barman, which tv do you have, what are the specs?
I recently bought a panasonic viera 4k 3d tv, the picture was beautiful but it was impossible to play games as the latency was horrible, VGA was the fastest but still too slow, HDMI both 1.4 and 2.0 were ridiculously slow, for example if I tried to do an outlaw it would turn into a pump due to latency on screen, I tried every option in WA and for graphics card could think of and nothing worked.
So I sent it back and got a refund and dunno what to do now lol.