Ryzen and Threadripper

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Message 2052066 - Posted: 16 Jun 2020, 21:28:30 UTC - in response to Message 2052049.  

[Try plugging that into the Calculator for the 3000Mhz setting.


Thank you Keith. I completely missed the single rank/dual thing.

Tom M

It is much harder to drive dual rank sticks. More voltage and more resistance is needed to maintain signal integrity.
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Message 2052067 - Posted: 16 Jun 2020, 21:30:21 UTC - in response to Message 2052048.  


Good point. And I do wonder if there will be additional downward price pressure on the 3900x after the 3900xt is shipped?

In the short term, simply reducing the # of cpu threads running tasks will free up enough cpu threads to drive a 3rd Radeon 5700.

Tom M

Rumours are that the XT models are going to demand a slight price bump valuation. I too would suspect some pricing pressures on the original models.
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Message 2052175 - Posted: 17 Jun 2020, 23:11:23 UTC

I am looking for an Am4 motherboard to replace my damaged Asus ROG Crosshair VII. I promise to buy a new board and full price. I just fought and got mixed results with my first attempt at a replacement (used but alleged to be in good working order :( It may be that a new copy of this same model would be fine, except it has no diagnostic lights.

I have discovered to my horror that there are X470 motherboards out there without even led diagnostic lights much less the Q-Led(sp) of the Crosshair VII. Given that I am not apparently in need of Gen4 are there any "compromises" between the very reliable/robust Crosshair VII and something less pricey but just as reliable/robust with at least LED diagnostic lights?

The other thing that would be nice to have are 3 full length slots. Even nicer would be that rarity of the 3rd full length slot being 2.5 slots from the 2nd (like the first slot to the third slot). So far they mostly seem to be 2 slots which leaves you in a crowded position for the 2nd and 3rd gpus.

Thank you.

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Message 2052182 - Posted: 18 Jun 2020, 4:37:48 UTC

What happened to your C7H?
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Message 2052183 - Posted: 18 Jun 2020, 4:54:46 UTC
Last modified: 18 Jun 2020, 5:01:50 UTC

Today was surgery day on the Threadripper. I got all my parts together, the new D5 pump/reservoir, the new block insert and studs and the new flowmeter.
I really didn't want to remove the block since I was getting really good temps. But the promise of a few degrees more was enticing.

I lost the really great temp agreement between the two dies. Probably due the change in mounting pressure on the new studs. But also had to use my standard Arctic MX-4 paste and lose the really great Kingpin KPx paste that shipped with the original block. That stuff is much better than MX-4.

Now have a 2-3° C. differential between the two dies. Don't know if it because of the different mounting or a poor paste spread with the MX-4. Still sticking around 60° C. or so though. But haven't seen the 1-4° C. improvement from the new insert.

Based on reading block reviews, just the difference in mounting can cause a degree or more difference. That is why a good review does at least 5 mountings on each block to get an average.

Could be what I am seeing. I can't find the KPx paste anywhere though unless I order from Europe. I think I want to try some of the other pastes with >8 mK/W. thermal conductivity.

Could not gain any further improvements in clocks. Spent way too long trying to reach further but finally fell back on what was working stably before. The idea was if I got better temps with the new block insert I could maybe gain another 50-100Mhz on the core clocks. I would have had to push a lot more voltage and that would result in more temps that I didn't get the thermal headroom I was hoping for.

So back to status quo. At least changing to a different paste would be and easy half hour job in the future since it won't require any new plumbing, just remove the block, clean the old paste, reapply the new paste and tighten the block down again. Then test.

[Edit] Just found Kpx on Amazon. Ordered.
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Message 2052195 - Posted: 18 Jun 2020, 10:39:39 UTC - in response to Message 2052182.  
Last modified: 18 Jun 2020, 10:41:16 UTC

What happened to your C7H?


I allowed too much floor time (dust) in a mining chassis and am down to 2 long Pcie slots that still work. If I use a 1 to 8 or even a 1 to 4 expander on the 2nd slot it will work with 3 gpus (R5700's) which is what I have now.

