Overclocking is no biggie here, the card you have in mind will be nicely balanced with the CPU, even if you can't overclock it, so don't get too worried or frustrated if the motherboard/software won't play nice, it'll just give a little extra zing if you can.
Looking through the online manual it SEEMS that this board supports at least limited overclocking, try booting the system into the BIOS and check the advanced options for CPU and memory configuration.
TBH I'm a dead lazy overclocker so don't know of any suitable software, all I can suggest is you post on the overclocking forum and keep an eye out here for further replies/help.