Posts by [TA]Assimilator1
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61)
(Message 2978)
Posted 6 May 2014 by [TA]Assimilator1 Post: Fair enough :) Incidentally electricity might be cheap in your country but it certainly isn't here in the UK. How much do you pay per unit? Btw, despite what BOINC says your CPU isn't an 8 core CPU, it's a 4 core CPU with Hyper Threading. i7 2600 info http://ark.intel.com/products/52213 .Still it's a great CPU & much quicker than mine! ;) |
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(Message 2971)
Posted 5 May 2014 by [TA]Assimilator1 Post: If you care about electricity costs then you need work out the credit/w costs too! Lol, output for the electricity used is relevant. So your 8 core @3.4 GHz PC can do 35,657 ppd & your ARM cluster 6583 ppd. Your ARM cluster draws ~31w, how much power does your PC draw at the wall? You can't know which one is the better choice until you know the cost/w basis (including system cost), otherwise you might have a situation where you'd get a similar output for less electricity cost by running your PC less then 1/5 of the day for example! (although you'd still have the noise & space issue, though seeing as you already have your PC the space is taken ;) ). Btw I'm not saying you are wrong, just that neither of us know at this point. Opps, sorry about going OT again btw :o |
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(Message 2967)
Posted 5 May 2014 by [TA]Assimilator1 Post: I discussed the cooling problem in another forum with another user, short version is I can't have an AC unit here (space, cost, electricity) nor can I fit a ducting pipe, I have thought about the latter but theirs nowhere to route such a pipe (my PC is also away from the window), also considered routing a pipe straight into the chimney pipe but theirs no guarantee that smoke wouldn't back feed under some conditions. Re AMD GPUs on A@H, also going by the rather modest performance gain of a GPU vs CPU here with Nvidia, assuming a broadly similar boost with AMD I would still keep my 5850 with MW as it's massively faster than my CPU there. |
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(Message 2949)
Posted 2 May 2014 by [TA]Assimilator1 Post: How does that compare to PCs on a credit/w basis? I look forwards to that :). Lol, true! But my room is very bad at venting heating & I'm not sure the landlady would appreciate me crunching regularly, I do run it sporadically for races etc ;) |
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(Message 2945)
Posted 1 May 2014 by [TA]Assimilator1 Post: Yea but I'll lose MW output ;) |
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(Message 2940)
Posted 30 Apr 2014 by [TA]Assimilator1 Post: I look forwards to that :). Lol, well I do have a 2nd PC, but I can't run it 24/7 unfortunately. |
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(Message 2931)
Posted 29 Apr 2014 by [TA]Assimilator1 Post: I look forwards to that :). ..... although then I'll have a dilemma, do I run A@H or MW on the grx card? ;) |
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(Message 2873)
Posted 23 Mar 2014 by [TA]Assimilator1 Post: Or perhaps it's caused by 4 to 6 hours of unannounced maintenance that has ballooned into 40 to 60 hours, or will it become 4 to 6 DAYS! Wrong! Depending what you mean by a small cache (IIRC 0.1 days?). It is not necessarily the smart thing to have a small cache & certainly it is not dumb (check your attitude dude!) to have a bigger cache!, but obviously you don't want such a large cache that your going to bust deadlines. As I've explained to you before some of us like to focus on (predominantly) one project at a time. So knowing that projects do go down for maintenance etc from time to time I set a cache of 3 days (+1). I rode out this outage, no problems, & was continuously crunching A@H so no downtime for it :), oh & I was nowhere near the deadlines either. The trick is (for single project crunching) is to set a 3day cache once you have a steady output so BOINC can get a sensible amount of WUs, that works for A@H anyway, maybe for a project with shorter deadlines (are their any?) you'd want to lower that. Also, once in a while a project is forced to cancel several thousand tasks which unfortunately sometimes trashes results waiting to upload Yea, but that's rare, very rare AFAIK so I would just chalk that upto 'shit happens' ;) As far as losing results to crashes on our own machines, baring a HDD death (what are the chances of a hard drive death the same time as project outage? Very unlikely!). I've only ever lost WUs which were currently being crunched, & that's mainly on the GPU which I caused to crash. (I've O/ced my GPU to 850 MHz which it's fine for crunching weeks at a time for, but play a YouTube video & it BSOD instantly! Lol, (wth?) So I have to hit 'set default clocks' in AMD GPU tool, then o/c to CCCs max of 775 MHz & it plays them fine, of course that means I have to remember to do that! And if I don't then the GPU WU in progress errors out & rarely a CPU task too). |
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(Message 2863)
Posted 22 Mar 2014 by [TA]Assimilator1 Post: Is there any speedup over avx? Couldn't you underclock it to 1.4 GHz & run the SSE2 app to compare times? |
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(Message 2860)
Posted 21 Mar 2014 by [TA]Assimilator1 Post: Probably the kind of question you'd get a bigger response from in the extremesystems forum. Must admit I've not seen the term military grade used for PC bits but then again I haven't bought anything new in a few years ;). I think I had a class 3 military drive in my Mk3 Cobra sometime ago, class 4 was rumoured ;). |
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(Message 2852)
Posted 20 Mar 2014 by [TA]Assimilator1 Post: Probably not then. |
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(Message 2850)
