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Number crunching :
Why use CPU on SETi@home?
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HAL9000 Send message Joined: 11 Sep 99 Posts: 6534 Credit: 196,805,888 RAC: 57 |
I'm using two of my laptops at home for crunching. An old Pentium M. Which is overclocked from 1.5GHz to 2.4GHz & runs 100% 24/7. I have actually been trying to kill the things for the past 2 or 3 years, but it just keep going! For the Pentium M overclocking I did a jumper trick on the CPU to increase the FSB from 100MHZ to 133MHz. Then used a software tool that let me overclock the FSB further. I think I still have the links for that info somewhere at home, but I am current at work. Since I actually use the i3 laptop it works out better if I don't use the CPU for crunching. It has weird lag issues when the CPU is fully loaded. Which I don't see on any other system I use for crunching. Plus I prefer hardware cooling solutions. So if I wanted to run both I would likely just engineer something to help cooler it better. I do have a 50w peltier around somewhere from the days of overclocking old slot1 celerons. When I get a new laptop I'll retire the i3 to do nothing but run BOINC on the CPU. Running 4 CPU threads gets more work done in a day than the GPU alone. SETI@home classic workunits: 93,865 CPU time: 863,447 hours Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[ |
Akio Send message Joined: 18 May 11 Posts: 375 Credit: 32,129,242 RAC: 0 |
My 2 i5 rigs' CPU's make up around 20% of their total RAC alone without fuss so why not use them? I have to concur with my good buddy Wiggo on this one. Although my CPU may crunch slower than my 780 TI's, it still accounts for a good bit of the workload. But on a personal note, my Voyager rig was built for S@H specifically, so it would be silly not to put my i7 processor to use...otherwise it's just overkill for internet surfing and mIRC usage. (Yes, I still frequent good 'ol IRC, hehe) |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
Just looked at your machines you have 2 GPU's that are decent the others , Quadro's not that fast and your Raidon mm looks a bit old Well actually, Quadro2000 is faster than 730GT...both runing a single job, get them on 90% of GPU capacity! But can't mess with it cause in the office coputer, that is BitLocker locked... Radeon 34xx is too old! Few days ago a new intelHD & nVidia 820M was added... ;) TThottle is put only on laptops...belive me, it's better that than finding a machine reboted...or shut down 'cause of the heat! ;) my GPUs are running single job...gets these GPUs up to 90% of their compute capacity...so I don't bother to use whole 100%! if it was less than 80% I would think about it... but Quadro2000 has a cooler of their own...& 730GT is heatsink only...but never gets over 45-50C...both in desktops! ;) I'm using two of my laptops at home for crunching. An old Pentium M. Which is overclocked from 1.5GHz to 2.4GHz & runs 100% 24/7. I have actually been trying to kill the things for the past 2 or 3 years, but it just keep going! don't know if I havce a jumper for that on laptop? but will check! ;) please send to inbox any info you have! that would be noisy! :D maybe if you remove the keyboard & screen you can run it with big cooler & fans? put laptop on a docking station... ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Well actually, Quadro2000 is faster than 730GT...both runing a single job, get them on 90% of GPU capacity well nvida web site says the quadro has 192 cuda cores and if it's faster than the 730 then the 730 must be the crap version there are 3 versions , 1 with 96 cuda cores 1 with 384 and 64 bit and the good one has 384 cuda cores and ddr5 My 650's have ddr5 and 384 cuda cores my GPu's run at 99% with 3 units and only 45% with one unit so you wouldn't be able to do 2 units on the Quadro or the 730 without the time blowing out to much So some GPU's arn't as fast as CPU multi core chips unless your going to by a good card and why there is no reason to get rid of the CPU type units . My AMD FX will do more than both those GPU cards i reackon . |
spitfire_mk_2 Send message Joined: 14 Apr 00 Posts: 563 Credit: 27,306,885 RAC: 0 |
Given that "most" (if not almost all) projects on BOINC use CPU for their calculations...the question comes to my mind why use it on SETi@home also? When S@H came out, there was NO GPU CRUNCHING. |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
