Validating pcie 2 0 is enabled
Trenton single board computers, such as the BXT7059 and TSB7053, support a wide variety of PCI Express option card interfaces.Embedded motherboards, such as the JXM7031 and WTM7026, feature multiple PCI Express option card slots and the BPG8032 and BPG7087 backplanes are examples of PICMG 1.3 backplanes with built-in PCI Express 2.0 computing hardware support, while the BPX8093 PCIe backplane supports PCI Express 3.0.Correctly routing PCIe 3.0 signal traces is a design challenge that few companies can handle well, and taking short cuts in system host board, single board computer, and backplane designs which utilize the PCI Express 3.0 interface will always result in suboptimal system performance.For example, with all previous generations of PCI Express it was best practice to keep traces well below 16 inches to insure optimum performance, but the PCIe Gen3 specification makes the length requirement even more restrictive, which is why it’s so important to understand the difference between PCI Express 3.0, 2.0 and 1.1.If the motherboard is equipped with PCIe 2.0 card slots, then any PCIe 2.0 card placed into one of these slots will send its data to the board’s CPUs twice as fast as in a PCIe 1.1 system.This speed advantage is cumulative and can be critical in high-performance computing applications.
The PCI-SIG built the basic PCIe interconnects in such a manner as to ensure both scalability and backwards compatibility between the differing PCIe interfaces.
The work of packetizing and de-packetizing data and status-message traffic is handled by the transaction layer of the PCI Express port (described later).
Radical differences in electrical signaling and bus protocol require the use of a different mechanical form factor and expansion connectors (and thus, new motherboards and new adapter boards); PCI slots and PCI Express slots are not interchangeable.
This critical specification feature enables the computer’s SBC/SHB, embedded motherboard or backplane hardware to operate with just about any PCI Express option card regardless of interface version.
The potential for increased data throughput and performance within any computing platform is the primary difference between the PCI Express 3.0, 2.0 and 1.1 interfaces.