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Message 19490 - Posted: 18 May 2014, 2:35:31 UTC

Which GPU video cards produce the most points per day. Nvidia or AMD(ATI)?
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Message 19492 - Posted: 18 May 2014, 11:09:18 UTC - in response to Message 19490.

Please see WUprop
http://wuprop.boinc-af.org/results/projet.py?projet=Collatz+Conjecture&application=Large+Collatz+Conjecture

AMD seems generally to be the better choice.

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Message 19493 - Posted: 18 May 2014, 22:21:24 UTC

Which GPU video cards produce the most points per day. Nvidia or AMD(ATI)?


At Collatz, based on broadly equivalent cards, definitely AMD.

However, interesting developments afoot (take a look at the science thread), whether anything permanent comes of it, and how it pans out for AMD or NVidia remains to be seen.

http://boinc.thesonntags.com/collatz/forum_thread.php?id=1157&postid=19475#19475

But .... if you are contemplating a purchase and are swayed by Collatz performance, it may be wise to hold fire for a few weeks, to see if anything comes of the accelerated Apps in the thread referenced above. If the idea in that thread works .... performance could well take off exponentially.

Much water yet to flow under the bridge, way way too early to be even sure it will work long term, let alone predict what the AMD or NVidia performance will be .... but the idea looks promising. Far, Far to early to say whether AMD or NVidia will come out on top of that revised app ... time will tell once they have had a chance to work through it ... early days at present......

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Message 19498 - Posted: 19 May 2014, 11:13:58 UTC - in response to Message 19490.

Which GPU video cards produce the most points per day. Nvidia or AMD(ATI)?


Here? Or at other projects? Because the answer may not be the same, some projects can ONLY use Nvidia cards but I don't remember one that can ONLY use AMD cards. ALTHOUGH projects like this one, as of today, prefer the AMD cards. It all depends on who the project admin gets to do the programming for the gpu's, if the person is better versed in the way AMD or Nvidia gpu's work. The guy here is much better at AMD stuff, but has made a good working app for the Nvidia cards too. Each project gets their own programmers and therefore each project is different in which gpu type they prefer, and how they use it to crunch their own units.

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Message 19504 - Posted: 19 May 2014, 23:38:08 UTC - in response to Message 19493.

Which GPU video cards produce the most points per day. Nvidia or AMD(ATI)?


At Collatz, based on broadly equivalent cards, definitely AMD.

However, interesting developments afoot (take a look at the science thread), whether anything permanent comes of it, and how it pans out for AMD or NVidia remains to be seen.

http://boinc.thesonntags.com/collatz/forum_thread.php?id=1157&postid=19475#19475


The OpenCL kernel remains basically the same though.

As Mikey said, what works best here doesn't necessarily work best everywhere. AMD has lots of small, simple stream processors. nVidia has fewer but more complex cuda cores. nVidia works best with very complicated functions whereas AMD tends to work better with simpler functions. Since 3x+1/2 is about as simple as it gets, AMD tends to work better on Collatz but the differences between AMD and nVidia also changes slightly as each focuses on gaming or floating point (and collatz only uses integers) so as each new family of GPUs come out, the numbers change.

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Message 19586 - Posted: 31 May 2014, 22:00:02 UTC

An issue you may wish to consider is the OS. I don't have any experience with Windows or Linux, so I will leave it to others to compare the impact of those OSs on Collatz performance. However, a number of Mac users have had trouble running Collatz on AMD 5870 and 7950 GPUs under OS X 10.9 (but not under 10.8). Parenthetically, I have never gotten Collatz to work on an AMD 5770 GPU in a Mac Pro 1,1 under OS X 10.7. That's probably not a fault of Collatz, as that GPU is not an officially sanctioned upgrade for the Mac Pro 1,1 - the PCI 1.1 slots don't have the bandwidth of the PCI 2.0 slots in my Mac Pro 3,1s.

I have not heard of anyone running Collatz on a Mac Pro equipped with an EVGA GTX 680 Mac Edition or an NVIDIA Quadro 4000. I would love to hear thoughts on those platforms - I am considering an upgrade to my main office Mac.

Finally, I have two Mac Pro 3,1s, each equipped with an AMD Radeon HD 5870 under OS X 10.8.5. Each generates approximately 230K Collatz credits/day.

Good luck assembling your Collatz cruncher!

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Message 19592 - Posted: 2 Jun 2014, 7:55:33 UTC - in response to Message 19493.

But .... if you are contemplating a purchase and are swayed by Collatz performance, it may be wise to hold fire for a few weeks, to see if anything comes of the accelerated Apps in the thread referenced above. If the idea in that thread works .... performance could well take off exponentially.


