User Guide

46
A
A
X
X
4
4
5
5
F
F
-
-
4
4
D
D
S
S
e
e
r
r
i
i
e
e
s
s
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
O
O
n
n
A
A
G
G
P
P
(
(
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
)
)
8
8
X
X
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
AX45F-4D Series provides an AGP 8X slot, a sky blue slot which has the latest AGP specification in motherboard. The AGP 8x calls for
the bus to operate at the basic AGP 66-MHz clock frequency and the bandwidth are 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. You can adjust AGP voltage in BIOS within a
range from 1.5V to 1.6V.
Warning: It is strongly
recommended not to adjust
voltage/clock of AGP/PCI
when connecting any SATA
service. It is because when
the voltage/clock for
AGP/PCI is adjusted, the
clock for SATA couldn’t
keep 100MHz, and the
system will be unstable.
Warning: It is strongly recommended not
to install a 3.3V AGP card, which is not
supported by SiS 655FX / 964 chipset.