When generating the Virtex-7 FPGA Gen3 Integrated Block for PCI Express v1.4 core for the part and package in VC709 board (XC7VX690T-2FFG1761), the core customization GUI has only VC707 to select; it does not have the VC709 option. This issue occurs only in the ISE design tools and not in the Vivado tool.
This is a known issue to be fixed in a future release of the core.
To generate the core for VC709, select the correct part and package for VC709 and select VC707 board in the core customization GUI; this will generate the core for VC709. In a future release, the VC707 option will be replaced by VC709.
Note: "Version Found" refers to the version where the problem was first discovered. 该问题可能也出现于较早版本，但未对较早版本进行特定测试。
ISE Design Suite - 14.4
Virtex-7 FPGA Gen3 Integrated Block for PCI Express (PCIe)