what is beagleboard's bottleneck? the sd card?
 

Just got my hand on a beagleboard mx.

I have ubuntu 12.04 on its sd card. I'm installing lubuntu-desktop at the moment but I'm noticing that the installation progress is going rather slow and wait % in top is going cyclically high. Is it a bottleneck because of SD card? How can it be detected?

Thanks in advance.