Seti at home takes a lot of power


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Message boards : Number crunching : Seti at home takes a lot of power

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Profile Mr. KevvyProject donor
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Message 1292838 - Posted: 8 Oct 2012, 17:13:13 UTC
Last modified: 8 Oct 2012, 17:13:33 UTC

Another reason I'm glad I rent instead of own: included unmetered electricity (and hot/cold water.)
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Message 1292953 - Posted: 8 Oct 2012, 21:25:30 UTC - in response to Message 1292788.

Are you sure $2,50 /kwh? this is even 6x more expensive than here, i spend more than US$ 650 per month just to keep my hosts working at (US$ 0.40/kwhr). So i imagine at 2,50... :(

Good pickup (i was looking at power used, not per unit price)- it's $0.198/kWh.
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Message 1293010 - Posted: 9 Oct 2012, 0:51:30 UTC

I've done something quite similar with my single cruncher. It's an IBM Intellistation Z-Pro 9228 with two each quad-core Xeon X5356 processors and an overclocked MSI Radeon R6870 Twin Frozr graphics card, all water-cooled with a Koolance Exos v2.0 external system. Running SETI on all 8 cores and the Radeon throws a goodly amount of heat into the office/spare bedroom.

I don't know how much time you let your machine crunch but I've come up with a rough way of rating computers that crunch by multiplying the Floating Point Speed by the Integer Speed / 10,000. I suppose I need to weight it with % of crunch time. Below are mine at 80% with your's at the bottom. But you certainly have a good build there. Surprise. the Dual Core 215 x2 beats the FX4100, but to be fair the FX4100 hasn't been using the GPU - No ATI tasks are getting downloaded. (And the CoreI5 Mac beats out the I7920). I do not claim that this is accurate, just a way I was looking at them.
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Computer Rank FP Speed-Int Speed
Athlon 64 3800+ 744 1833 4060
Amd Fx4100 897 1536 5838
Athlon 215 x2 1,513 2183 6931
I7 920 2,103 2540 8278
Mac Core I5 2,957 3315 8920
I7 3820 4,450 3519 12647
Your Xeon Machi 2,516 2838 8865

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Message 1293011 - Posted: 9 Oct 2012, 0:57:37 UTC

That didn't copy very well. Guess I need to learn how to paste an image on here.


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Message 1293026 - Posted: 9 Oct 2012, 1:41:20 UTC - in response to Message 1292418.
Last modified: 9 Oct 2012, 1:42:32 UTC

... I don't think anyone can say that SETI has searched the sky with no results. ...

Indeed...

We may not have yet found any evidence of "Aliens" or ET, however, various other things have been found along the way...

Perhaps most importantly is that this "ad-hoc" brand of public participation distributed computing has taken off BIG TIME to help various significant projects.

Back at s@h, the Arecibo data that has been collected for s@h has been used to map the galactic hydrogen to build a 3d map of our Milky Way galaxy.

We're also searching for new and/or unusual pulsars that may be hidden in the data. (There's a parallel connected but different project for that also over at Einstein@home.)

And... You never know what 'artificial' or non-natural strangeness we may yet find in the data that could well spawn new science.


Meanwhile, note that all this was supposed to piggyback on just IDLE computer time to take advantage of otherwise wasted resource... My own view is that if you have recent hardware, you may as well make 100% use of it. Old clunkers may still be useful but only if they are doing more than just burning waste heat (no need to give the fossil fuel criminals an easy lunch at our expense).

Happy crunchin',
Martin
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Message 1293086 - Posted: 9 Oct 2012, 5:15:00 UTC

The 3 AMD boxes arent producing very much. Turn them off and sell them!
You could, with the proceeds, replace your GTX 260 with a GTX 680.

Lean and mean:
Intel i7 3820 + (2) GTX 550ti
Intel i7 920 + (1) GTX 680
Intel i5 2500 + (1) Radeon 6770

This would cut nearly half your power bill AND be contributing more work.

If your i7 920 has room on the motherboard, you could also sell your i5 machine and buy another GTX 680.

Even leaner and meaner:
Intel i7 3820 + (2) GTX 680
Intel i7 920 + (2) GTX 550ti


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Message 1293099 - Posted: 9 Oct 2012, 6:24:49 UTC - in response to Message 1292397.
Last modified: 9 Oct 2012, 6:27:07 UTC

I guess my questions would be:

1) Is there some cost of power that's acceptable and how much would that be, roughly? $10/month? $25/month?

2) Is there some amount of work you would feel good about contributing to SETI (a number, not something vague like "as much as I can"). 10,000 "RAC" or 20,000? More? Less?

3) Do you have any budget to spend on hardware to get the most out of whatever you feel okay spending on your power budget?

The best news is this: No matter what you decide, your contribution is important to the goal. When I started doing this, I ran the screen saver and turned the computer off at the end of the work day, turning it back on the next day. By doing that on several computers at once I was able to generate more than one day's worth of work every day.

Recent Average Credit and "total credits" are worthless. All that counts is that someone's computer, somewhere, part-time, full-time, big crunching hog or part-time crunching genius, finds something.

As you already know, several of your machines aren't very efficient by today's standards, but if it's what you have, then it is what you have. I'm an AMD CPU fan, myself, but they make lousy crunchers (in general and on a per-watt basis specifically). If you are worried about power efficiency, shut them down.

Let's say your real RAC is 30,000, all machines running.

You could get that out of a single $400 GTX 670. (about 170w under "bitmining" conditions according to TomsHardware)

The cost of running it (reference card with optimized apps = very roughly 30,000/day RAC) would be something like...

