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By default AMC720 and UTC002 are configured for PCIe x4 operation. The MBF can be operated in this mode, but it will not be optimal in term of data transfer speed. The
If you want to use the MBF with a PCIe x4 link (hence avoiding the modifications below), you need to change the e-key configuration of both AMC720 and AMC525 has to be changed in order to as compared to what is describe in Bringing up MBF: you will use PCIe ports 4-7 instead of ports 4-11.
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The AMC720 description for this switch is:
| Switch | Description | ON | OFF |
|---|---|---|---|
| SW4-4 | PCIe Port Bifurcation Strap | x8 | Dual x4 (Default) |
When this switch is set to OFF, it looks like this:
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