The BIOS is a standard AWARD setup which is quite cleanly laid out with important options for tweaking easily available.
Memory Voltage Selection.
Here are all the options for configuring PCI-E frequency and voltage.
This is the power management setup.
MSI have done a very good job organizing all of the overclock options and have set up the different settings to tweak in a clear manner.
The BIOS overall is well laid out and provides good options for tweaking. Most looking to overclock should find everything they need easily to get the job done.