1) Message boards : Number crunching : app_info.xml file for 2 WUs/nVIDIA GPU ? (Message 53820) Posted 27 Mar 2012 by WilMar Post: Hallo Swiftmallard! I´m using a GT440 and a GTX550Ti and here are some data I took in the last few days: GT440: Run Time 1498.22 +/- 122.06 [sec] CPU Time 8.63 +/- 3.55 [sec] That does give a total relative CPU Load of 0.576 +/- 0.245 [%] That was derived from 61 observed tasks. GTX550Ti: Run Time 660.83 +/- 82.60 [sec] CPU Time 5.94 +/- 1.61 [sec] That does give a total relative CPU Load of 0.899 +/- 0.268 [%] That was derived from 277 observed tasks. The Run Times and CPU Times are taken from my Results Page at MW. All GPU taks where running at priority level of "Above Normal". I´d observe for a short time only the CPU load by the MS Process Explorer and found only about 0.2% load for these tasks, if I remember correctly. (I didn´t put this data to paper.) As you mentioned Every GPU work unit uses several seconds of CPU time at the end. All that explaines easily, why the the realtive CPU Load for the slower card is less. From this I would conclude, that only very fast GPU cards will realy profit from crunching multitasks on a single GPU. I would be pleased to get your and other comments. Kind regards Matin

2) Message boards : Number crunching : app_info.xml file for 2 WUs/nVIDIA GPU ? (Message 53815) Posted 27 Mar 2012 by WilMar Post: Please, how much is the advantage of crunching 2 tasks in parallel? This question is, as the GPU load for these files is very high - 90% or even more - and the CPU load very little - much less than 1% - for single task crunching. So one would expext only some advantage during the change of tasks at the end of a task. Kind reagrds Martin

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