The MB I have now has no diagnostic lights or a Q-Led. And apparently has 1 of 3 bad long slots. But had 3 long slots. I was going to populate two of them with gpus directly on the MB and use a riser on the 3rd slot.

I do have a model X570 with diagnostic lights but only 2 long slots that I could buy another of.

So I am pondering returning to the C7H or going with a "cleaner" model with at least the diagnostic lights.

The problems I am having with the C7H are all operator error related not quality/reliability of the design. All the C7H new replacements I have seen are north of $300 :(

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Message 2052215 - Posted: 18 Jun 2020, 15:08:17 UTC - in response to Message 2052195.  


The problems I am having with the C7H are all operator error related not quality/reliability of the design. All the C7H new replacements I have seen are north of $300 :(

Tom M


After I wrote this post it dawned on me that paying a local computer shop that I like a "cleaning" fee successful or not, would be an excellent investment. So I have sent them a service request.

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Message 2052259 - Posted: 18 Jun 2020, 21:45:58 UTC

Deep sink, Simple Green and a brush would accomplish the same thing. Or put it into the dishwasher. The overclockers do that all the time to get rid of the slathered on Vaseline. Then bake it in the oven at 140° F. for 4 hrs.
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Message 2052287 - Posted: 19 Jun 2020, 6:59:22 UTC

Just be careful with the dishwasher - you don't want to upset the domestic manager if one is caught using it to clean your dirty computer bits.....
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Message 2052468 - Posted: 21 Jun 2020, 14:50:41 UTC - in response to Message 2052287.  

Just be careful with the dishwasher - you don't want to upset the domestic manager if one is caught using it to clean your dirty computer bits.....


Don't own a dishwasher, would have to borrow another bachelors..... :)

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Message 2052469 - Posted: 21 Jun 2020, 14:53:40 UTC - in response to Message 2052215.  


The problems I am having with the C7H are all operator error related not quality/reliability of the design. All the C7H new replacements I have seen are north of $300 :(

Tom M


After I wrote this post it dawned on me that paying a local computer shop that I like a "cleaning" fee successful or not, would be an excellent investment. So I have sent them a service request.

Tom M


No reply. Maybe it is beneath their notice. Or maybe they are too busy....

May have gotten the "replacement" MB back upto 3 R5700's. Put the 3rd online this morning.

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Message 2054001 - Posted: 24 Jul 2020, 21:47:40 UTC

For a mega-benchmarking fest, see:


AMD Ryzen 5 3600XT / Ryzen 7 3800XT / Ryzen 9 3900XT Linux Performance In 130+ Benchmarks
wrote:
... these new higher-clocked Zen 2 desktop processors are shipping today. Here are 130+ benchmarks on each of the Ryzen 5 3600XT, Ryzen 7 3800XT, and Ryzen 9 3900XT parts compared to various Intel and AMD CPUs. Tests under Ubuntu Linux and also complemented by performance-per-Watt / power and performance-per-dollar data points...



And for a pleasant surprise: The 3950x is perf-per-watt champion!


Happy cool fast crunchin'!
Martin
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Message 2054018 - Posted: 25 Jul 2020, 2:45:48 UTC
Last modified: 25 Jul 2020, 2:47:45 UTC

I'm surprised the 3950X beats out the new XT models. I would have thought the improved processing in manufacturing would have netted a drop in voltage. But it seems to have been used instead to bump the frequency.

I found a significant drop in Vcore for the same clock speed in my 3950X compared to my 3900X. The 3950X has two better matched and better binned dies compared to the one "good" die and one "mediocre" die used in the 3900X. The mediocre die in the 3900X will always be the limiter for clock speeds, voltages and power consumed.

I love my 3950X. Running 30 of 32 threads on 6 projects simultaneously at fixed all-core clock of 4250Mhz at 1.24V and only 72° C.
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Message 2054025 - Posted: 25 Jul 2020, 5:17:48 UTC
Last modified: 25 Jul 2020, 5:18:53 UTC

I'm holding out for the Ryzen 4000 series.
There are plenty of rumours around saying how much of an improvement they are over the present series, but AMD are keeping quiet. So it's looking promising that those rumours are likely to be true.

