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Posts by melk

1) Message boards : Number crunching : Nvidia tasks not equal to AMD performance... (Message 67761)
Posted 1 Sep 2018 by melk
Post:
Maybe I did not choose the best words. I am not blaming anything, just trying to understand the large discrepancy in credit.

It would appear it boils down to the coding efficiency of the task applications themselves. Fair enough.
2) Message boards : Number crunching : Nvidia tasks not equal to AMD performance... (Message 67744)
Posted 29 Aug 2018 by melk
Post:
It appears that the OpenCL Nvidia tasks are not as efficient as the OpenCL for AMD?

I have a Titan Black card, which on paper has very strong FP64 performance, around ~1500 GFLOPS which is better than AMD 280X which are around ~1000 GFLOPS.

My various 280X cards return anywhere between 360,000 - 460,000 credit each.

The Titan Black is currently earning about 167,0000 credit. Disappointing :(

The card is at steady 99% utilization, running 4 WU at once. There are no Error or Invalid tasks.

I have to assume this is just due to the efficiency of the tasks and how they are coded? Or maybe something else? Any ideas? Thanks!
3) Message boards : Number crunching : On a single host always Validation Error (Message 67683)
Posted 23 Jul 2018 by melk
Post:
Are you willing to upgrade to Windows 10? You can use your existing windows license key and create a USB installer using the Microsoft Media Creation Tool

https://www.microsoft.com/en-us/software-download/windows10

You may need to pull one GPU from the system and see which one is causing the errors. What motherboard are you using?
4) Message boards : Number crunching : Frequency preference (Message 67682)
Posted 23 Jul 2018 by melk
Post:
Yeah I have wondered about this one as well.

Seems like it deals with how often the tasks tries to complete once the calculation is complete? It's really not clear at all. :(
5) Message boards : Number crunching : GTX 1080 Ti vs RX 480 (Message 67633)
Posted 27 Jun 2018 by melk
Post:
It has not yet reached it's final max plateau for RAC either, even after roughly 1 month since I set it up running 24/7 it is still gaining RAC: 759,643 today up ~3,000 from yesterday! I need to get another one of these cards :D
6) Message boards : Number crunching : GTX 1080 Ti vs RX 480 (Message 67629)
Posted 26 Jun 2018 by melk
Post:
I know that the AMD FirePro S9150 gives 2.5 TFlop in Double Precision operations (with just 235 W TDP). Can it be the best solution for M@H?


This page says no:
http://milkyway.cs.rpi.edu/milkyway/gpu_list.php


What are you looking at it? It's the top listed #1 card, lol.

My S9150 is currently putting out approx 756,749 RAC
7) Message boards : Number crunching : GTX 1080 Ti vs RX 480 (Message 67618)
Posted 22 Jun 2018 by melk
Post:
Very useless, better send it to me! :D

Asteroids and GPUgrid also do well with Nvidia cards (single precision aka FP32)
8) Message boards : Number crunching : GTX 1080 Ti vs RX 480 (Message 67614)
Posted 21 Jun 2018 by melk
Post:
RX 480 = roughly 365 GFLOPS FP64

1080 Ti = roughly 368 GFLOPS FP64

Seems about right.
9) Message boards : Number crunching : Excessive disk usage (Message 67604)
Posted 18 Jun 2018 by melk
Post:
Likely a one time issue. Was it downloading WU? Which version of Windows?
10) Message boards : Number crunching : AMD GPU: Computation Error (Message 67580)
Posted 6 Jun 2018 by melk
Post:
Hello
I have an Amd Radeon 380X graphic card and I have lot's of computation errors almost 50%
Once again It seams that this projects has unsolved computation issues on amd/ati graphic cards.

The team of this...so called "project" is probably not up to the task for fixing their own issues with graphic card computation. It is happenning very often, I mean very very often!

So it's a shit project for me !
I won't waste computation time and electricity on Milkyway anymore despite my respectable score and history.

If, like me you have lot's of computation errors with this...?project?
Crunch on Einstein at home wich is issue and error free !

Sincerly
Elvis


Elvis, that's too bad you are having computation errors on your cards.

What have you tried to fix that?

Not sure insulting the devs is really going to do much other than make you look foolish.

"It is happenning very often, I mean very very often!" Hrmmm, couldn't be your particular hardware/software eh?

I currently have 3 invalid tasks across 6 cards and hundreds of tasks completed. What does that show? That the devs are responsible for terrible coding, causing all your troubles? Or maybe, just maybe, you need to take a swing at tweaking your particular set of OS/drivers/boinc config etc?

