It is my understanding that to "maximize" production you need to run at the highest sustainable overclock.

And to maximize efficient production you run at the maximum non-turbo speed.

https://www.tomshardware.com/reviews/ryzen-9-3900x-7-3700x-review,6214-3.html

This is a fragment of a report that predates the 3950x but includes the 3900x.

It comes down on an 3700x as having the most power efficiency.

Tom

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A proud member of the OFA (Old Farts Association).

How much a bit of playing with the core voltage and VID voltage of the CPU can matter. My 3900X ran 54C at idle, at the stock VID (auto = 1.45V) and stock VCore (auto = 0.9-1.5V), 74C on 11 cores running various tasks under BOINC.

I set VCore to 1.2V, VID to 1.1V and am now running those 11 cores at a max of 55C. Can't even hear the fans on my cooling this way.
(VID is what you want the CPU to use, VCore is the max it can use)

Yes, when you run on Auto, it provides way too much Vcore voltage on the chance it can boost a core or two up to the max coreboost. When you want to run a lot of cores all the time, you can drop your Vcore down considerably and not run any kind of boost. Best way to find out where to run the Vcore is to try and run all cores on Auto on some long computational load that utilizes all the cores and see where the cpu frequency settles out under your cpu cooling mechanism and at what Vcore value that took. That frequency and Vcore is then your target to set your all core clock and voltage to.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

Played around with the voltages the past day and a half. Trouble is, when I manually set voltages in the BIOS, it locks the clockspeed in place. So either I set the speed to something high (say 4050) and then the CPU constantly runs at that speed, or I leave it at base speed (3800) but then no boost.

So I went back to leaving voltages on Auto and instead set the CPU Core Voltage to an offset of -0.1V. That results in still having the boost, yet lower temperatures all around. Core Voltage runs at 1.264V, VID at 1.300-1.325V

Played around with the voltages the past day and a half. Trouble is, when I manually set voltages in the BIOS, it locks the clockspeed in place. So either I set the speed to something high (say 4050) and then the CPU constantly runs at that speed, or I leave it at base speed (3800) but then no boost.

So I went back to leaving voltages on Auto and instead set the CPU Core Voltage to an offset of -0.1V. That results in still having the boost, yet lower temperatures all around. Core Voltage runs at 1.264V, VID at 1.300-1.325V

That works too with a negative offset. The best way to run if you don't want to burn power when the PC is just idling. But if you are intent on using all the cores in cpu compute, you can usually run a lot lower voltage than what Auto shoves. Using a negative offset still is beneficial but you don't get as much reduction in Vcore than what you can achieve in manual. Every drop in mV helps the temps when you are pushing a lot of cores.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

Played around with the voltages the past day and a half. Trouble is, when I manually set voltages in the BIOS, it locks the clockspeed in place. So either I set the speed to something high (say 4050) and then the CPU constantly runs at that speed, or I leave it at base speed (3800) but then no boost.

So I went back to leaving voltages on Auto and instead set the CPU Core Voltage to an offset of -0.1V. That results in still having the boost, yet lower temperatures all around. Core Voltage runs at 1.264V, VID at 1.300-1.325V

???
My bios is set to "multiplier" -> auto and my cpu voltage is fixed. And my cpu idles at some low cpu mhz when it is not loaded and runs all the way up to non-turbo top speed under load. I have the turbo and other OC stuff (memory is still XMP) turned off to save some power.

Tom

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A proud member of the OFA (Old Farts Association).

One BIOS isn't the same as any other BIOS. Depends on the motherboard manufacturer. Also I am not sure what you're trying to say.

I think your 1.264V is pretty good for a 3900X. Remember you have one good die and one so-so die which is going to need more volts than the good binned die. Unless you go into your BIOS (and the BIOS actually offers the option) of setting independent CCD voltages, the option of just running Auto with a small negative offset covers both bases for each CCD. You may not be able to go any lower for the good die because then it will be to low for the bad die.

If it is stable and the temps are reasonable, then just run it.

I ended up at almost exactly the same Vcore for my 3900X.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

As you know I have been on a quest for a robust, high end Am4 socket MB that might run more than 6 gpus.

I already have an Asus ROG Crosshair VII Hero motherboard that will run 6 gpus (using at least 4 riser cards).

I finally broke down, googled the chipset for the Crosshair (turns out to be the X470) and googled "best Amd X470" motherboards.

I got a search hit from an "inhouse" NewEgg expert.

And that list included an MSI motherboard with 6 slots and presumably "Above 4G" support. It even has 3 full length slots.
MSI X470 GAMING PLUS AM4 AMD X470 SATA 6Gbs USB3.1 HDMI ATX AMD Motherboard
https://www.newegg.com/p/2MG-000M-001H8

So after I get rid all my Intel mining motherboards/cpus and excess gpu hardware I am probably going to try out this motherboard.

