Hopefully it will be, but as I said just something to check!
Alan G0TLK
On 10/06/2021 10:00, Reino Talarmo wrote:
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
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