Overclocking the card in my machine led to a final stable clock of 302/552, Ti4400 speeds without issue and in a friends machine the memory is doing a heady 594MHz, not bad for 4ns Samsung TSOP modules but of course, your mileage will vary. That's why I haven't featured overclocking results here since the speeds obtainable are pretty machine specific. Ti4400 speeds should be easy for 24/7 running however, I will venture that much.