37
A
A
X
X
4
4
5
5
H
H
-
-
8
8
X
X
/
/
A
A
X
X
4
4
5
5
H
H
-
-
8
8
X
X
N
N
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
S
S
u
u
p
p
p
p
o
o
r
r
t
t
A
A
G
G
P
P
8
8
X
X
(
(
A
A
c
c
c
c
e
e
l
l
e
e
r
r
a
a
t
t
e
e
d
d
G
G
r
r
a
a
p
p
h
h
i
i
c
c
P
P
o
o
r
r
t
t
)
)
E
E
x
x
p
p
a
a
n
n
s
s
i
i
o
o
n
n
S
S
l
l
o
o
t
t
AX45H-8X / AX45H-8XN provides an
8x slot which is the latest AGP specification. The AGP 8x calls for the bus to operate at the basic
AGP 66MHz clock frequency and the bandwidth is 2.1Gbytes/s. It is a great improvement on the performance of 3D graphic. AGP
supports only memory read/write operation and single-master single-slave one-to-one only. AGP uses both rising and falling edge of the
66MHz clock, for 2X AGP, the data transfer rate is 66MHz x 4bytes x 2 = 528MB/s and AGP 4x mode, 66MHz x 4bytes x 4 = 1056MB/s.
Now the transfer rate is 66MHz x 4bytes x 8 = 2112MB/s.
