[AndyK]

a2z, гугл выдал на гора вот примерно такое:
RTA - Response Time Accelerator
Разгон кристалов матрицы

Цитата: This is the name given by Samsung to overdrive, a technology that accelerates the rotation of liquid crystals by increasing the voltage. In short, this isn't an artificial screening recreated by stripes of LEDs but only the overdrive activation/deactivation. In short: RTA OFF = 8 ms response time. RTA ON = 2 ms response time. This demonstration only confirms that with overdrive the image is actually better and that there was no MPA on the exhibition stand.

http://www.behardware.com/news/8705/...pa-or-rta.html
ну и видимо моде1 и 2 отличаются "разгоном" =)