Since I have a brand new "spare" Amd 2700 cpu I can test to see if there is support for more than 6 gpus.

The dream, of course, is to mate my Amd 3950x with 10 or 12 or 16 gpus :)

If it is stable at 9 or 10 gpus that will exceed my previous best for the Am4 socket and could very well temp me into swapping in the AMD 3950x for the Amd 2700.

Tom

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A proud member of the OFA (Old Farts Association).

That mobo doesn't appear on MSI list of mobos compatible with Above 4G decoding. But the list has not been updated since 2017. None of the X470 boards appear since they came after.
https://www.MSI.com/faq/motherboard-2726
You would need to download the manual and check to be sure.

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Seti@Home classic workunits:20,676 CPU time:74,226 hours

A proud member of the OFA (Old Farts Association)

Apparently Digital times are reporting Ryzen 4000 for the desktop is set to be released in September (requires a subscription so i can't actually check).

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Grant
Darwin NT

That mobo doesn't appear on MSI list of mobos compatible with Above 4G decoding. But the list has not been updated since 2017. None of the X470 boards appear since they came after.
https://www.MSI.com/faq/motherboard-2726
You would need to download the manual and check to be sure.

Amazing. The manual actually addresses the question of "Above 4G" in the bios settings. So many of the manuals I have are just bit "skimpy" on details like that.
https://download.msi.com/archive/mnu_exe/mb/E7B79v2.1-GSE-LITE.pdf

The main Anandtech review doesn't like the way the VRM were labelled and is quite specific that this is not the "top of the line" for VRM stuff so once again I may be running into the not quite enough stable power to make the thing work. Sorta like the Biostar that could boot to 9 gpus, run 9 gpus, but not 24/7.

It still might be a good choice. Or I can take a more expensive MSI X470 with fewer Pcie slots.

Oh, well. This will not be a quick changeover. I need to sell some hardware before I buy another MB (or throw up my hands and just grow out to 6 gpus(Rtx 2060 Super and 5 p100-102's) and be done with it).

Its not like I can even dream about challenging for the one of the top 5 spots on the Leader board at S@H any more.

Tom

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A proud member of the OFA (Old Farts Association).

Most of my computers have exhausted any SETI WU's and have been switched to Rosetta as suggested by Tom. I started this thread 'Ryzen and Threadripper' in January 2019 and have found it very useful. Can it continue here or does it have to move/rename/ restart elsewhere?
jsm

Most of my computers have exhausted any SETI WU's and have been switched to Rosetta as suggested by Tom.

You'll need to limit the number of cores/threads you use to do Rosetta work as you don't have enough RAM to make use of them all (although the present ones are only using 250-750MB per Task, you need allow for up to 1.3GB of RAM and 1GB of HDD space per task to avoid out of memory issues).

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Grant
Darwin NT

Most of my computers have exhausted any SETI WU's and have been switched to Rosetta as suggested by Tom. I started this thread 'Ryzen and Threadripper' in January 2019 and have found it very useful. Can it continue here or does it have to move/rename/ restart elsewhere?
jsm

All announcements by Seti@Home indicate the website/forums/messageboards etc will continue to be made available and run.

So I would neither move the message area nor change the name (unless you want to ad say AMD gpu discussion to the mix).

I am perfectly happy with this thread exactly where it is, what it is called, and the topics it is covering.

Tom M

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A proud member of the OFA (Old Farts Association).

To add to Tom's comment - because each project is independent of others it is all but impossible to move a tread from one project to another.

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Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

To add to Tom's comment - because each project is independent of others it is all but impossible to move a tread from one project to another.

+1

I know that similarly named threads (Seti Orphans etc) have shown up on other projects but I wasn't thinking clearly about "move" which implies the content going to the new location. Sorry.

Tom M

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A proud member of the OFA (Old Farts Association).

To add to Tom's comment - because each project is independent of others it is all but impossible to move a tread from one project to another.

Hmmm, download on floppy, move to BOINC server, download from floppy. Same BOINC server software, so why shouldn't that work? ;-)

Because the user IDs will be different on the new server, and it'll come up as a conversation between a completely unrelated set of people!

Yes I assumed that would be the case with the 2990wx but it is cheerfully running 60 threads at present so I can see how it responds. As you say the occasional thread runs out of memory but picks up later. Does the calculation program run to completion or for a set time period? Also the log shows that Rosetta often does not accept download requests with the response ' system running 97% of the time and would not finish in the time available' [I paraphrase]. I am also having some problem with the team I joined - Isle of Man (Onchan). I do not live in Onchan and would rather that was dropped but whatever I cannot reconcile my membership with the output from Free-DC.
jsm