Hi I just improved my rig from an Athlon X2 to a Phenom X4 (all other stuff the same).  And now my old projects in sonar pop and click.  So, obviously I need to adjust something.  I increased the cache for playback up to 520 from 256.  Still pops.  I recall the only thing that's non standard in my setup is a setting for thread scheduling in the config file.  I set it to a *1* because I read that it helped with DSP processing.  Everything else is as Sonar installs it.  I haven't tried recording with the four cores yet.  Thanks for your help in advance

Sorry it was *real time pre role* that I set to *1*.  Would that do it?

So the question is:  when one records in Sonar is it recorded with specific cpu stuff (e.g. certain threads for certain tracks etc)?

I'd run Latency Monitor to make sure you don't have some background processes running. 
Clicks and pops are usually related to things like Wi Fi or background processes taking over CPU and interupting. THey can also be from setting your buffer too low for the system to handle. 

Thanks Cactus M, increased the buffer to 512 (it was only 256) but that begs the question, why would increasing the the number of cores on my cpu require a higher buffer?!

Have you tried disabling core parking?
 
https://bitsum.com/parkcontrol/
 
EDIT: Sorry - not sure if that applies to AMD processors.
 

tenfoot, thanks for the link.  They're parked!

Hi, 
could be the wrong question,
but are you overclocking the cpu or so ?

er, not parked!

Not overclocking I wonder if it has to do with the caches on the chip.  BTW changing the buffer to 512 on the rme sound card worked, it's just kind of strange.