User Guide

41
A
A
X
X
4
4
5
5
-
-
8
8
X
X
/
/
A
A
X
X
4
4
5
5
-
-
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
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c
c
P
P
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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
AX45-8X / AX45-8XN provides an AGP 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.