The speed-up by the 'sieve' and NV vs. AMD are actually two different topics but located in the same thread. (I should have opened a new thread about hardware-specific optimizations.)
The sieve will accelerate collatz Apps running on all hardwares alike because it's on the algorithm level. The apps just gain an ability to look ahead ~29 steps and predict which numbers will rise (check them) or fall (don't have to check them). If we look ahead 29 steps, only 1/84 of all numbers are required to check, so it's theoretically 84x faster than original collatz App, which checks all numbers. It's actually only ~20x faster because of some overhead upon loading the sieve.
As to NV vs. AMD, because they handle caching and memory reads differently, the size of look-up table in collatz app which is good for AMD cards is bad for NV cards. e.g. Shrinking the size of look-up table to 1/16 makes AMD app twice faster(fits in the L2 cache) but makes NV app many times slower (threads competing access to the look-up table).
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Message 20356 - Posted: 3 Apr 2015, 22:44:48 UTC

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx

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Message 20357 - Posted: 4 Apr 2015, 10:30:45 UTC - in response to Message 20356.

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx


My AMD 7970 is getting about 300k per day of RAC while running the mini units like this:
200.68 50.33 788.69 Mini Collatz Conjecture v6.04 (opencl_amd_gpu)

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Message 20359 - Posted: 7 Apr 2015, 18:22:54 UTC - in response to Message 20357.
Last modified: 7 Apr 2015, 18:23:39 UTC

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx


My AMD 7970 is getting about 300k per day of RAC while running the mini units like this:
200.68 50.33 788.69 Mini Collatz Conjecture v6.04 (opencl_amd_gpu)



You are wasting time and leaving tons of points on the table by crunching Mini WU's. You'd do much better crunching Large WU's. My 7970's average about 1 million PPD each when I dedicate them to Large WU's.
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Message 20360 - Posted: 8 Apr 2015, 10:43:40 UTC - in response to Message 20359.

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx


My AMD 7970 is getting about 300k per day of RAC while running the mini units like this:
200.68 50.33 788.69 Mini Collatz Conjecture v6.04 (opencl_amd_gpu)



You are wasting time and leaving tons of points on the table by crunching Mini WU's. You'd do much better crunching Large WU's. My 7970's average about 1 million PPD each when I dedicate them to Large WU's.


Thanks, those are taking almost 7 hours per unit on your gpu's, mine are taking in the 3 to 4 minute range for each unit, I kind of like the little ones but it seems I may be paying for it. I will check it out.

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Message 20361 - Posted: 8 Apr 2015, 21:31:53 UTC - in response to Message 20360.

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx


My AMD 7970 is getting about 300k per day of RAC while running the mini units like this:
200.68 50.33 788.69 Mini Collatz Conjecture v6.04 (opencl_amd_gpu)



You are wasting time and leaving tons of points on the table by crunching Mini WU's. You'd do much better crunching Large WU's. My 7970's average about 1 million PPD each when I dedicate them to Large WU's.


Thanks, those are taking almost 7 hours per unit on your gpu's, mine are taking in the 3 to 4 minute range for each unit, I kind of like the little ones but it seems I may be paying for it. I will check it out.


Actually, most Large WU's take about 5.5 hours on my 7970's. Sometimes longer(still can't figure out why), but mostly in the 5.5 to 6 hour range.

Are you using an optimized config file? Your performance on that 7970 seems slow. For example, my HD7870 completes Mini WU's in 3 minutes almost exactly. I would expect a 7970 to do it closer to 2 minutes. If yours are taking 3 to 4 minutes, I suspect you aren't using an optimized config file.
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Message 20362 - Posted: 9 Apr 2015, 10:31:28 UTC - in response to Message 20361.

So can anybody update this issue ?

What are the best choices to maximise WU per day ?

TIA

dunx


My AMD 7970 is getting about 300k per day of RAC while running the mini units like this:
200.68 50.33 788.69 Mini Collatz Conjecture v6.04 (opencl_amd_gpu)



You are wasting time and leaving tons of points on the table by crunching Mini WU's. You'd do much better crunching Large WU's. My 7970's average about 1 million PPD each when I dedicate them to Large WU's.


Thanks, those are taking almost 7 hours per unit on your gpu's, mine are taking in the 3 to 4 minute range for each unit, I kind of like the little ones but it seems I may be paying for it. I will check it out.


Actually, most Large WU's take about 5.5 hours on my 7970's. Sometimes longer(still can't figure out why), but mostly in the 5.5 to 6 hour range.

Are you using an optimized config file? Your performance on that 7970 seems slow. For example, my HD7870 completes Mini WU's in 3 minutes almost exactly. I would expect a 7970 to do it closer to 2 minutes. If yours are taking 3 to 4 minutes, I suspect you aren't using an optimized config file.


No I am not, I'm just crunching here because I can't crunch elsewhere right now, personal reasons nothing to do with projects or whatever.

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Message 20363 - Posted: 9 Apr 2015, 19:49:40 UTC - in response to Message 20362.

