A) PCI Express uses unidirectional serial “lanes” to communicate.
B) PCI Express version 1.x can range in speed from 250 megabytes per second to 8 gigabytes per second.
C) The PCI Express bus is 64-bits wide.
D) PCI Express standard is used in laptops as the ExpressCard interface.
Answer: C) The PCI Express bus is 64-bits wide.
The PCI Express standard is based on point-to-point serial connections rather than the parallel bus technology that we’ve seen with previous bus standards. The links between PCI Express devices are called “lanes,” and each lane can support 250 megabytes per second on the PCI Express 1.x version standard.
The (in)correct answers:
A) PCI Express uses unidirectional serial “lanes” to communicate.
As mentioned above, the PCI Express serial lanes provide the links between devices. There can be 1, 2, 4, 8, 16, or 32 lanes connecting a device.
B) PCI Express version 1.x can range in speed from 250 megabytes per second to 8 gigabytes per second.
The speeds of PCI Express are very fast, with the largest throughput of the PCI Express 1.x standard at 8 gigabytes per second.
D) PCI Express standard is used in laptops as the ExpressCard interface.
The electrical interface of PCI Express is used also in laptop ExpressCard interfaces, providing a standard interface for third-party devices to connect to portable systems.
 |
Want to know more? Watch “Expansion Slots.”The expansion slots are the most modular part of the PC motherboard, but what are all of these different standards? This module will walk you through the most popular expansion slot bus types, such as PCI, PCIe, and AGP. Some older technologies, such as AMR and CNR will also be detailed. |