Quote Originally Posted by hoom
Thats because a 7600GT is a low-mid level card.

I have a low-high end X1900GT & it runs M2TW well enough at 1900*1200 with max. game settings & low AA/AF.

There is a huge step up from mid level to high end.
Quoted for truth.

You can get AGP versions of the X1950pro, and while its not top of the range in absolute terms, its still pretty respectable, and is by far the most powerful AGP card out there. Whether it will handle empire's or not is anyone's guess though.