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drummers-lowrise
1) Message boards : Number crunching : Too much work when joining (Message 149851)
Posted 6 days ago by Profile NickProject donor
(someone can teach me the precise details)

I am also worried about saying things well and precisely. If JeppeSN has this concern, I think PG message is too worried about details. But yes, we should attempt to be factually correct. I also think there should be an attempt to think best of what people write - so we don't have to be so concerned for absolute correctness. I wonder at the meaning of The Devil In The Details....
2) Message boards : Number crunching : Should DC tasks be counted into the number of tasks a user has run on the home page? (Message 149847)
Posted 6 days ago by Profile NickProject donor
Should DC tasks be counted into the number of tasks a user has run on the home page?
I mean, I technically ran 1/2 actual tasks of the number of SoB tasks thats shown on my home page. (meaning half of sob tasks recorded were DC)
Could this be changed to only reflect Primary tasks?

Do you mean the tasks returned in the last 24 hours?
As far as I know, for LLR2, it doesn't include DC.
3) Message boards : Number crunching : Sier"pi"nski's Birthday Challenge (Message 149775)
Posted 10 days ago by Profile NickProject donor
How do you cool the 9960X and what temps do you get?

On the new 9960X, it is running at 50 degrees C - it hasn't gone above 55 when the weather is hot.
This is with a Corsair iCUE H150i RGB PRO XT - 3 fans water cooled.

The older 9960X now has some issues and is running in the high 60s - even though not too long ago it was running nearly as cool as the new one.
The issues are that it turns out I have a Corsair iCUE H100i RGB PRO XT - 2 fans - even though I paid for the larger model. Another issue is the MB is a bit screwy and the mosfets are overheating. And a fan on the GPU is knackered. (I'm waiting for the right moment to make a warranty claim for the GPU and then address why I have the wrong cooling)

So right now, running 4 x SR5 on each 9960X and running only 2 x SR5 on the 9980XE because if I run more it goes into the high 70s for 3 tasks and into the 80s for 4 tasks. It usually doesn't run this hot, but it will be warmer than the old 9960X (which usually sits in the low 60s). Note it isn't the number of cores running SR5 - it is the number of tasks.
4) Message boards : Number crunching : Sier"pi"nski's Birthday Challenge (Message 149767)
Posted 10 days ago by Profile NickProject donor

Hi Nick,

Yes it was you I was referring to! :D
Your PC's with AVX-512 are really great for PG. I assume that's why you bought them? They are WAY faster than my 3950X


Guilty! I bought my 2nd computer - a 9960X - entirely for primegrid.
Initially I wasn't able to use AVX512 and comparing computer throughput, it ran not much better than the 8 core 9900K.
I remember that to get best throughput, it was better to use around 8 to 10 cores.
That all changed when AVX512 was introduced into LLR.

I initially chose the 9960X because I was considering a 9920X - I thought maybe the 9940X, but settled on the 9960X because of the extra cache.
But it left me wondering if I should have gone all out and got the 9980XE. So I got one.
It underperformed the 9960X, core for core by 15% and was hotter.

Then I got really silly and bought another 9960X confirming that it is (was) a better choice.
I say was because there are 2 or 3 projects that now test it's ability to run 2 tasks in cache at once, whereas the 9980XE should have an advantage with those 2 or 3 projects over the 9960X.
If I was to buy another intel, I would buy another 9960X (or newer AVX512 16 core if it exists). I am not going to buy any more hardware - I have already gone too far.
My 4th computer is ready to go for a real graphics card, but I am not going to go there.
5) Message boards : Number crunching : Sier"pi"nski's Birthday Challenge (Message 149766)
Posted 10 days ago by Profile NickProject donor
Not as quick as a 5950x though:-)

The 5950x is faster with SOB (~7%) than a 9960X and most likely faster again with PSP.
Running 2 x CUL or 2 x WOO in cache is borderline with a 9960X - so I'd say the 9960X would be slower with those.
I don't know if GCW has become too large to run 2 x tasks in cache on a 9960X.
We'll have to see about smaller FFT projects.... :)
6) Message boards : Number crunching : Sier"pi"nski's Birthday Challenge (Message 149667)
Posted 16 days ago by Profile NickProject donor
Interesting!
Thanks for sharing Scott.

I really noticed during the challenge just how much quicker an Intel PC with AVX-512 was compared to say a Ryzen 3950X.

A 9960X (16 cores) did SoB w/u's in around... 30-33K sec per w/u vs a 3950X (16 cores) which was around 70 - 80K per w/u.

I think I'm the only person with 9960Xs.
What is interesting is that some tasks ran much slower.
All slow tasks had FFT of 3000K (except for one task with FFT of 3200K)
All tasks with an FFT of 3360K were fast (33K sec)
A fast task with FFT of 3000K was 29K sec.

Even my 9980XE was nearly as fast as a 9960X for fast tasks and it has shown that it can nearly keep up - so now I know that it slacks off. Up until running this challenge, in nearly every project, the 9960Xs were faster than the 9980XE by about 10-15% and run about 10 degrees C cooler. Go figure?

I know an AMD 5950X that was doing 2 x 8 thread tasks in 54K sec which was with FFT of 3000K
And 65K sec for FFT of 3456K - these are faster than my 9960Xs by about 7% for the FFT of 3000K

I learnt on the last day that I could download many tasks and quickly work out which ones were going to run as well as possible - aborting the rest.
7) Message boards : Number crunching : Tour de Primes 2021 (Message 149075)
Posted 41 days ago by Profile NickProject donor
I am unable to look this up.
Is PPSE LLR2?


The big table on the front page tells you which apps have fast double checking (which today means LLR2). PPSE and (also SGS) is *not* LLR2. All the other LLR projects use LLR2.

8) Message boards : Number crunching : Tour de Primes 2021 (Message 149074)
Posted 41 days ago by Profile NickProject donor
I am unable to look this up.
Is PPSE LLR2?


The big table on the front page tells you which apps have fast double checking (which today means LLR2). PPSE and (also SGS) is *not* LLR2. All the other LLR projects use LLR2.
9) Message boards : Number crunching : Tour de Primes 2021 (Message 149071)
Posted 41 days ago by Profile NickProject donor
I am unable to look this up.
Is PPSE LLR2?
10) Message boards : Aggie The Pew message board (Message 148185)
Posted 67 days ago by Profile NickProject donor
I got a prime - PPSE - it wasn't found by the AtP internal challenge computer, which is flat knackers at just under 3000 x PPSE tasks per day


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