As much as i'd like a Threadripper $2,400 (up to $6,600) is just way to rich for a CPU for me.
I'll probably go for a Ryzen 9 4900X (or whatever they call it). Still a stupid price, but at least it'll be less than $1,000 just for the CPU. But i'm expecting insane levels of output from software that can use all of those cores.
Grant
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Message 2054058 - Posted: 25 Jul 2020, 17:45:16 UTC - in response to Message 2054025.  

Yes, I am curious what kinds of improvements the 4000 series brings. Heard rumors of even better memory support compared to Ryzen 3000 cpus. I really want to replace my 2920X Threadripper with the newer TR3000 series but the big jump in price is discouraging me. Would need a new motherboard too. But the difference in math performance is dramatic between Zen 2 and Zen+.

For example on my best paying cpu project Universe, the 3950X has an APR over 9 and the TR2920X can only manage an APR of 3.3. Yet both hosts run approximately the same speed and with the same amount of RAM.

If there wasn't the issue of no X470/X570 supporting 4 gpus natively, I would just get another 3950X. But I can only do 4 gpus natively on the TR platform.
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Message 2054086 - Posted: 26 Jul 2020, 1:14:36 UTC

I will get my "giant server case" back next week. I am considering migrating my current mining rack back into it for better dust control.

I have my R6700's running on a mining rig so its not a problem to run 3 GPUs off it. 1 on the MB and 2 off a riser.

Has anyone seen an Am4 socket MB where all three of the long slots are 2.5 slots apart?

It is really common to have the 2nd and 3rd long slots only two slots apart making for a hot running gpu problem.

I may have found an X550 MB with all three long slots with 2.5 slot spacing. I am wondering if there are any others besides the "Godlike" model.
I really don't want to spend $1,000 on an MB.

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Message 2054097 - Posted: 26 Jul 2020, 4:15:01 UTC - in response to Message 2054058.  


If there wasn't the issue of no X470/X570 supporting 4 gpus natively, I would just get another 3950X. But I can only do 4 gpus natively on the TR platform.


Is this another way of saying 4 GPUs on the MB? There is at least Am4 MB that appears to support 4 GPUs directly on the MB. And "appears" to have 2.5 slot spacing in between every one of the PCIe X 16 slots.

It is a $700 MB called "Godlike".....

It may be the only way to get out of a mining rack and back into a regular E-ATX computer case.

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Message 2054152 - Posted: 26 Jul 2020, 15:43:45 UTC - in response to Message 2054097.  

I too lament the lack of modestly priced 4 gpu card capable X470/X570 motherboards. It is getting rare even in X399 boards too. I like the capabilities of the Godlike board but don't like the price. Why won't some board maker offer that model without all the bling which would shave a fair bit of $$$ off the product.
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Message 2054444 - Posted: 1 Aug 2020, 1:25:19 UTC - in response to Message 2054152.  

I too lament the lack of modestly priced 4 gpu card capable X470/X570 motherboards. It is getting rare even in X399 boards too. I like the capabilities of the Godlike board but don't like the price. Why won't some board maker offer that model without all the bling which would shave a fair bit of $$$ off the product.


I have moved my 3950x back into a giant server case I just got back from a customer (moved the guts from the server case to a smaller case).

So when the next X450 MB with 3 long slots comes in I will "try" running 3 R5700's in a case. I think I am going to end up with a short R5600xt as the third gpu as a compromise to improve the access to air by the middle gpu.

I guess there isn't a really high demand for a 4 long slot Am4 MB. Just have to move back up to a TRer to get that kind of spacing. :(

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Message 2054474 - Posted: 1 Aug 2020, 8:25:02 UTC

Still sitting on the fence on whether to pull the trigger on the TR system upgrade. I want the better math performance of Zen 2 in the TR platform.

Or do I continue to await the market releases of the Zen 3 systems to see what they will offer.
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Message boards : Number crunching : Ryzen and Threadripper


 
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