Validating pcie 2 0 is enabled
Our cable is about 12cm.* Please connect shield wire in SATA2 Cable to GND at both board.* Please boot up PCIe EP system before booting PCIe RC system.
Connected by 2*mini_PCIe to standard_PCIe adaptors, 2*PEX cable adaptors, and one PCIe cable.
PCIe 3.0 features a number of interface architecture improvements, but communicates at the same interface speeds used in PCIe 2.0.
PCIe 3.0 achieves twice the communication speeds of PCIe 2.0 through various architecture and protocol management improvements.
PIO read/write TLPs will have only a doubleword length data in a packet.
For burst data transfers(which have data up to 4096 bytes but it will be probably limited to 128 byte by your motherboard chipset), you have to initate read/write from your PCIE device to PC, not from PC to PCIE.
Does it matter that the single board computer / system host board and option card interface is PCI Express version 1.1, 2.0 or even the new PCIe 3.0?