@spitfire_mk2 When SETi@home came out, you didn't have multi-core machines...nor a 3D graphics CUDA or OpenCL to do calculations...just a beginning of OpenGL! also, you didn't have DSL...or optics...or Solar sails... and we didn't land on the asteroid...nor did we have NEO-WISE... we also didn't know that stars move closer & away from our Sun...we never seen Magnetar...nor did we see a Black hole horizon...nor did we search for Pulsar on SETi@home... your meaning is what? that SETi@home shouldn't evolve? Well actually, Quadro2000 is faster than 730GT...both runing a single job, get them on 90% of GPU capacity it's this one: http://www.techpowerup.com/gpudb/b2007/asus-gt-630-silent-2-gb.html only rebranded to 730 GT... did you check that out? does it really outperform the GPUs? non-profit org. Play4Life in Zagreb, Croatia, EU |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
it's this one: http://www.techpowerup.com/gpudb/b2007/asus-gt-630-silent-2-gb.html so it's a rebranded 630 http://www.geforce.com/hardware/desktop-gpus/geforce-gt-730/specifications which means it's the second one on this list . NO FAN !! it's crap did you check that out? does it really outperform the GPUs? Simple maths your card is doing units from aproxx 35 min to 78 mins and you only do 1 unit . so my AMD does them in aproxx the same times and it will do 8 at a time so yes my AMD Chip will do more than your GPU it is the 4 ghz version and that is not over clocked that is the speed out of the box My GPU does 1 unit in aprox 15 min on average it's doing 3 at a time now and takes from 29 min to 1 hr still faster than yours does . |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Klik say you buy a dual xenon chips system and the xenon chip is the ones with 16 threads per chip that means a system like that will have 32 units going at one time and that's without even adding a GPU . Even just one xenon chip with 16 threads will out perform most single GPU's |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
1. this is not a pissing contest... 2. it's the fastest I could find on server PCIe x8! & it depends on which Xeon do u buy... ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
1. this is not a pissing contest... No it's not your right but you statement about only using Gpu's is wrong to out do a Dual Xenon system without a Gpu you need mutiple Gpu's and they will have to be very high end ones and you will need more than 1 more like about 8 , 4 X 8 = 32 . And to do 4 units on a GPU you need the very high end version which will set you back something along the lines of $400 plus ozzie per GPU , big bucks There is a friend that has only 3 GPU's on his computers and they are Xenon with 12 threads and he is currently getting 90,000 as a rac and the GPU's are GTX 750 2 on 1 machine and 1 in another machine and he did not pay much for them second hand for the computers . His GPU's are new and 1 has just Stuffed up so he is back to 0 GPU on that machine . So for a comparison His dual cored Xenon with 24 cores and 2 750 GPU's is getting 38,000 That's double what i'm getting he has GTX 750 i have GTX 650 yet 18,000 more ! and that is not just because he has better GPU's they are not 100% faster than my GTX 650's more like 30% faster , 50% max yet he is getting 38,000 i'm getting aprox 18,300 , his CPU Xenon's run at 2.67 ghz my AMD runs at 4 ghz. It just boils down to how many units at 1 time he can do i can do 8 he does 24 on the CPU's Edit : my friend is being checky he must have brought a couple of 750 as both machines have 2 now but it doesn't change the example |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13746 Credit: 208,696,464 RAC: 304 |
NONE of my computers has a graphics card. I'm not a gamer, I don't do anything that NEEDS a GPU or other graphics card, so I'm not going to spend the money for one, no matter how inexpensive they are. That's pretty much the reason for using the CPU- probably 90% (or more) of desktop PC systems sold don't have an addon video card. They used to have onboard graphics, these days it's on-die graphics. And ever for those of us that do have addon video cards; If you've got it (a CPU that is), you might as well make use of it. Grant Darwin NT |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
NONE of my computers has a graphics card. I'm not a gamer, I don't do anything that NEEDS a GPU or other graphics card, so I'm not going to spend the money for one, no matter how inexpensive they are. Very true if you have a resource use it. As an important aside VLARs are only CPU doable and they very well could contain what we are looking for. To reiterate what Grant said crunch on with what you have, it is a big hay stack we are searching thru. |
Mark Stevenson Send message Joined: 8 Sep 11 Posts: 1736 Credit: 174,899,165 RAC: 91 |
