First off, it's important to clear up any misconceptions about the ATI Radeon X1650 line of cards, which includes both the Pro and XT models. These are two very different animals, and while the Radeon X1650 Pro is simply a renamed Radeon X1600 XT on an 80nm (down from 90nm) core, with a slight jump in clock speeds, the Radeon X1650 XT represents a quantum shift for ATI's mainstream line. Why ATI chose to go this route is anyone's guess, but while the Radeon X1650 Pro is really an 80nm Radeon X1600 XT, the Radeon X1650 XT uses the new RV560 core, which probably has more in common with an X1800 GTO.



Link: SharkyExtreme