Posted 20 Mar 2014 by [TA]Assimilator1 Post: Gong show? Lol, don't know what you mean, but anyway MW doesn't have a scrn saver. MW could be a useful benchmark for A@H because it uses DP, but like you said it could still give different results nonetheless. |
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(Message 2836)
Posted 19 Mar 2014 by [TA]Assimilator1 Post: Lol. Re working out cost per credit, wouldn't my MW benchmark thread help with that? |
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(Message 2831)
Posted 18 Mar 2014 by [TA]Assimilator1 Post: Not me I just managed to keep up with you! ;) It's easy to see that you are at the point (or soon will be) where if you add the purchase price of the cheaper card to the cost of the electricity you've purchased to operate it, you've spent the equivalent of the purchase price of the more expensive card Err no, I guess you've mis-read my post as out of the 4 cards I was comparing (4870, 5850, 5870, & 6950) I bought the 5850 which was the cheapest card to run, as well as being the cheapest card to buy out of the 3 newer cards I was looking at. Oh & lol @ 1/2 marks, is that still enough for a silver star? ;) I didn't want to fill out my post too much with numbers, but here's the ones for the 4870 vs 5850. For power estimates I used AnandTechs 'bench' & their various reviews of said cards. Loaded, the 5850 uses 14w less than the 4870 in Metro, 28w less in Crysis, & 23w less in OCCT giving an average loaded power usage of ~21w less. The 5850s idle power is 40w less,(I think I got that from the bench too but I didn't record that). So 6 mths with the GPU idling (ignoring the occasional game play :P) means 40w less power draw. At 14p/kwh, 14(p) x 0.04 = 0.56p/hr x 24(hrs)= 13.44p/day x 365/2 = £24.53 saving per 6 mths. (I originally rounded daily savings to 13p/day which gave me £23.73) With the GPU crunching for 6 mths using 21w less, 7.056p/day* = £12.88/6 mths saving. *I rounded to 7p originally. Total year saving £37.41, approx. of course ;). These are the actually power figures I got :- PC as per sig but with 4870 (stock speeds) Running F@H (all 4 cores) & MW on GPU 265-272w F&H CPU only 218-220w MW on GPU, CPU 'idle' 209-211w Idle 150w Same rig with 5850 (stock speeds) :- Running F@H (all 4 cores) & MW on GPU 255-259w F&H CPU only 175w MW on GPU, CPU 'idle' 192-194w Idle 105-106w (F@H 3 cores, MW on GPU 250w) Power measured at the wall. So loaded power is a bit more than I estimated for but idle is a bit less! lol, not worked out actual cost difference but it's much faster (246s per long 213.76 WU vs 444s for the 4870, times for GPU nr 100% load) & does indeed use less power :). |
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(Message 2805)
Posted 17 Mar 2014 by [TA]Assimilator1 Post: Yea I did some maths like that for running MW, I compared my then 4870 to the 5850, 5870 & 6950. Vs the 4870 I estimated the 5850 to be ~75% faster (based on DP GFLOPs, was about right) and cheaper to run! Saving me an estimated £36.50/yr (based on 6 mths GPU crunching, 6 mths idle). Ebay prices were £60-70 (14/12/12). The 5870 I estimated would of been ~127% faster & would of cost about the same to run as the 4870. Ebay prices were £75-100, mostly about £90 ish AFAIR. And the 6950 about 135% faster than the 4870 & slightly cheaper to run largely due to it's lower idle power, loaded power was a little bit more. Again based on 6mths on 6 off. Saving about £16.50/yr. Ebay prices were £100-120 I did also compare the 5870 to the 6950 & estimated it would of cost me ~£13/yr more to run the 5870. So it would of made it pointless to buy that 1 after ~2yrs crunching. Electrical prices based on 14p/unit (Southern Electric). So the 6950 would of been the most efficient choice, but I just couldn't justify spending that much on a grx card at the time so I bought the 5850. With the longer term aim of putting that card in my 2nd rig & then getting a 6950, or maybe a 6970. Oh & the 5850 cost me £65, so not a bad price :) ..... I keep forgetting to sell the 4870! lol. |
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(Message 2787)
Posted 16 Mar 2014 by [TA]Assimilator1 Post: And for older 2nd hand cards the 5800s & 6900s perform very well too for DP tasks. The 5800s are relatively cheap on ebay too :). The HD 5850's DP is 417 GFLOPs & the 5870 544 GFLOPs The 6950 563 GFLOPs & the 6970 675 GFLOPs |
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(Message 2786)
Posted 16 Mar 2014 by [TA]Assimilator1 Post: Mikey Totally agree! At least we got some info :) Dutch Blimey give him a break, he posted only a few hours after. There is another maintenance running. The last maintenance wasn't complete so I had to start it today. It will be done within 4 - 6 hours. Touch wood & cross fingers, I guess you didn't ;) |
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(Message 2685)
Posted 10 Mar 2014 by [TA]Assimilator1 Post: Huh?? When I say electrical engineer I mean someone who not just designs circuits but builds & repairs them. I think they know what to do with the pointy end! ;). |
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(Message 2671)
Posted 9 Mar 2014 by [TA]Assimilator1 Post: Good to hear the updates still coming :),I hope the server issue is resolved now. BilBg I did know that DP was restricted on some cards, I'd assumed it was done on the chip. Interesting to know it isn't! Couldn't an electrical engineer do the modding to avoid a risky DIY? Dagorath You over analyse things ;), yes it's a personal opinion, we all have a personal opinion, some logical some not ;). You mat not have a personal relationship with h/w makers but you will have a personal opinion, different things entirely. Anyway, no more OT lol. |
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(Message 2589)
Posted 24 Feb 2014 by [TA]Assimilator1 Post: Glad it's back! :) |
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