GTX 580 running at 85-95% for the duration of crunching


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Questions and Answers : GPU applications : GTX 580 running at 85-95% for the duration of crunching

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Leonidas Achaios
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Message 1333492 - Posted: 1 Feb 2013, 10:35:59 UTC

I tried crunching with my GTX 580 yesterday, and I really didn't like how the card was perma working near 100% while crunching. I thought that at this rate I was going to run the card into the ground pretty fast, so I switched off GPU crunching.

Is there any way you folks know where one is able to make the card operate/crunch while working at less than 50% usage?

This is my only rig, so I really don't have the luxury to blow it up. GTX 580 is also an expensive card (I own Gigabyte GTX 580 Super Overclock Windforce 3X).

What do you guys recommend?

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Message 1335023 - Posted: 6 Feb 2013, 1:11:40 UTC - in response to Message 1333492.


Use TThrottle:
http://www.efmer.eu/boinc/

It will not allow to set exact GPU load% - it works on temperature.
You "Select a temperature, check "Auto active" and TThrottle handles the rest."
('the rest' means: TThrottle pauses the apps (computing threads) in short intervals and keeps the temperature at the max you selected/typed
If the temperature is below the max you selected - the device (CPU/GPU) will run at 100%
If it gets 'hot' - pauses in app will occur (which will be visible by less CPU/GPU load) to keep the temperature at the max selected (e.g. 55°C for CPU and 65°C for GPU)
)


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Leonidas Achaios
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Message 1335737 - Posted: 8 Feb 2013, 9:24:41 UTC

Thanks. I had a look at the software you recommended.

BTW, I am really impressed at the rate which my GTX 580 is completing SETI tasks compared to my Core 2 Extreme QX 9650 running @ stock.

Both GPU and CPU are running at stock.

GPU processes an ASTRO PULSE task in about 30-35 minutes. My CPU needed for the same task 23 hours.

GPU processes normal SETI tasks in about 1.5 to 6 minutes. My CPU needed for the same tasks between 6 and 7 hours.

In fact, the difference in processing time between CPU & GPU in SETI tasks is so unbelievably huge, that I stopped my CPU from processing SETI tasks altogether and assigned it to do some humanitarian work from World Grid. World Grid tasks seem to run faster on my CPU.
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Message 1335995 - Posted: 9 Feb 2013, 2:03:59 UTC - in response to Message 1335737.


Those are the miracles of parallel computing.

Today's GPUs are (almost) as fast as supercomputer of only decade ago:
- your GPU NVIDIA GeForce GTX 580 have 1581.1 GFLOPs "theoretical shader performance in single-precision floating point operations":
http://en.wikipedia.org/wiki/GeForce_500_Series#Products

1500 GFLOPs = 1.5 TFLOPs (TeraFLOPs)
http://en.wikipedia.org/wiki/Tera-

And "As of November 2004, the Cray X1 had a maximum measured performance of 5.9 teraflops"
http://en.wikipedia.org/wiki/Cray#Cray_Inc.:_2000_to_present

"The Cray X1 is ... sold by Cray Inc. since 2003 ... offering a peak speed of 12.8 gigaflops per processor."
"The largest unclassified X1 system was the 512 processor system at Oak Ridge National Laboratory"
http://en.wikipedia.org/wiki/Cray_X1

512 * 12.8 = 6553.6 gigaflops = 6.55 teraflops (theoretical)

And the systems from 'Top hosts' can compute faster (if programed in CUDA and algorithm/code is highly parallel)
http://setiathome.berkeley.edu/top_hosts.php

"Coprocessors [8] NVIDIA GeForce GTX 690" (= 4 video cards):
http://setiathome.berkeley.edu/show_host_detail.php?hostid=5948046


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Leonidas Achaios
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Message 1336170 - Posted: 9 Feb 2013, 12:39:47 UTC
Last modified: 9 Feb 2013, 12:40:33 UTC

To expand on what you said, I made a few calcs:

I had originally joined SETI@Home on 25 Oct 2005. From that date since I stopped participating on 28 Aug 2006, my Pentium 4 Dual Core@3.20 GHz had crunched 3720 units.

I returned on 1st Feb 2013, and since then my GTX 580 GPU alone, working from morning til evening (not 24/7) has crunced about 30000 units in less than 8 days. :-)
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Questions and Answers : GPU applications : GTX 580 running at 85-95% for the duration of crunching

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