Undervolt-able 750Ti?

[aegisofrime]

Hi guys. I'm looking to buy a 750Ti and performance per watt is my priority. I'm looking to squeeze even more P/W out of the 750Ti by undervolting it, however after my voltage locked Sapphire 7850 I have wised up and realized that not all cards can be undervolted. So I would be very grateful if you guys can point me to 750Ti models that are capable of being undervolted. Thanks!