The MX440-8X overclocked exceptionally well. With the stock heat sink, I was able to achieve a stable core speed of 375mhz. That is an incredible 100mhz over stock speed. With a little better contact with the heat sink, the core should be able to achieve higher stable overclock. As mentioned before, the memory is rated to run at 3.3ns, allowing the memory to run at least 606mhz. I was able to push the BGA ram to at least 675mhz before artifacts started showing up.