1. this is not a pissing contest... If that's me your talking about Glenn 1 of the 750's in machine ID: 7403731 "let go " and had the stinky smoke from it ;-) . And the Xenon's didn't cost me that much I got 5 machines off Ebay for silly £'s and got 2 up and running to see if I could , sumthing to do 1 was sort of used for parts and aint been botherd to "play " with the other 2 yet . Other things are more important . I used to have 3 750's in that 2 in the other Xenon and the single is in my Alienware X-51 , that crunches ok +still plays Elite Dangerous |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
@spitfire_mk2 The project will go through the necessary evolutions it needs to in order to survive, barring any uncontrollable factors such as being de-funded. Your suggestion to stop using CPUs for SETI@home seems to be borne out of an interest in efficiency, that on a $/watt/credit basis, GPUs are the best resource out there. But this ignores that the project isn't about using the best resources, but rather giving the public the means to partake in science by any means necessary. Otherwise, there would be no reason to expand into the mobile market with phones and tablets crunching too. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
I have a GPU card on my Windows PC and both SETI@home and Einstein@home can use it. But the CERN programs don't use any GPU and most of the time it runs them on the AMD A10-6700 CPU, which has four cores (or 4 logical processing units according to Windows 8.1). But SETI@home had started with the idea of using "unused cycles" on ordinary PCs. Noe people build home-brew supercomputers using graphic cards just to run it. Things have changed on only in hardware but in philosophy. Tullio |
KLiK Send message Joined: 31 Mar 14 Posts: 1304 Credit: 22,994,597 RAC: 60 |
1. this is not a pissing contest... please write in complete sentences...it's hard to read what you wanted to say...at least, you are a native speaker - I'm not! also, Xeons cost a lot of money! ;) NONE of my computers has a graphics card. I'm not a gamer, I don't do anything that NEEDS a GPU or other graphics card, so I'm not going to spend the money for one, no matter how inexpensive they are. almost all new intel processors use intelHD...which is a GPU proc you can use! ;) things are moving forward - not backwards...in a few years, SETi@home should be 90% on GPU power! ;) I have a GPU card on my Windows PC and both SETI@home and Einstein@home can use it. But the CERN programs don't use any GPU and most of the time it runs them on the AMD A10-6700 CPU, which has four cores (or 4 logical processing units according to Windows 8.1). But SETI@home had started with the idea of using "unused cycles" on ordinary PCs. Noe people build home-brew supercomputers using graphic cards just to run it. Things have changed on only in hardware but in philosophy. thanks for understanding! future is comming...no mather do we want it or not! ;) non-profit org. Play4Life in Zagreb, Croatia, EU |
Mark Stevenson Send message Joined: 8 Sep 11 Posts: 1736 Credit: 174,899,165 RAC: 91 |
1. this is not a pissing contest... Do they ? mine may not be the latest gratest Xenons going but I got 5 machines off Ebay all different spec Dell Presissions for £400 for 5 of them . I 4t they were cheep meself |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Your right Mark you can get them cheap . Klik CPU's are also developing too . You need the CPU to feed the GPU anyway so why not use it . The projects are still voluntary and are meant to use free cycles !!! If people become Bionic nuts as some would say there's no reason just to change the project . I don't think there going to get rid of CPU's any time . So why not use them !! As for the IGPU and ARM processors ... IGPU not that fast and i would rather have more cores than lose them and have a IGPU And ARM processors ....there a long way short of catching up with desktops |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Well, since seeing the results from my latest CPU App I was thinking of starting a thread titled something like "Why Use Low End GPUs on SETI@home?? With even a modest i7 the CPU is much faster than a lowend GPU. In numbers they quickly add up. There are a few 24 core Xeon Macs around here, just waiting for a good CPU App. Check the numbers on this i7 and be advised Those Are Not Shorties finishing in about 1.3 hours. Those tasks have an Angle Range of 0.40 meaning they are usually about 3 times as long as a shorty. 1.3 divided by 3...do the math; Computer 60533. Also compare the CPU times to the GPU. The App is still in testing, but I believe it will be here soon. I wouldn't be surprised to see a few Windows people running Mac VMs with this App. ;-) |
Claggy Send message Joined: 5 Jul 99 Posts: 4654 Credit: 47,537,079 RAC: 4 |
almost all new intel processors use intelHD...which is a GPU proc you can use! ;) But not necessarily Xeons!!! http://ark.intel.com/ Claggy |
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