1) Go here:

C:\ProgramData\BOINC\projects\boinc.thesonntags.com_collatz


2) Right-click-->Edit on the file in that directory named:

mini_collatz_6.04_windows_intelx86__opencl_amd_gpu.config

3) Paste the following text exactly as shown into that file, then Save and close the file:

verbose=1
items_per_kernel=22
kernels_per_reduction=9
threads=8
sleep=1

4) Exit and restart BOINC and enjoy much faster crunching times!
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Message 20364 - Posted: 10 Apr 2015, 12:07:41 UTC - in response to Message 20363.
Last modified: 10 Apr 2015, 12:13:52 UTC

1) Go here:

C:\ProgramData\BOINC\projects\boinc.thesonntags.com_collatz


2) Right-click-->Edit on the file in that directory named:

mini_collatz_6.04_windows_intelx86__opencl_amd_gpu.config

3) Paste the following text exactly as shown into that file, then Save and close the file:

verbose=1
items_per_kernel=22
kernels_per_reduction=9
threads=8
sleep=1

4) Exit and restart BOINC and enjoy much faster crunching times!


Thank you, I have done it and will watch the progress!

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Message 20365 - Posted: 11 Apr 2015, 2:48:20 UTC - in response to Message 20364.

By the way, the reason I run Large WU's is because Collatz give a point bonus on all WU's that take longer than 1/2 hour to complete. On a 7970, the only WU's that should take longer than 1/2 hour are Large WU's. The Solo WU's take only about 20 minutes on a 7970.
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Message 20366 - Posted: 11 Apr 2015, 2:54:57 UTC - in response to Message 19490.
Last modified: 11 Apr 2015, 2:56:01 UTC

Which GPU video cards produce the most points per day. Nvidia or AMD(ATI)?


For the maximum performance at the best price, I believe the HD7970/280-X is the best choice at Collatz. They also kick ass at Moo!, PrimeGrid (Genefer), Poem, and Milkyway.

You really can't go wrong with a 7970/280-X on Boinc, except for those projects that are Nvidia-only (GPUGrid, BURP, and Asteroids), or perform far better on Nvidia (PrimeGrid-PPS Sieve, and SETI).
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Message 20367 - Posted: 11 Apr 2015, 12:16:00 UTC - in response to Message 20365.
Last modified: 11 Apr 2015, 12:16:38 UTC

By the way, the reason I run Large WU's is because Collatz give a point bonus on all WU's that take longer than 1/2 hour to complete. On a 7970, the only WU's that should take longer than 1/2 hour are Large WU's. The Solo WU's take only about 20 minutes on a 7970.


I dropped about 100 seconds off my times for each unit, they are now completing in half the time they were, due to your tweaks...THANK YOU VERY MUCH!!!

I will now have to rethink the mini units I am doing.

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Message 20371 - Posted: 12 Apr 2015, 12:26:06 UTC - in response to Message 20367.

By the way, the reason I run Large WU's is because Collatz give a point bonus on all WU's that take longer than 1/2 hour to complete. On a 7970, the only WU's that should take longer than 1/2 hour are Large WU's. The Solo WU's take only about 20 minutes on a 7970.


I dropped about 100 seconds off my times for each unit, they are now completing in half the time they were, due to your tweaks...THANK YOU VERY MUCH!!!

I will now have to rethink the mini units I am doing.


I know I am replying to myself, kinda sorta, but I've had to undo the tweak settings for now, the gpu was running too hot, ie 97C!! Right now it is back down to 67C and is back to the old times again. I use MSIafterburner to monitor the fans and it was running at 100% for extended times while crunching.

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Message 20373 - Posted: 12 Apr 2015, 21:00:14 UTC - in response to Message 20371.

By the way, the reason I run Large WU's is because Collatz give a point bonus on all WU's that take longer than 1/2 hour to complete. On a 7970, the only WU's that should take longer than 1/2 hour are Large WU's. The Solo WU's take only about 20 minutes on a 7970.


I dropped about 100 seconds off my times for each unit, they are now completing in half the time they were, due to your tweaks...THANK YOU VERY MUCH!!!

I will now have to rethink the mini units I am doing.


I know I am replying to myself, kinda sorta, but I've had to undo the tweak settings for now, the gpu was running too hot, ie 97C!! Right now it is back down to 67C and is back to the old times again. I use MSIafterburner to monitor the fans and it was running at 100% for extended times while crunching.



Yeah, that is one downside to optimizing the app, which increases the GPU usage.

Sounds like you could possibly use some more cooling in your case. Have you checked the fans and cooling on your GPU, to ensure it isn't covered in dust? How much airflow do you have in your case? Which 7970 do you have and what are the clocks?

Collatz will definitely heat up a GPU, especially when running optimized, but 97deg is still pretty high. Mine generally run right around 75deg max, but I have them in cases that have lots of airflow.
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