I installed the 32-bit version ant it works like charm on my Win 7 64-bit machine. It’s showing less CPU usage compared with 2.7 playing the same song.
Also I tired the 64-bit version and I got heavy crackling and it played about 2 seconds of the song and then stopped because the CPU got over 90%. I guess that must be the fault of using 32-bit plugins. So I’m sticking with the 32-bit version of 2.8.
this sounds a bit like the denormal number noise problem ? This usually happens with the one or other plugin. Doesn’t matter if 32 or 64 bit.
See also http://en.wikipedia.org/wiki/Denormal (performance issue). To avoid this / check it out you can add e.g. a pink noise generator with minimal wet setting.
He is ending with 2.5.1, which is quite a few versions back ago.
I doubt Renoise crashes due to a CPU overload, if it really crashes, then it might be a plugin problem (plugin recalling nested routines that require a lot of CPU time for each instance which is a plugin bug) or a hardware problem.
If you aren’t interested trying your plugins in the 2.8 demo, you can try to isolate your plugins in 2.5 and try them one by one to see which plugin is causing the CPU overload.
But our suggestion remains to try your setup in 2.8. Renoise 2.8 is more effecient in CPU usage than 2.5.