Try T15x24 and open a google chrome window with some flashgame.
If that was for me, I got the cpu does not validate.
On a side note it took about 15 times of restarting the bat file to get the card back to 99% gpu load. Even trying the flash thing did not work.
As i saw it is a scrypt coin and with 15x24 i get better results , remove anything exept -H2 -i 0 -T15x24 . Can you post your actual overclock readings? 290 is good , but for scrypt i get 320 when overclocked.
I am using PrecisionX 4.2.1 and have no idea how to get it to show actual clocks like AfterBurner. I just have the GPU Clock Offset to +105 and Mem Clock Offset to +265. Even when I click on Performance Log it only shows my 670. If I click on my 570ti it stays on the 670 readings. Maybe Precision X isn't made for the 570ti yet. I'll see if I can find an updated version.