Ryzen and Threadripper

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Grant (SSSF)
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Message 2003682 - Posted: 22 Jul 2019, 1:14:08 UTC - in response to Message 2003596.  
Last modified: 22 Jul 2019, 1:15:48 UTC

Isn't 80° C too much for this chip? I don't like seeing my 1800x above 70° C... I know 7nm ryzens begin to throttle at around 90° C , but I don't know if it will shorten the life of the CPU if being continuously used around 80° C.

70°c is my preferred maximum for electronics over the long term.
Many power supply capacitors are rated at 105°c, most electrolytics are rated for 85°c, but running them at that temperature for extended periods will result in a very short life span. (And as bad as high temperatures are, frequent thermal cycling (min to max to min temperature etc) doesn't do them any favours either).

Similarly for power supplies- 75% of a power supply units rated capacity is the highest load i'd want on one for any period of time, if you want the PSU to last.
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Message 2003705 - Posted: 22 Jul 2019, 3:22:55 UTC - in response to Message 2003682.  

I'm not sure what a cpu temp has to do with motherboard capacitors. And most top tier motherboards don't use cheap electrolytics anymore. They use solid metal 12K hour caps rated at 105° C.

And from the various online website reviews of Zen 2 all have reported that the full load temp of the entire range ends up around 80° C. even at base clock.

I turned down the multiplier from 43 to 42.5 and dropped the temps 2° C. I could turn down the multiplier some more to drop temps even more if I want. I could also revert to the SSE41 app instead of the AVX app which would drop the temps even more.

Or I could and should find a bigger case so I could mount the 360mm X 40mm radiator I have with one of my old cpu blocks and convert to a custom cooling loop for the cpu. Which is what I am sure I will do eventually. I just need to find a suitable case that will fit on the desk and not overwhelm it.
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Message 2003706 - Posted: 22 Jul 2019, 3:34:20 UTC - in response to Message 2003705.  

I'm not sure what a cpu temp has to do with motherboard capacitors.

They both have maximum operational temperature ratings.
Electrolytic capacitors are much more affected by high temperatures than Silicon, but the fact is they both experience significantly reduced life expectancy when operated near their maximum rated limits for extended periods.
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Message 2003725 - Posted: 22 Jul 2019, 5:02:53 UTC - in response to Message 2003706.  
Last modified: 22 Jul 2019, 5:04:11 UTC

I'm not sure what a cpu temp has to do with motherboard capacitors.

They both have maximum operational temperature ratings.
Electrolytic capacitors are much more affected by high temperatures than Silicon, but the fact is they both experience significantly reduced life expectancy when operated near their maximum rated limits for extended periods.

Again . . . . what does a cpu running at 80° C. have to do with caps running at 50° C.?

Why do you assume that the caps would be running at the same temp as the internals of the cpu?
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Message 2003729 - Posted: 22 Jul 2019, 5:37:44 UTC - in response to Message 2003725.  
Last modified: 22 Jul 2019, 5:40:17 UTC

Why do you assume that the caps would be running at the same temp as the internals of the cpu?

I don't.
I was just using them as an example of why you want to run a CPU well below it's maximum rated temperature.


Again . . . . what does a cpu running at 80° C. have to do with caps running at 50° C.?

They might have different maximum temperature value, but if you run them near those maximums their lives will be significantly reduced. It's not the absolute temperature that is important (be it 20°, 50° or 130°).
It's how close it is being operated to it's maximum rated temperature.

eg- something rated for 20° being run at 18° will not last as long as something rated at 250° being run at 140°
The first is being run near it's limit, the second well below it's limit- even though the actual temperature for the second one is much higher, it will still last longer.
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Message 2003740 - Posted: 22 Jul 2019, 7:08:02 UTC

And finally just a FYI. This is from a Reddit post and explains why I could not find the max temps for the 3900X on AMD's product website.
https://www.reddit.com/r/hardware/comments/caczwa/amd_removes_maximum_temperature_from_their_ryzen/

Secondary FYI. I just ordered a new case to transplant the 3900X daily driver in my old Corsair Air 540 case into a new Thermaltake Level 20 XT. What I was suprised to find is that it appears the old Core X5 and Core X9 cases are no more and have been discontinued. I was going to order another X5 case but after several hours of searching could not find it anywhere. Not even on the TT website. Looks like this new Level 20 product takes the place of the Core series. I am not happy with the tempered glass panels but apparently that is the latest thing in everyone's case portfolio these days.

