HP ROM-Based Setup Utility - Manual (Page 50)

Intel QPI Link Frequency
NOTE: This option is available on Gen8 servers with multiple Intel processors.
This option enables you to set the QPI Link frequency to a low speed. Running at a lower frequency
may reduce power consumption, but may also impact system performance.
Options include:
•
Auto (default)
•
Min QPI Speed
50 RBSU menu-driven interface, version 3.xx or later (G6, G7, and Gen8 servers)