According to Asus' website this mobo should allow you to overclock your cpu.
A unique option in BIOS that enables quick overclocking up to 30% (depends on CPU and RAM). It automatically detects and optimizes every relevant parameter to provide both performance and stability.
However, judging from the comment on this
page I'm not sure you can manually control the overclocking process. It could be automatically done by the mobo.
The best thing to do is download the manual from this
link and check for overclocking options (whether they can be switched to manual. I mean if you can manually set the FSB, VDimm, Vcore, VNB, lock PCIE and PCI frequencies, etc...)