[hpsdr] Whitch CPU will be better for HPSDR?

[glennt]

 An excellent question! I don't know the answer. I do know that the 
 answer will be determined by some combination of actual core MIPS and 
 how well the software chosen is able to utilize multiple cores.

 Clock speed only tells part of the story - rather like choosing an 
 antenna based solely on it's SWR. How many cycles are required to 
 execute an instruction figures into it as well. I don't know these 
 numbers for the Intel chip family. Historically other CPU manufacturers 
 (both IBM and DEC in days of old) were loath to provide these numbers. 
 The desiderata is one instruction per core CPU cycle.

 Also, some software will make better use of multiple cores than others. 
 Some processes parallelize easily (like matrix inversion) and others do 
 not (like scalar iteration - solving Kepler's equation for example).

 That being said, making the not unreasonable assumption that the Intel 
 i7 core instruction takes the same number of cycles no matter which i7 
 variant you use, then (using your numbers) the i7-6700K will execute 16 
 giga instruction cycles per second (GISS?) and the i7-5820K will execute 
 19.8 GISS.

 HOWEVER... if the software can effectively utilize only 4 (or fewer) 
 cores, you get a different answer.

 Simplifying your question a bit, you are asking how well HPSDR software 
 is able to utilize multiple cores? Since there are a whole bunch of 
 different software packages to use, as well as different OSs to use 
 (win7? win8? win8.1? win10?, Fedora? Debian?) you will likely need to 
 constrain your question a bit to specify which software you want to run.

 ...and of course, if the software uses graphics engine computational 
 resources, all these numbers change again.

 Good luck.

 73 de Glenn wb6w

 On Sat, 31 Oct 2015 19:36:15 +0100, H.A.Meijer wrote:
> Hi to you all,
>
>  I'm looking for components to build a new sdr pc for use with my
>  HPSDR hardware.
>
>  Now I'm asking myself, what would make a better " thick pipe SDR"
> CPU. 
>
>  Higher CPU clock freq. and less cores,
>  for example a, Intel Core i7-6700K, 4x 4.00GHz. ?
>  or
>  more cores and lower CPU clock freq.?
>  for example a : Intel Core i7-5820K, 6x 3.30GHz.
>
>  Any thoughts on this......
>
>  73's  Bert PA2XHF.