Asrock C70M1

Asrock C70M1 is a lowcost small form factor motherboard with integrated AMD Dual-Core Ontario C-70 APU and four SATA connectors which makes it suitable for small storage or server use.


 * http://www.asrock.com/mb/AMD/C70M1/

Compilation speed
The CPU is rather slow so it may be worth avoiding some steps that make the installation unnecessarily time consuming.

Installing genkernel/genkernel-next
When you're not using systemd, you can choose between and. The former is often used with that with the thin use flag depends on  that depend on  which is extremely slow to build. On the other hand, (as of Feb 2015) pulls in that dependency unconditionally.

Therefore I recommend to avoid entirely and to build  instead and build  without the thin use flag when booting from LVM.

Changing CFLAGS, bootstrapping compiler and rebuilding the system
Either avoid bootstrapping the compiler and rebuliding the system or assign two days to the task. In a fresh installation it's not much work for you but both bootstrapping and rebuilding takes a lot of time. You may want to chain the two actions to wait only once.