The RIP process is non-parallelizable so it can't use hyper threading or multiple cores. I assume setting it to use CPU 0 only fixes some sort of data flow bug in the software. Multiple cores only benefits the RIP process when you want to RIP multiple files at once.
solventinkjet,
i learned something here.
i just assumed we could make use of multiple cores
i was able to make use of multiple cpu's and cores in sco unix in 1997 (you had to press f1 key to assign a process to core 0, f2 key to assign to core 1 etc
i had to load specific firmware to do the same thing in
windows NT5 in 1999...
the new CHEAP
dell optiplex 7020 micro we installed 10 of yesterday has 20 cores (8 physical and 12 "make believe" for running vm's)
this is shades of running 32 bit
windows on a pc with 64gb of ram and finding out that the OS can only use the first 4 gb of ram