AM
                      Ryzen 9 5000 series processor David Hess2021/01/01 07:37 AM
                        Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:52 AM
                          Ryzen 9 5000 series processor Linus Torvalds2021/01/01 12:48 PM
                            Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:28 PM
                              Ryzen 9 5000 series processor Linus Torvalds2021/01/02 12:21 PM
                                Ryzen 9 5000 series processor Adrian2021/01/02 01:17 PM
                                Ryzen 9 5000 series processor Anon2021/01/02 06:08 PM
                                Ryzen 9 5000 series processor Jukka Larja2021/01/02 11:10 PM
                                  Ryzen 9 5000 series processor David Hess2021/01/03 01:03 AM
                                    Ryzen 9 5000 series processor Jukka Larja2021/01/03 03:28 AM
                                  Threadrippers do have official ECC supportJukka Larja2021/01/03 08:32 PM
                                    Threadrippers do have official ECC supportBjörn Ragnar Björnsson2021/01/04 08:21 AM
                                ECC (or lack of)Tim McCaffrey2021/01/03 09:28 AM
                                  ECC (or lack of)Adrian2021/01/03 01:14 PM
                                    ECC (or lack of)Yuhong Bao2021/01/03 01:51 PM
                                      ECC (or lack of)Yuhong Bao2021/01/04 06:54 PM
                                        ECC (or lack of)Yuhong Bao2021/01/04 07:04 PM
                                AMD ECC not enabled but says it isIan Cutress2021/01/03 11:09 AM
                                  AMD ECC not enabled but says it isMaxwell2021/01/03 12:28 PM
                                  AMD ECC not enabled but says it isAdrian2021/01/03 12:50 PM
                                    AMD ECC not enabled but says it isGabriele Svelto2021/01/03 01:08 PM
                                      AMD ECC not enabled but says it isAdrian2021/01/03 01:34 PM
                                        AMD ECC not enabled but says it isDan Strother2021/01/03 07:00 PM
                                          AMD ECC not enabled but says it isMatt2021/01/04 12:29 AM
                                          AMD ECC not enabled but says it isGabriele Svelto2021/01/04 01:29 AM
                                            AMD ECC not enabled but says it isMatt2021/01/04 12:39 PM
                                          AMD ECC not enabled but says it isAdrian2021/01/04 05:49 AM
                                Ryzen 9 5000 series processor Jason Snyder2021/01/04 01:44 PM
                                  Ryzen 9 5000 series processor Brett2021/01/04 05:08 PM
                                  Ryzen 9 5000 series processor Linus Torvalds2021/01/05 12:29 PM
                                    Ryzen 9 5000 series processor Adrian2021/01/05 01:08 PM
                                    Ryzen 9 5000 series processor Emil Briggs2021/01/05 04:40 PM
                                      Ryzen 9 5000 series processor Gabriele Svelto2021/01/06 01:12 AM
                                    Ryzen 9 5000 series processor [ECC summary - Suitable for framing]Björn Ragnar Björnsson2021/01/05 06:29 PM
                                    Ryzen 9 5000 series processor 2021/01/06 09:45 AM
                                      Ryzen 9 5000 series processor Linus Torvalds2021/01/06 11:38 AM
                                        Ryzen 9 5000 series processor Emanuel Rylke2021/01/07 12:49 AM
                                          Ryzen 9 5000 series processor Jörn Engel2021/01/07 09:05 AM
                                            Read Only Page CorrectionsTerry Gray2021/01/07 09:47 AM
                                              Read Only Page Correctionsrwessel2021/01/07 11:00 AM
                                                Read Only Page CorrectionsTerry Gray2021/01/07 11:58 AM
                                              Read Only Page CorrectionsDavid Hess2021/01/10 07:37 PM
                                              Read Only Page Correctionsdmcq2021/01/11 03:32 AM
                                        Ryzen 9 5000 series processor Chester2021/01/07 05:00 AM
                                          Ryzen 9 5000 series processor Gabriele Svelto2021/01/07 05:33 AM
                                            Ryzen 9 5000 series processor Michael S2021/01/07 08:05 AM
                                              Ryzen 9 5000 series processor Linus Torvalds2021/01/07 10:26 AM
                                            Ryzen 9 5000 series processor rwessel2021/01/07 09:06 AM
                                          Ryzen 9 5000 series processor Linus Torvalds2021/01/07 10:04 AM
                                            Ryzen 9 5000 series processor Chester2021/01/07 04:19 PM
                                              OT L1 chache ECCMichael S2021/01/08 02:31 AM
                                                OT L1 chache ECCAdrian2021/01/08 08:54 AM
                                                  OT L1 chache ECCDavid Kanter2021/01/08 09:13 AM
                                                    Structure ProtectionsChester2021/01/08 02:14 PM
                                            Ryzen 9 5000 series processor Etienne Lorrain2021/01/08 01:18 AM
                                          Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 05:42 PM
                                            Ryzen 9 5000 series processor Chester2021/01/07 08:14 PM
                                              Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 08:26 PM
                                                Ryzen 9 5000 series processor Michael S2021/01/08 02:49 AM
                                    Ryzen 9 5000 series processor Jason Snyder2021/01/14 07:32 AM
                                      Ryzen 9 5000 series processor Gabriele Svelto2021/01/15 05:26 AM
                                        Ryzen 9 5000 series processor Jason Snyder2021/01/16 10:45 AM
                                          Ryzen 9 5000 series processor Jason Snyder2021/01/16 12:27 PM
                              Ryzen 9 5000 series processor Etienne Lorrain2021/01/07 01:21 AM
                                Ryzen 9 5000 series processor anon2021/01/07 02:21 AM
                                  Ryzen 9 5000 series processor Etienne Lorrain2021/01/07 03:22 AM