170w * 24h = 4080w /day
4080 / 1,000 = 4.08KwH / day
4.08 x $0.12/KwH = $0.49/day
$0.49/day x 365 = $178.85
$178.85 / 12 = $14.91 / month

Since the card's not the only thing in a computer, you can probably double that.

Then you could turn the others off, save $50+/month on power, and increase your "RAC" to 30,000 (or so) at the same time.

Just a thought and "in the ballpark" numbers.

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Message 1293313 - Posted: 10 Oct 2012, 0:20:07 UTC

There were several good posts there relating to getting the right hardware to crunch effectively. I can do some of that. Three of the AMD boxes would make could internet only machines for relatives that will never do more than Yahoo and Gmail. I could then take the funds and upgrade GPUs to crunch sans the CPUs and (Turn Off the Monitors!)Sounds like a good project. Also some answers to tbret.
1) Is there some cost of power that's acceptable and how much would that be, roughly? $10/month? $25/month? - I was thinking more like 15 a month. at nearly 100 a month (1200 year) that seemed a little steep.

2) Is there some amount of work you would feel good about contributing to SETI (a number, not something vague like "as much as I can"). 10,000 "RAC" or 20,000? More? Less? - I think I got a little caught up with wanting to deliver the most numbers I could with the equipment I had. Bottom line - better GPUs make better more efficient crunchers.

3) Do you have any budget to spend on hardware to get the most out of whatever you feel okay spending on your power budget? - Over time I can spend more on hardware and feel good about it. I guess I just like to utilize those old AMDs where it makes sense...like the x2 215 with 8 gb DDR2 ram, it works good for a server and the old AMD 3800+ on it's last legs is one to get rid of but it's still works for internet.

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Message 1293471 - Posted: 10 Oct 2012, 14:52:22 UTC

I hope that on the machines you are shutting down, you are letting them finish the work they already have on board.
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Message 1293525 - Posted: 10 Oct 2012, 17:22:33 UTC

At one time I had 3 machines crunching. An Intel dual core Imac, an old P4, and my Intel I7 running hyperthreading and a litle Nvidia GTS 250. And my rac on a good seti run was 14,000.
I never thought my electric use was high untill I use my central air in the summer.

I never found out what the rac will be for my I7, Seti keeps going down every time I go over 10,000 rac . Im thinking maybe 12,000 or a tad more.

You have to decide what is right for you. We dont know your finances.
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Message 1293662 - Posted: 11 Oct 2012, 0:29:50 UTC - in response to Message 1293471.

Yes, they are finishing

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Message 1294093 - Posted: 12 Oct 2012, 8:41:34 UTC - in response to Message 1292645.

I'd hate to see what the power bills are for some of our more massive crunchers. 500K RAC doesn't come cheap.

So you will feel our pain by just imagine our power bill here to mantain 300K RAC as the kw/hr here cost almost 2x or more the US price... Oh no my headache returns...:)


Heart attack!

This made me have a look at global electricity pricing... and I think Boinc needs to start roaming charges! Denmark, Brazil and Hawai'i should get double-credit. Backdated too!

@Denmark: You know those wind-turbines you guys have outside Copenhagen, on the way to Malmö? I think you might need more of those:)

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Message 1294119 - Posted: 12 Oct 2012, 10:09:06 UTC - in response to Message 1294093.

I'd hate to see what the power bills are for some of our more massive crunchers. 500K RAC doesn't come cheap.

So you will feel our pain by just imagine our power bill here to mantain 300K RAC as the kw/hr here cost almost 2x or more the US price... Oh no my headache returns...:)


Heart attack!

This made me have a look at global electricity pricing... and I think Boinc needs to start roaming charges! Denmark, Brazil and Hawai'i should get double-credit. Backdated too!

@Denmark: You know those wind-turbines you guys have outside Copenhagen, on the way to Malmö? I think you might need more of those:)


I'd planned one in my 'back garden' but my neighbours and city counsil aren't
thrilled about this idea ;-)
Electricity doesn't come cheap in western Europe.



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Message 1294122 - Posted: 12 Oct 2012, 10:18:26 UTC

Oh my I wondered why Australia's electricity's is so expensive at $0.456 p/kw. But then I am using 3 laptops for BOINC and don't have any desktops. :)

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Message 1294398 - Posted: 12 Oct 2012, 19:27:50 UTC - in response to Message 1294122.

Oh my I wondered why Australia's electricity's is so expensive at $0.456 p/kw. But then I am using 3 laptops for BOINC and don't have any desktops. :)


The price is almost the same here and i have 7 desktops with GPUs... :(

But teoricaly we could produce almost 100% of the electricity from hidroelectric plans, so makes no sense the high price we pay here.
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Message 1294400 - Posted: 12 Oct 2012, 19:35:09 UTC - in response to Message 1294398.

Oh my I wondered why Australia's electricity's is so expensive at $0.456 p/kw. But then I am using 3 laptops for BOINC and don't have any desktops. :)


The price is almost the same here and i have 7 desktops with GPUs... :(

But teoricaly we could produce almost 100% of the electricity from hidroelectric plans, so makes no sense the high price we pay here.

Sometimes the high cost has to do with getting the power where it needs to go instead of the cost of producing the power. If the cost was $1.00/kw it might be $0.05 for generation & $0.95 for transmission to your location.
The laws in my state require the company show you the two costs separate. Out of the $0.18/kw I pay it is about $0.10/kw for generation & $0.08 for transmission.
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