I'm happy to help you troubleshoot. Personally I found lowering my CPU setting and leaving some room for OS tasks helped a lot. What particular cards/os/drivers etc are you running? Latest version of boinc app updated? Any tweaks to the boinc .xml files? Running multiple WU per card?
11) Message boards : Number crunching : AMD FirePro S9150 (Message 67554)
Posted 30 May 2018 by melk
Post:
Nice investigative work Beemer. I will need to look into this more and likely attempt the same patch you have just discovered.
12) Message boards : Number crunching : WUs sticking on AMD RX 560 GPU (Message 67479)
Posted 17 May 2018 by melk
Post:
That is very weird.... not sure what to say. CPU differences between the two machines maybe?
13) Message boards : Number crunching : WUs sticking on AMD RX 560 GPU (Message 67477)
Posted 17 May 2018 by melk
Post:
Running 1 WU at a time, or multiple?

Pause only at the end? or random/in the middle?

New problem or it's always been that way?

Which OS? Driver version?
14) Message boards : Number crunching : Which GPU? (Message 67475)
Posted 17 May 2018 by melk
Post:
Want to mention that the S9000 is listed at "<225" at WiKi, and I suspect it is no more than 200 and may be closer to 150 than 225.


I suspect that could very well be. Wiki isn't necessarily 100% accurate itself anyhow. Really just a rough estimate at best.
15) Message boards : Number crunching : Which GPU? (Message 67469)
Posted 17 May 2018 by melk
Post:
https://docs.google.com/spreadsheets/d/1ImSDoLeuZFvmO6xoMpy2VMs9Du_6sHT5GqcORMtx2tQ

That link should work for my Spreadsheet. Still a work in progress and there's some missing data and some extra fluff like the "fake rank" column where I decided to try and assign a very-rough estimate of overall general performance based on Cores*Clockspeed.

The main focus is showing 3 main variables (GFLOPS, Price, Watts) and how they interact.

Unfortunately due to locking/merging certain cells I cannot dynamically sort the columns how I would like. Still determining if there is a way I can do that.
16) Message boards : News : New Separation Runs 7 May (Message 67467)
Posted 16 May 2018 by melk
Post:
cpu only.... wow...
17) Message boards : Number crunching : Which GPU? (Message 67466)
Posted 16 May 2018 by melk
Post:
Ahh, well Milkyway is the only project I crunch so I bought the cards specifically for it. 580 should be good for games then. :)
18) Message boards : Number crunching : Which GPU? (Message 67464)
Posted 16 May 2018 by melk
Post:
I bought my S9150 for $340 USD on ebay. Currently see other S9100 cards for $300-400 USD.

W9100 card (basically the same card, with built-in cooling fan) is $800-1000 or more. Crazy. lol.

So if you can rig up the cooling, the price/performance just blows everything else out of the water. Otherwise, 280X all the way.
19) Message boards : Number crunching : Which GPU? (Message 67463)
Posted 16 May 2018 by melk
Post:
Rough numbers, FP64 performance. will vary with clockspeeds etc

290: 606 gflops
560: 163 gflops
580: 385 gflops

280x: 1024 gflops
6990: 1276 gflops
7990: 1894 gflops

S9150: 2530 gflops

Keep in mind this is only half the story. Other important question is the energy (watts) required for this performance. My spreadsheet goes into all of this and makes calculations based on TDP of gflops-per-watt and other considerations (including purchase price, for $cost-per-gflops)
20) Message boards : Number crunching : Which GPU? (Message 67461)
Posted 16 May 2018 by melk
Post:
Hi, I have an entire spreadsheet with info. I can't link it at work, google docs is blocked :( I'll reply tonight from home.

It depends on how hands-on you like to be, if you have no problem rigging up your own cooling solution, the FirePro (S91xx) server cards are fantastic for FP64 and a *very* good value for cost/performance ratio. The server cards are passive, heat-sink only, you need to figure out a way to actively cool them. I use 40mm fans, but these are VERY LOUD.

There are Workstation versions (W9100 etc) of the card that have built in fans like a normal GPU, but they tend to be more expensive. Still offer the best raw performance however.

Just as a point of reference, depending on the exact model, the S9100 and S9150 offer somewhere in the neighborhood of ~2500 GFLOPS of FP64 performance.

Stepping down to the consumer Radeon cards, you're best bet is still the 280X. Depending on the exact model, clockspeeds etc, they offer, roughly, around 1000 GFLOPS.

Similar cards, (AMD does a lot of re-branding, with the same/slightly tweaked hardware) such as the preceding 7970 offer roughly the same performance. 7950 slightly below that etc.

Keep in mind the xx90 (6690, 7790) cards are dual-GPU on single card, and offer slightly better performance-per-watts than running two separate cards. I can't recall the exact GFLOPS for these off the top of my head (though easy enough to look up on wiki). I personally run a 6990 and am pretty happy with the performance, but that was before I discovered the S9150.

The 290 is 'ok' but not great with FP64, less performance than 280x. All the newer 3xx/4xx/5xx series simply do not offer strong FP64. Better single precision yes (that's all games need) but even Vega is not particularly strong in double precision.

By far the best bang for the buck is the FirePro server cards if you can deal with the cooling and resulting noise. or the regular 280X for an easy drop-in solution.

Have fun! :D


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