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Old 2011-09-19, 06:24   #1
Rodrigo
 
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Wink Budget PC Throughput

Please check out this link http://www.computerpoweruser.com/Dig...s/Default.aspx and go to page 71.

Two Xeons (twelve cores) and four GeForce GTX 580's. Hmmm. Not that I'm about to buy one of these, but -- how many GHz-days/day would this baby yield? Let's say we put the Xeons to LL and the 580's to TF. (Or whatever other combination of work would provide the greatest output.)

Just curious... unless I win the lottery!

Rodrigo
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Old 2011-09-19, 13:02   #2
Christenson
 
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Gotta rate TF versus LL to get that answer....4x GTX580 will put you in Xyzzy's class...3 of those have him turning in perhaps 25,000GHz-days of TF per month, so #4 gets you to 32,000GHz-days per month. That means about 4% of the GHz-days awarded each monht. But this eats 4 of your 12 cores, leaving the other 8 to do LL. Alternatively, you could use cudaLUCAS to have those 4 GTX's do LL tests.

But it'll kick some LL tests!!!!
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Old 2011-09-19, 14:52   #3
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Quote:
…4x GTX580 will put you in Xyzzy's class…
Our hardware is much less exciting than that.

We have 2 GTX570 GPUs in separate boxes. We average around 1 GHz/day every 2½ minutes. The memory bus on each box is (we think) saturated because any additional work we try to do slows Mfaktc down. We are currently GPU limited so we use only 3 of the 4 cores available. Four cores gets us slightly more throughput but temperatures go up a lot. (Many thanks to Oliver for helping us figure out the 3 versus 4 core deal!)
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Old 2011-09-19, 16:52   #4
Rodrigo
 
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Quote:
Originally Posted by Christenson View Post
Gotta rate TF versus LL to get that answer....4x GTX580 will put you in Xyzzy's class...3 of those have him turning in perhaps 25,000GHz-days of TF per month, so #4 gets you to 32,000GHz-days per month. That means about 4% of the GHz-days awarded each monht. But this eats 4 of your 12 cores, leaving the other 8 to do LL. Alternatively, you could use cudaLUCAS to have those 4 GTX's do LL tests.

But it'll kick some LL tests!!!!
32,000GHz-days per month! Three of these boxes and you could challenge curtisc.

Thanks for working out the numbers. Something to work and save our pennies for...

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Old 2011-09-19, 22:37   #5
Christenson
 
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Quote:
Originally Posted by Xyzzy View Post
Our hardware is much less exciting than that.

We have 2 GTX570 GPUs in separate boxes. We average around 1 GHz/day every 2½ minutes. The memory bus on each box is (we think) saturated because any additional work we try to do slows Mfaktc down. We are currently GPU limited so we use only 3 of the 4 cores available. Four cores gets us slightly more throughput but temperatures go up a lot. (Many thanks to Oliver for helping us figure out the 3 versus 4 core deal!)
I thought you said you had 3 machines, one GPU each...sounds indeed like to further optimise your stuff we need to do something that doesn't stretch the memory bus so....or have mfaktc sieve on the GPU instead of in memory...

I've been using the spare capacity on my GTX480 to run cudaLucas....not as impressive but reasonably productive....
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Old 2011-09-20, 01:07   #6
Xyzzy
 
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Quote:
I thought you said you had 3 machines…
Our third box is our "work" box. It has a GTX 430 but we only use it for video output. The GTX 430 (eVGA) was one of the cheapest video cards we could find that has 2 DVI outputs.

The "work" box does P-1 work and is almost silent. The other 2 boxes are very loud and obnoxious so they have a dedicated room.
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Old 2011-09-21, 06:31   #7
Dubslow
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Ummm.... Who's we?
Could someone (preferably Xyzzy) fill me in on Xyzzy?
Thanks
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Old 2011-09-21, 11:53   #8
fivemack
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Xyzzy is xyzzy. This is his forum. As monarch of all he surveys, he uses the monarchical first-person plural.
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Old 2011-09-22, 00:13   #9
Christenson
 
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I thought Xyzzy included fish1, the gophers, and a few other helpers.....
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Old 2011-09-22, 00:52   #10
Dubslow
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Still lost. Who are the others?
Also, Xyzzy built these forums?

Last fiddled with by Dubslow on 2011-09-22 at 00:53
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Old 2011-09-22, 01:34   #11
Xyzzy
 
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We take care of the internal workings of the forum, with the help of various resident forum assistants.

The forum is administered by the super moderators and (on a per forum basis) regular moderators.

Content is provided by the forum users.

In our view, the forum users have built this forum into a repository of awesome information.

Without content this forum would be as useless as an inflatable dart board.
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