Asus P8Z77-V PRO/THUNDERBOLT - Manual (Page 93)

ASUS P8Z77-V PRO 3-21
Chapter 3
NB PCIe Configuration
Allows you to configure the NB PCI Express settings.
PCIEX16_1 Link Speed [Auto]
Allows you to configure the PCIEX16_1 speed.
Configuration options: [Auto] [Gen1] [Gen2]
PCIEX16_2 Link Speed [Auto]
Allows you to configure the PCIEX16_2 speed.
Configuration options: [Auto] [Gen1] [Gen2]