Given that the changes in PCB don't effect things too much, you should be able to expect a similar distribution out of Ti 4200 cards. Our particular Ti 4200 managed to overclock from the stock 250/444MHz clock to 330/540MHz, an improvement of 32% and 21.6% in core/memory clock speed respectively. Considering that we just pointed out the relationship between overclocking headroom and default clock speeds, these promising numbers make a lot of sense. Wow.