Technical Reference
67
2.9.2 I/O
Shield
The back panel I/O shield for the board must meet specific dimension and material requirements.
Systems based on this board need the back panel I/O shield to pass certification testing. Figure 25
shows the I/O shield for boards with the 8-channel (7.1) audio subsystem. Figure 26 shows the I/O
shield for boards with the 6-channel (5.1) audio subsystem. Dimensions are given in inches to a
tolerance of ±0.02 inches. The figures also indicate the position of each cutout. Additional design
considerations for I/O shields relative to chassis requirements are described in the BTX
specification.
NOTE
The I/O shield drawings in this document are for reference only. I/O shields compliant with the
BTX specification are available from Intel.
Pictorial
View
13.0 TYP
[0.512]
172.9 REF
[6.808]
169.9 ± 0.12
[6.692 ± 0.005]
1.6 ± 0.12
[0.063 ± 0.005]
1.55 REF
[0.061]
8x R 0.5 MIN
9.40
[0.37]
9.65
[0.38]
Ø 1.00
[0.039]
0.00
[0.00]
9.18
[0.36]
10.18
[0.40]
5.84
[0.23]
68.32
[2.690]
17.19
[0.677]
0.00
[0.00]
23.56
[0.928]
A
A
9.18
[0.361]
11.55
[0.455]
90.34
[3.557]
110.58
[4.354]
140.39
[5.53]
OM17994
Figure 25. I/O Shield Dimensions for Boards with the 8-Channel (7.1) Audio Subsystem