Bad, this is amazing card.
Still useful in all games on 1080p resolution.
I sold GTX780Ti K|NGP|N before 6 months, that's same full chip as TITAN Black, not crippled craps as companies sell today for 1200-1800$.
Mine GK110 was highly overclocked, far faster than TITAN Black but it was faster than GTX1060.
We talk about very useful chip and today, enough video memory, etc...
I would open, clean, test all capacitors and smd capacitors, controllers, regulators with multimetar, remove paste, remove pads, heat chip with heat gun if need, install in PC and again until she start to work.
Than I would install last driver for Kepler generation before Maxwell show up and never uninstall him or change him.
In that period NVIDIA is forced to give same number of CUDA cores as for professional cards only to pull 999$.
Today people could buy RTX2080, 170W GPU for that price. Whole level below. How people allow them that, I don't complain on NVIDIA any more, customers are culprits.
They could drop price on 500$ for 3 years if decide to behave rational and lucid.