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Thread: Crunching power per watt? |
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Thread Status: Active Total posts in this thread: 11
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges: 
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I am curious about what kind of hardware would be most efficient in terms of crunching power per watt of electricity consumed.
----------------------------------------I came across the following interesting article: http://www.scientificcomputing.com/news-HPC-N...gy-Processors-032910.aspx What are your thoughts?  |
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pirogue
Veteran Cruncher USA Joined: Dec 8, 2008 Post Count: 685 Status: Offline Project Badges: 
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I don't know THE answer, but you can use the following URLs to get a good idea.
----------------------------------------http://en.wikipedia.org/wiki/List_of_CPU_power_dissipation http://www.xtremesystems.org/forums/showthread.php?t=251213 (2nd post) |
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges:
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The article as such simply says that efficiency has been increased three fold. Fine but what does that really mean.
----------------------------------------In general low power processors for laptops and mobile device like phones etc.. are low voltage and low frequency devices. This means that you have to compensate the low crunching power by adding devices. Adding devices increase the power consumed. There must be an optimal tradoff somewhere. To make a test, you would compare an Atom unit with say a 980X unit. Use for both systems the same SSD disk to make it comparable. Motherboard and the rest will be different anyway. Graphics should be kept to the minimum. Passive board or on board graphics. Then you must run exactly the same test program. You plug a power measurement device at the wall socket of each machine and then you can get to a watt/computation figure for each machine. But this is not the whole story!! We are crunchers and we want to crunch as much as possible. So we have to define how much power we are ready to pay for. Let's say that we agree to consume 1kW. Then we have to see for that kW how much computation we get from a system made by Atoms or 980Xs. Even if the watt/computation ratio of the Atom is very low it maybe that at 1kW consumed power we do not get as much computations as with the 980X. I would be very interested in such a test. Maybe Movieman could help us.   [Edit 1 times, last edit by Hypernova at Sep 1, 2010 4:08:27 PM] |
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David Autumns
Ace Cruncher UK Joined: Nov 16, 2004 Post Count: 11062 Status: Offline Project Badges:
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Hiya kateiacy
----------------------------------------This thread maybe of interest to you https://secure.worldcommunitygrid.org/forums/wcg/viewthread_thread,29297 I laid down the gauntlet in the MIPS per watt at the socket challenge I'm still saving for one of these http://www.cpu-world.com/CPUs/K10/AMD-Phenom%...GR%20(HDT55TWFGRBOX).html I should have one soon but in the meantime I have yet to have a challenger have a go at beating the value in my sig I might just have the leanest greenest number crunching machine I used to sign off with keep the cpu's glowing and the fans a blowing but things have moved on since 2004 efficiency is the name of the game Take care and happy crunching Dave  |
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nasher
Veteran Cruncher USA Joined: Dec 2, 2005 Post Count: 1422 Status: Offline Project Badges: 
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personally i buy a computer for my home use... what part of it i am not using gets donated to WCG or other DC projects. i dont care as much for how much per watt i can get but is is useful to me
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
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Hiya kateiacy This thread maybe of interest to you https://secure.worldcommunitygrid.org/forums/wcg/viewthread_thread,29297 I laid down the gauntlet in the MIPS per watt at the socket challenge Dave Thanks for the link to your challenge thread! Fascinating indeed, and awesome numbers you have there. |
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David Autumns
Ace Cruncher UK Joined: Nov 16, 2004 Post Count: 11062 Status: Offline Project Badges:
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Cheers kateiacy
---------------------------------------- Currently it's getting 10770 WCG points per day for 99W/h at the socket 4533 WCG Points per KWh. 106.5 FP MIPS per watt at the socket is the best benchmark though Hopefully a lot more soon Dave [Edit 1 times, last edit by David Autumns at Sep 2, 2010 12:15:43 PM] |
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges:
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I get on my faster machines about 50'000 WCG ppd for 250 Watts.
----------------------------------------That is 6 KWh per day. It boils down to 8333 points/KWhr. Not bad at all |
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Movieman
Veteran Cruncher Joined: Sep 9, 2006 Post Count: 1042 Status: Offline |
The best I've seen was on my SM X8DA3 w/2-X5670 westmere's(3192mhz on turbo)
----------------------------------------app 82,000 WCG PPD with a measured( Kill-a-Watt) 330w draw.. It's probably even better than that as there's an old Leadtek 7800GTX vid card in there that isn't exactly what you'dcall a "green"card..   [Edit 1 times, last edit by Movieman at Sep 5, 2010 7:54:01 AM] |
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David Autumns
Ace Cruncher UK Joined: Nov 16, 2004 Post Count: 11062 Status: Offline Project Badges:
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Movieman Hypernova
----------------------------------------How many Floating Point MIPS/W at the socket does that make? Let us know what it takes to get more than 106.5 (without CUDA support) Fingers crossed I should get my 95W TDP Hexacore this week Dave |
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