Difficult to do on the dcu2s voltage locked mine won't go past 1250 @ the max 1.25 that I can give it and even then it's unstable, with the dcu2 your really giving up some performance for its sheer silence.
Haven't used the 290 series but I jumped down from dual 7950s to a 780 at 1440p, the 780 gets lower frames but the lack of microstutter and the fact it still holds at 70-80 fps overclocked I couldn't be happier with it. I do have have the dcu2 I have it sitting at 1200/7000mhz and it's barely audible in my 350d, which is saying a lot lol.
not to many other games I can comment on bioshock infinite felt the same but it remained over 60fps and very rarely dropped under it, beyond that arma 3 still played the same grid 2 runs at a high fps on either setup so it felt the same and batman played better that's just about all i've played on both cards.
I went from cf 7950 to a 780 at 1440p, numbers wise bf4 I lost about 30 frames so 80's to 50's with the same settings the nvidia single card did feel smoother though, beyond that a ti should come a lot closer performance wise.
Any chance of getting a bigger sizes? 2xl barely fits around my shoulders after the first wash I ended up having to pull up the sleeves since they where already a quarter up my arm. A 3xl would be nice for this second run.