The AGP slot only has two mechanical keys for voltages, one for 3.3v and
one for 1.5v/0.8v. Mechanically, AGP 4x and AGP8x are the same.
> Specifications mean nothing unless the entire industry follows them! And
> make it clear to the computer builder which is which. 4 flavors of speed
> (1x, 2x, 4x, 8x), 3 flavors of AGP spec (original, 1, 2), and 3 flavors of
> physical slots.
A hardware maker must have been really stupid not to follow the AGP
standard, especially in voltage keying. And I know from first hand
experience that the Abit BH6 (even version 1.2) is no exception to that.