Hi,
To be totally honest with you Jimbha.
The old bulldozer fx cpu`s don`t overclock very well.
Plus they also run very hot when you try to overclock them in anyway.
So really your best option is to go for a motherboard that has a amd 990fx chip set on the motherboard.
And buy a new fx cpu based on the Vishera core.
An 8350 or a 6350 would be fine, from the factory default core frequency settings of each of the cpu`s listed as an option.
You can over clock each by an extra 800 Mhz in speed with most fx cpus with a vishera core.
If you have a water cooling loop, a Aio If you get a good cpu when you buy it, you can often reach a 900 Mhz to a 1 Ghz overclock of the cpu with a few voltage adjustments, when you have a motherboard with a Amd 990fx chip set on board.
Your Noctua cooler will be just as good, as it`s a big cpu cooler, so I would expect an overclock in the 800 Mhz to 900 Mhz without much of a problem with a cpu core voltage bump to around 1.5v. Jimbha.
Asus M5A99X EVO R2.0 boards are good for overclocking and bios features to do so Jimbha.
And are very stable when overclocking provided you don`t go to mad with the OC of the cpu.