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AC450NX Rack Server System Product Guide
220
CPU Baseboard Configuration Jumpers
The J31 jumper block
• controls the VRMs and server management outputs
• determines core to bus ratio
• provides parking spaces for unused jumpers
OM07314
13579111315
2 4 6 8 10 12 14 16
J31
A
B
Figure 18-1. J31 Jumper Block
Table 18-1. J31 Jumpers for VRMs and Server Management
Pins 1 and 2 Pins 3 and 4 Status
1 1 Disable VRMs
1 0 Reserved
0 1 Disable Server Management
0 0 Default/Normal Operation
Key: 0 = open; 1 = closed