Video Card Problems

Hey ,
I Have a very Old video card , It's a Radeon X300 , And i want to know how i can acess it , so i can turn on anti-anlising
to get rid of jagged edges ,
And if you wanted to know , i have 2 computers and my brother (who plays flight sim on this) own's the one i am now.
My computer i just bought a new video card for not long ago , i'll let you know the name of it. but can anyone help my brother on his Video card , sometimes he gets 01.00 FPS and Maxium he's ever had on flight sim is 79 FPS
I Have a very Old video card , It's a Radeon X300 , And i want to know how i can acess it , so i can turn on anti-anlising
to get rid of jagged edges ,
And if you wanted to know , i have 2 computers and my brother (who plays flight sim on this) own's the one i am now.
My computer i just bought a new video card for not long ago , i'll let you know the name of it. but can anyone help my brother on his Video card , sometimes he gets 01.00 FPS and Maxium he's ever had on flight sim is 79 FPS