                                    Ryzen 9 5000 series processor Konrad Schwarz2021/01/07 05:27 AM
                                  Ryzen 9 5000 series processor Adrian2021/01/07 04:22 AM
                                  Ryzen 9 5000 series processor rwessel2021/01/07 09:25 AM
                                    Ryzen 9 5000 series processor Jörn Engel2021/01/07 04:29 PM
                                      Ryzen 9 5000 series processor rwessel2021/01/07 06:47 PM
                                        Ryzen 9 5000 series processor David Hess2021/01/11 04:26 AM
                                          Ryzen 9 5000 series processor Adrian2021/01/11 05:25 AM
                                          Ryzen 9 5000 series processor rwessel2021/01/11 07:24 AM
                                      Ryzen 9 5000 series processor Mark Roulo2021/01/07 07:00 PM
                                        Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 07:20 PM
                                  Ryzen 9 5000 series processor David Hess2021/01/11 04:16 AM
                      Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:43 AM
                        Ryzen 9 5000 series processor David Hess2021/01/01 12:31 PM
                          Ryzen 9 5000 series processor Dan Strother2021/01/01 01:12 PM
                        Ryzen 9 5000 series processor Adrian2021/01/01 01:28 PM
                          Ryzen 9 5000 series processor vs. M1Adrian2021/01/02 02:45 AM
                            Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/02 12:50 PM
                              Ryzen 9 5000 series processor vs. M1Adrian2021/01/02 02:00 PM
                                Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/04 12:11 PM
                            Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/07 10:43 AM
                              Ryzen 9 5000 series processor vs. M1Adrian2021/01/08 08:28 AM
                                Ryzen 9 5000 series processor vs. M1 Sorry, typo, correction hereAdrian2021/01/08 08:31 AM
                                  Ryzen 9 5000 series processor vs. M1 (vs. Rocket Lake)Dummond D. Slow2021/01/22 07:02 AM
                            isn't that an interesting contradiction?hobold2021/01/08 12:44 PM
                              isn't that an interesting contradiction?Maynard Handley2021/01/08 01:27 PM
                              isn't that an interesting contradiction?Adrian2021/01/08 02:21 PM
                                isn't that an interesting contradiction?Maynard Handley2021/01/08 03:59 PM
                                  isn't that an interesting contradiction?Maynard Handley2021/01/08 04:34 PM
                                    isn't that an interesting contradiction?Maynard Handley2021/01/08 04:34 PM
                                    isn't that an interesting contradiction?Maynard Handley2021/01/08 04:35 PM
                                      isn't that an interesting contradiction?Adrian2021/01/09 12:55 AM
                                  isn't that an interesting contradiction?Adrian2021/01/09 12:48 AM
                                    isn't that an interesting contradiction? - gmpAdrian2021/01/09 08:00 AM
                                      isn't that an interesting contradiction? - gmpnone2021/01/11 01:26 AM
                                        isn't that an interesting contradiction? - gmpAdrian2021/01/11 04:34 AM
                                          Fully agree with you, I was just giving some data :-) (NT)none2021/01/11 05:17 AM
                                          isn't that an interesting contradiction? - gmpanon2021/01/11 12:09 PM
                                            isn't that an interesting contradiction? - gmpAdrian2021/01/12 12:54 AM
                                              isn't that an interesting contradiction? - gmpnone2021/01/12 01:15 AM
                                                isn't that an interesting contradiction? - gmpAdrian2021/01/12 03:37 AM
                                                  isn't that an interesting contradiction? - gmpnone2021/01/12 03:53 AM
                                                    uses of int multiplyhobold2021/01/12 02:51 PM
                                                      uses of int multiplynone2021/01/13 01:11 AM
                                                      uses of int multiplyJörn Engel2021/01/13 12:06 PM
                                                  isn't that an interesting contradiction? - gmpWilco2021/01/12 04:17 AM
                                                    isn't that an interesting contradiction? - gmpAdrian2021/01/12 05:07 AM
                        Ryzen 9 5000 series processor Gabriele Svelto2021/01/01 03:31 PM
                          Ryzen 9 5000 series processor Jukka Larja2021/01/01 09:58 PM
                            Ryzen 9 5000 series processor Gabriele Svelto2021/01/02 05:51 AM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 07:57 AM
                                Ryzen 9 5000 series processor me2021/01/02 04:30 PM
                                  Ryzen 9 5000 series processor Jukka Larja2021/01/02 10:43 PM
                        Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/01 08:41 PM
                          Ryzen 9 5000 series processor Jukka Larja2021/01/01 09:53 PM
                            Ryzen 9 5000 series processor Adrian2021/01/02 01:03 AM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 07:39 AM
                          Ryzen 9 5000 series processor Adrian2021/01/02 12:52 AM
                          Ryzen 9 5000 series processor me2021/01/02 05:56 AM
                            Ryzen 9 5000 series processor Michael S2021/01/02 11:41 AM
                              Ryzen 9 5000 series processor Adrian2021/01/02 12:43 PM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 10:50 PM
                          Crucial/Micron ECC UDIMMsGabriele Svelto2021/01/02 06:09 AM
                            Crucial/Micron ECC UDIMMsMaxwell2021/01/02 09:45 AM
                              Crucial/Micron ECC UDIMMsYuhong Bao2021/01/02 06:29 PM
                  Ryzen 9 5000 series processor Phil9955112021/01/03 07:46 AM
  Ryzen 9 5000 series processor H_Heckuba2021/01/03 12:06 PM
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