Polderave (or any of BOTB’s tracks) are very CPU intensive.
Your CPU probably isn’t fast enough to play it. I have an iBook G4 800mhz and it can not handle a lot of tracks that my G5 1.8 Mhz CPU can. My iBook G5 1.8 Mhz sometimes chokes too, though.
Renoise is as CPU intensive as you want to make it. It can be low impact, or it can be high. It depends on the song style.
Your best bet is to render the track to WAV and listen to it like that. Which, of course, would require paying for Renoise 
It’s worth it though, but this opinion is biased. Everyone here uses Renoise so they aren’t going to tell you it’s not.
I think rendered versions (MP3/OGG files) are in the mutant breaks compo thread so if you want to listen in iTunes or something, grab those.