My grandson is trying to get started mining bitcoins using hardware attached to his gaming computer. He has no idea about security.
I've started a learning project by building bitcoin core 0.9.2 on a Udoo Quad with attached drive. My plan is to run as a GPU miner until he learns enough linux and security process', then get more hardware. Ultimately the Udoo would hide  behind the tv and run 24-7.

0.9.2 is very slow. It has been "synchronizing with the network" for 3 days now. CPU usage seems to average between 5% and 12%. It was built using the default setup.sh-configure-make-make install route.

Any idea why it is so slow?

Also any suggestions as to which hardware to use with the Udoo would be welcomed.