Hi Alan, The AVX performs decoding calculation four or eight times faster than the same calculation without it. If the decoding level is the same, then the 30% higher current usage once every 15 s would use about one third of power or less. Of course you may wish to apply a better decoding as it will be available. Well, my calculation is a bit optimistic as decoding is not alone AVX type calculation and on that part there is no relevant difference. We should remember that in our application the current consumption is a small part of total time so it is not a high duty cycle. My bet is that difference in total power consumption is minor.
73, Reino OH3mA Lähettäjä: Alan [mailto:al...@alangroups.plus.com] Lähetetty: 10 June 2021 10:02 Vastaanottaja: WSJT software development <wsjt-devel@lists.sourceforge.net> Aihe: Re: [wsjt-devel] Call for information about PC systems being used for WSJT-X My main concern is battery life when out portable. While I agree cooling design should be OK, on older machines typically in use there will almost certainly be performance degradation due to dirt! If their CPU is hit hard on a high duty cycle will they be OK? Only the machine user will know how it performs under such loads. Thermal cycling is another consideration, again duty cycle dependent. My query is therefore how the load increase occurs, in particular the length of time it lasts and how frequent it will be. Hopefully no problem but just some things to check. Alan G0TLK, sent from my mobile device On 9 June 2021 22:49:58 Richard Shaw <hobbes1...@gmail.com <mailto:hobbes1...@gmail.com> > wrote: On Wed, Jun 9, 2021 at 4:33 PM Alan <al...@alangroups.plus.com <mailto:al...@alangroups.plus.com> > wrote: With 30% extra CPU power consumption those running on battery power might want to think twice about use of these extensions, and some on mains power might also not want to add additional thermal stress and/or electricity consumption, if it's drawn for any length of time? The cooling for your processor should be designed to handle the maximum TDP of the processor, if not, then you've got a much bigger problem. I would make an exception for laptop processors since they have very limited cooling but they should throttle anyway. Either case, it shouldn't be a problem. When there are test builds available I'll check if there's any noticeable increase in power draw. I have a very nice UPS that gives me the current draw in watts. Thanks, Richard KF5OIM _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net <mailto:wsjt-devel%40lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
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