AOpen MX4GVR - Layout (Frequency Isolation Wall)

61
M
M
X
X
4
4
G
G
V
V
R
R
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
L
L
a
a
y
yo
u
u
t
t
(
(
F
F
r
r
e
e
q
q
u
u
e
e
n
n
c
c
y
y
I
I
s
s
o
o
l
l
a
a
t
t
i
i
o
o
n
n
W
W
a
a
l
l
l
l
)
)
o
Note: This diagram for example only, it may not look exactly the same as the motherboard you
purchased.
For high frequency operation, especially when
overclocking, layout is the most important factor to
make sure both chipset and CPU are working in
stable condition. The layout of this motherboard
implements AOpen’s unique design called “Frequency
Isolation Wall”. Separating each critical portion of
motherboard into regions, where each region
operates in a same or similar frequency range, we
can avoid cross talk and frequency interference
between each region’s operations and condition. The
trace length and route must be calculated carefully.
For example, the clock trace must be equal to length
(not necessarily as short as possible) so that clock
skew will be controlled within few a pico second
(1/10
12
Sec)