I am sure I will get better temps from the 360mm X 40mm radiator I am going to use with the Aqua Computer cpu block or the XSPC Raystorm Pro block. Haven't decided yet which. Just need to order another XSPC X4 Photon 170 pump/reservoir and some more fittings and some fans. I do have 3 Noctua NF-A12X15 fans on the shelf and I could use them. But the NF-A12X25 fans have 1mm H20 more static pressure and the radiator does use the 20fpi fin spacings which begs for high static pressure.
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Message 2003863 - Posted: 22 Jul 2019, 21:40:22 UTC

An interesting article from Techspot comparing the Ryzen 5 3600 & the 3600X.
Basically given the same cooler, they perform the same.
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Message 2003870 - Posted: 22 Jul 2019, 21:49:30 UTC - in response to Message 2003863.  

An interesting article from Techspot comparing the Ryzen 5 3600 & the 3600X.
Basically given the same cooler, they perform the same.

Interesting yes, but not surprising. This fact goes back to the same question in 2017 of which is better, the 1700 or the 1700X. Back then the opinion was the same, giving the 1700 the same good cooling solution, it clocked just as high as the 1700X for less cost. Seems the case remains the same till this day.
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Message 2003923 - Posted: 23 Jul 2019, 5:50:59 UTC

I've had two occasions so far where I found the computer turned off when I wasn't watching. I can't find any reasonable sign of errors of why it is doing it. A bit of a mystery now. So I am throwing things at it to see what might be causing or helping prevent the issue. I will be a lot happier when I can get an updated BIOS.
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Message 2003924 - Posted: 23 Jul 2019, 6:16:40 UTC - in response to Message 2003923.  

I've had two occasions so far where I found the computer turned off when I wasn't watching. I can't find any reasonable sign of errors of why it is doing it.

Got a spare PSU lying around?
Always useful to eliminate the PSU early on.
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Message 2003926 - Posted: 23 Jul 2019, 7:17:45 UTC - in response to Message 2003924.  

I've had two occasions so far where I found the computer turned off when I wasn't watching. I can't find any reasonable sign of errors of why it is doing it.

Got a spare PSU lying around?
Always useful to eliminate the PSU early on.

No I don't. Or not one big enough to handle the load. My perusal of the logs has some suspicious postings that I have seen duplicated to a large part on both occasions. But a cause or an effect is unclear. I turned off the extensions that were tied to the log entries and will wait and see. It has taken a day before the event happens. Might be tied to anacron job. But could be the cpu also since that is the latest big change in the system.
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Message 2004042 - Posted: 24 Jul 2019, 8:47:07 UTC - in response to Message 2003207.  

Get a Threadripper 2950X for $670 today at Amazon. https://www.amazon.com/AMD-Ryzen-Threadripper-Processor-YD295XA8AFWOF/dp/B07GFN6CVF
$230 off the regular price.

List Price: $899.00
Price: $639.27 + $5.89 shipping
You Save: $259.73 (29%)

Price seems to be dropping more and more. Now I am tempted...
Life's short; make fun of it.
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Message 2004047 - Posted: 24 Jul 2019, 9:30:13 UTC - in response to Message 2004042.  

Get a Threadripper 2950X for $670 today at Amazon. https://www.amazon.com/AMD-Ryzen-Threadripper-Processor-YD295XA8AFWOF/dp/B07GFN6CVF
$230 off the regular price.

List Price: $899.00
Price: $639.27 + $5.89 shipping
You Save: $259.73 (29%)

Price seems to be dropping more and more. Now I am tempted...

Make sure to compare it to a Ryzen 9 3950X first.
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Message 2004074 - Posted: 24 Jul 2019, 15:30:01 UTC - in response to Message 2004042.  

