PCI Express 2.0 Specifications
- Dynamic link speed management – to control the speed at which the link is operating
- Link bandwidth notification – to notify software (operating system, device drivers, etc) of changes in link speed and width
- Capability structure expansion – to expand the control registers to better manage devices, slots and the interconnect
- Access control services – optional controls to manage peer-peer transactions
- Completion timeout control – to define a required disable mechanism plus related optional enhancements
- Function-level reset – optional mechanism to reset functions within a device
- Power limit redefinition – to redefine slot power limit values to accommodate devices that consume higher power