The Guys at Hardware Pub never seems to sleep, Not to mention their GF3 review they also have a Kryo II mod article up. Here is a brief snip.
I'm sure most of you have read at least one review of the Kyro II that said that most overclocking attempts were disappointing or unsuccessful. In fact, from what I have read and experienced most Kyro II owners can only achieve around 185mhz, a mere 10mhz above the default core and memory clock."

Check it out Right Here