Get a Threadripper 2950X for $670 today at Amazon. https://www.amazon.com/AMD-Ryzen-Threadripper-Processor-YD295XA8AFWOF/dp/B07GFN6CVF
$230 off the regular price.

List Price: $899.00
Price: $639.27 + $5.89 shipping
You Save: $259.73 (29%)

Price seems to be dropping more and more. Now I am tempted...


Pro's.
Mature bios, tech, 4 channel memory, cpu
Because of the number of Pcie lanes you should be able to use a pcie extender card with riser cards to run a lot of gpus.

Cons
Must buy a good heavy duty VRM MB. 4 sticks of Samsung-B die ram, and a very good Liquid cpu cooler.

Note: You can get an AM4 MB running a 2600 cpu that will drive 9 gpus.

Tom
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Message 2004077 - Posted: 24 Jul 2019, 15:43:51 UTC - in response to Message 2004074.  

The 2950x was only $499.99 during newegg.com's July 16th sale. It sold out very fast!
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Message 2004091 - Posted: 24 Jul 2019, 17:54:02 UTC - in response to Message 2004047.  

Get a Threadripper 2950X for $670 today at Amazon. https://www.amazon.com/AMD-Ryzen-Threadripper-Processor-YD295XA8AFWOF/dp/B07GFN6CVF
$230 off the regular price.

List Price: $899.00
Price: $639.27 + $5.89 shipping
You Save: $259.73 (29%)

Price seems to be dropping more and more. Now I am tempted...

Make sure to compare it to a Ryzen 9 3950X first.

I'm sure the 3950X will womp the 2950X on cpu and memory clocks. But it won't match the 2950X on memory bandwidth. Four channel is always going to trump two channel.
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Message 2004118 - Posted: 24 Jul 2019, 21:07:53 UTC
Last modified: 24 Jul 2019, 21:08:49 UTC

Leaked result of the upcoming Castle Peak Threadripper 3000 parts.

https://www.tomshardware.com/news/amd-threadripper-3000-castle-peak-16-core-cpu,40011.html

Up to 13% faster overall in benchmark tests against an equivalent 16C/32T 2950X part.

https://cpu.userbenchmark.com/Compare/AMD-Ryzen-TR-2950X-vs-AMD-100-000000011-12/m569025vsm858271
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Message 2004323 - Posted: 26 Jul 2019, 5:32:00 UTC - in response to Message 2004118.  

I was just wondering how AMD would designate a TR 64/128 if the rumours of such a beast are correct? 3920, 3950 and 3990 with or without suffixes are no problem but 3999 or 4000?? A touch whimsical perhaps......
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Message 2004326 - Posted: 26 Jul 2019, 6:39:23 UTC - in response to Message 2004323.  

I was just wondering how AMD would designate a TR 64/128 if the rumours of such a beast are correct? 3920, 3950 and 3990 with or without suffixes are no problem but 3999 or 4000?? A touch whimsical perhaps......
JSM

If they go with the current naming conventions, I would expect to see a 3990WX with four CCD dies under the IHS of the Threadripper along with the I/O die for a 32C/64T part. For a 64C/128T part I would think they would have to reorient the locations of the I/O die to fit 8 CCD's. I expect that TR part to mimic the die layout of the Rome server part.
The I/O die is bigger on the Rome cpu compared to the Ryzen 3000 cpu because it has to handle 4 or 8 channels of memory compared to just two.

I heard rumors of a X599 chipset to go along with the new Threadripper 3000 parts.
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Message 2004564 - Posted: 28 Jul 2019, 0:07:43 UTC

Its interesting. Somehow I seem to be getting different behaviors on two different Amd cpus.

The 2600 balances things out with 0.50 cpu / gpu and keeps growing/going up. Yes it has 7 gpus and a different mb/bios.

When I try a similar trick on the 2700 it appears to "go flat" as far as growth is concerned. Yes it has 9 gpus and a different mb/bios.

Makes me wonder if the "trick" on the 2600 will "go away" once I install it on the same MB model as the 2700.

Tom
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Message boards : Number crunching : Ryzen and Threadripper


 
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