Basically yeh. It has no work so it does nothing.
Worth putting up a GTX 780 for that you think?
I wouldnt use a 780 no, i have my 780 on other things. A 780 mines the same as 2 750ti's so expect around 0.008btc a day. Its not really worth it for such a power hungry card
Technically profitable according to your 0.008btc a day; as 250w @ 0.23/kWh costs 1.38 per day, and earns 2.60 per day