Lock On ain't "ati or nvidia centered" game. Spend your money to core. I got x850xt. If I "underclock" it to 500/500, or overclock to 621/630, I got exactly the same fps. I don't know what, for example x1900xtx does, but I doubt that it's the cure for low fps (if someone is experienced about that, he could tell...). While every hz I get from my 4000+ gives me more fps :) The guestion; which one is best? Both. I got ati, not because it's the best, but because I allways have had ati, and probably will :)