AGP 8x/4x/2x
This is the speed which AGP transfers data from the VGA Card. The larger the number of x, the faster. 1x = 266MB/S, 2X 533MB/S & so on
The performance increase from 8X AGP over 4x is only
1-2% usually.


AGP 4X/2X/1X should all be compatabile with 8X/4X/2X/1X mobos. But you need to take note of the 1.5v/3.3v signaling voltage to prevent burning your card out. Notice that some mobo maby facing with not compatible problem and my mobo one of it.

AGP slot/card support status:
If AGP 1.0 or 2.0 card is running in 2x, 1x mode it will use 3.3v
If AGP 2.0 or 3.0 card is running in 4x mode it will use 1.5v
If AGP 3.0 card is running in 8x mode it will use 0.8v

AGP 1.0 slot supports 1x and 2x at 3.3v
AGP 2.0 slot supports 1x and 2x at 3.3v
AGP 2.0 slot supports 4x at 1.5v

AGP 3.0 slot supports 4x at 1.5v
AGP 3.0 slot supports 8x at 0.8v